Relevant bibliographies by topics / Ozone treatments

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers
Reports

Academic literature on the topic 'Ozone treatments'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Ozone treatments.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Ozone treatments"

Morelli, Luca, Simona Carla Bramani, Marco Cantaluppi, Mara Pauletto, and Alessandro Scuotto. "Comparison among different therapeutic techniques to treat low back pain: a monitored randomized study." Ozone Therapy 1, no. 1 (April 5, 2016): 17. http://dx.doi.org/10.4081/ozone.2016.5842.

Full text

Abstract:

Idiopathic low back pain can be considered as a chronic condition, characterized by recurrent episodes of pain and functional limitation. The aim of this study is to compare two therapeutic methods to treat this chronic disease: the oxygen-ozone therapy and the diathermy through Tear® therapy. Two groups of 10 patients each who suffered from postural idiopathic low back pain due to different pathologies have been recruited. All selected patients have been evaluated through spinometry and have been given the Oswestry low back pain disability questionnaire to fill in at the beginning of the treatments and at the end of them with a three-month follow-up. The first group underwent a diathermy treatment through Tecar® therapy, whilst the second group received an oxygen-ozone therapy treatment through a paravertebral lumbar infiltration; both treatments have been associated with a standard physiokinesitherapy treatment. Data collected through Formetric spinometry show an improvement in both groups, but in the second group (treated with oxygen-ozone therapy+physiokinesitherapy), the improvement is greater (from 6% to 57%) against the first group (from 20% to 38%). In conclusion, the study has cor roborated the validity of both treatments leading to improvement of symptomatology, but while one treatment leads to some relapses after a few months, the second one has a greater healing effect, which preserves over time.

APA, Harvard, Vancouver, ISO, and other styles

Cheng, Xue Feng, James A. Olson, and Rodger P. Beatson. "A comparison between the effects of ozone and alkaline peroxide treatments on TMP properties and subsequent low consistency refining." BioResources 7, no. 1 (November 5, 2011): 99–111. http://dx.doi.org/10.15376/biores.7.1.99-111.

Full text

Abstract:

As part of a program to reduce electrical energy consumption in the refining process, the effects of the ozone and alkaline peroxide treatments on fibre and handsheet properties, prior and subsequent to low consistency (LC) refining, were assessed and compared by applying different levels of ozone and a range of peroxide and alkali charges to a primary stage hemlock thermomechanical pulp (TMP). Both highly alkaline peroxide treatments and ozone treatments decreased the specific energy required for strong mechanical pulp. The improvement in pulp strength through alkaline peroxide treatment mainly resulted from pulp surface changes caused by generation of acid groups. The highly alkaline peroxide treatments significantly increased pulp brightness but did not promote the further fibrillation during the subsequent LC refining. On the other hand, ozone treatments provided tensile strength increases, along with small brightness enhancements for the dark hemlock TMP, and increased the tensile gains obtained through LC refining. The effects of ozone treatments on tensile strength before and after LC refining were the result of pulp surface modifications, fibre swelling, and loss of fibre wall integrity due to non-selective chemical attack. High levels of ozone treatment caused tear strength to decrease during subsequent LC refining.

APA, Harvard, Vancouver, ISO, and other styles

Cayuela, J. A., A. Vázquez, A. G. Pérez, and J. M. García. "Control of Table Grapes Postharvest Decay by Ozone Treatment and Resveratrol Induction." Food Science and Technology International 15, no. 5 (October 2009): 495–502. http://dx.doi.org/10.1177/1082013209350539.

Full text

Abstract:

Continued and intermittent (12 h per day) ozone treatments (2 ppm) to control postharvest decay have been assayed during the storage of ‘Superior Seedless’, ‘Cardinal CL80,’ and ‘Regina Victoria’ table grapes (Vitis vinifera L.) at 5 °C for 72 days. The effects of these treatments on the main fruit quality parameters, including resveratrol content, were monitored. Both ozone treatments considerably reduced decay of cold stored grapes compared to those kept in air, continuous ozone treatment being the most effective for controlling postharvest losses. Intermittent ozone treatment induced the highest resveratrol content in stored grapes. On the contrary, ozone-treated grapes got lower scores in the sensory evaluation tests and also showed significantly higher weight losses than the fruits kept in air.

APA, Harvard, Vancouver, ISO, and other styles

Ye, Long Hua, Qiu Jing Li, Li Xue, Gan Wen Lie, Xiao Li Hou, and Hong Yue Chen. "Effects of Ozone and Drought on Physiological Characteristics of Three Seedling Types in South China." Applied Mechanics and Materials 522-524 (February 2014): 1089–97. http://dx.doi.org/10.4028/www.scientific.net/amm.522-524.1089.

Full text

Abstract:

Seedlings of Michelia macclurei, Cinnamomum camphora and Rhodoleiachampionii were placed in open-top chambers (OTC) with two ozonic treatments including E40 (nature air, 40 ppb) and E150 (150 ppb) and two water treatments. Physiological indexes such as chlorophyll, soluble sugar, soluble protein, proline, MDA and SOD of three seedling types were evaluated. With increasing experimental time, chlorophyll content generally decreased or remained steady, soluble sugar content increased followed by a decrease and SOD activity increased for the three seedling types in ozone treatment, drought treatment or ozone-drought intercross treatment. Contents of soluble protein and proline increased for the three seedling types in ozone treatment and drought treatment. The MDA content increased for M. macclurei and C. camphora in ozone treatment and drought treatment and for R. championii in the three stress treatments. Principal component analysis indicated that the resistance abilities of ozone, drought or intercross stress for the three seedling types was C. camphora seedlings > M. macclurei seedlings > R. championii seedlings.

APA, Harvard, Vancouver, ISO, and other styles

Sarron, Elodie, Pascale Gadonna-Widehem, and Thierry Aussenac. "Ozone Treatments for Preserving Fresh Vegetables Quality: A Critical Review." Foods 10, no. 3 (March 12, 2021): 605. http://dx.doi.org/10.3390/foods10030605.

Full text

Abstract:

Ozone is recognized as an antimicrobial agent for vegetables storage, washing, and processing. This strong disinfectant is now being used in the food industry. In this review, the chemical and physical properties of ozone, its generation, and factors affecting ozone processing efficiency were explained as well as recent regulatory developments in the food industry. By then selecting three vegetables, we show that ozone avoids and controls biological growth on vegetables, keeping their attractive appearance and sensorial qualities, assuring nutritional characteristics’ retention and maintaining and increasing the shelf-life. In liquid solution, ozone can be used to disinfect processing water and vegetables, and in gaseous form, ozone helps to sanitize and preserve vegetables during storage. The multifunctionality of ozone makes it a promising food processing agent. However, if ozone is improperly used, it causes some deleterious effects on products, such as losses in their sensory quality. For an effective and a safe use of ozone, specific treatment conditions should be determined for all kinds of vegetables. In a last step, we propose highlighting the different essential characteristics of ozone treatment in order to internationally harmonize the data relating to the treatments carried-out.

APA, Harvard, Vancouver, ISO, and other styles

Ye, Long Hua, Hai Yong Bao, Zhi Yun Wang, Gan Wen Lie, Hong Yue Chen, Xue Ping Zhang, Xiang Chen, Huan Ke, Xue Qin Tian, and Jia De Tan. "Effects of Ozone and Drought on Biomass Allocation of Four Seedlings in South China." Advanced Materials Research 864-867 (December 2013): 2478–84. http://dx.doi.org/10.4028/www.scientific.net/amr.864-867.2478.

Full text

Abstract:

Seedlings ofMichelia macclurei,Cinnamomum camphora,RhodoleiachampioniiandMytilaria laosensiswere placed in open-top chambers (OTC) with three ozonic treatments including E20 (20 ppb), E40 (nature air, 40 ppb) and E160 (160 ppb) and two water treatments. Root biomass, stem biomass and leaf biomass total biomass and root/shoot ratio of four seedling types were evaluated. The results showed that there were no significant differences in impacts of ozone stress and drought stress on root, stem, leaf, and total biomass ofM. macclureiamong different treatments. The biomass ofM. laosensisdecreased with increasing ozone concentration, whereas biomass ofC. camphoraandR. championiichanged irregularly. Most of the biomass of four kind seedlings under ozone and drought intercross stresses was lower than those under ozone stress. The root/shoot ratios of four seedling species were all low. The ratios under high concentration ozone (160 ppb) were lower than the control treatment. And the ratios of different treatments under drought were lower than those were not under drought when they were under the same concentration of ozone.

APA, Harvard, Vancouver, ISO, and other styles

Retzlaff, W. A., L. E. Williams, and T. M. DeJong. "Photosynthesis, Growth, and Yield Response of `Casselman' Plum to Various Ozone Partial Pressures during Orchard Establishment." Journal of the American Society for Horticultural Science 117, no. 5 (September 1992): 703–10. http://dx.doi.org/10.21273/jashs.117.5.703.

Full text

Abstract:

Nursery stock of plum (Prunus salicina Lindel., `Casselman') was planted 1 Apr. 1988 in an experimental orchard at the Kearney Agricultural Center, Univ. of California, near Fresno. The trees were enclosed in open-top fumigation chambers on 1 May 1989 and exposed to three atmospheric ozone partial pressures (charcoal-filtered air, ambient air, and ambient air + ozone) from 8 May to 15 Nov. 1989 and from 9 Apr. to 9 Nov. 1990. Trees grown outside of chambers were used to assess chamber effects on tree performance. The mean 12-hour (0800-2000 hr Pacific Daylight Time) ozone partial pressures during the 2-year experimental period in the charcoal-filtered, ambient, ambient + ozone, and nonchamber treatments were 0.044, 0.059, 0.111, and 0.064 μPa·Pa-1 in 1989 and 0.038, 0.050, 0.090, and 0.050 pPa·Pa-1 in 1990, respectively. Leaf net CO2 assimilation rate of `Casselman' plum decreased with increasing atmospheric ozone partial pressure from the charcoal-filtered to ambient + ozone treatment. There was no difference in plum leaf net CO2 assimilation rate between the ambient chamber and nonchamber plots. Trees in the ambient + ozone treatment had greater leaf fall earlier in the growing season than those of the other treatments. Cross-sectional area growth of the trunk decreased with increasing atmospheric ozone partial pressures from the charcoal-filtered to ambient + ozone treatment. Yield of plum trees in 1990 was 8.8, 6.3, 5.5, and 5.5 kg/tree in the charcoal-filtered, ambient, ambient + ozone, and nonchamber treatments, respectively. Average fruit weight (grams/fruit) was not affected by atmospheric ozone partial pressure. Fruit count per tree decreased as atmospheric ozone partial pressure increased from the charcoal-filtered to ambient + ozone treatment. Decreases in leaf gas exchange and loss of leaf surface area were probable contributors to decreases in trunk cross-sectional area growth and yield of young `Casselman' plum trees during orchard establishment.

APA, Harvard, Vancouver, ISO, and other styles

Puia, Carmen, Ioan Oroian, and Veronica Florian. "Effect of Ozone Exposure on Phytopathogenic Microorganisms on Stored Apples." Acta Agraria Debreceniensis, no. 15 (December 14, 2004): 9–13. http://dx.doi.org/10.34101/actaagrar/15/3350.

Full text

Abstract:

The aim of our study was to clarify the effect of ozone exposure on several phytopathogenic fungi on stored apple fruits under different storage conditions. The study was conducted at Bistrita, Romania, in the storehouse of an experimental apple orchard in 2002 and 2003. Two widely grown apple cultivars (‘Jonathan’ and ‘Golden Delicious’) were used. General microbial examination of the fruits was made during storage in order to identify the most important storage pathogens. Efficacy of six ozone treatments was evaluted on fruit decay caused by phytopathogenic fungi. Monthly observations (January, February, March and April) were made of the degree of decay and three measurements were assessed (disease frequency, disease intensity and degree of attack). Our results showed that the most important phytopathogenic fungi during storage was blue mold, caused by species of Penicillium. Disease frequency of apple fruits was very high on cv. ‘Jonathan’, much higher than on cv. ‘Golden delicious’. Ozone treatments (25 ppm ozone for 0.5 and 1.5 hours in November) caused significantly lower disease incidence on stored apple than all other ozone treatments. For longer storage, it seems that additional ozone treatments in February increased treatment efficacy. Cv. ‘Golden delicious’ seemed to be more resistant to storage diseases than cv. ‘Jonathan’ both on the untreated and treated fruits. The effect of the ozone treatments was also the most effective when 25 ppm ozone was applied for 0.5 and 1.5 hours in November.

APA, Harvard, Vancouver, ISO, and other styles

Castilo, Denise Viviane Ferreira Del, Marcello Magri Amaral, Carla Roberta Tim, Cintia Cristina Santi Martignago, Daniela Bezerra Macedo, Deisiane Del Castilo Bastos, and Lívia Assis. "Comparison of Efficacy of Unna’s boot and Ozone therapy on Chronic Venous Leg Ulcers: a series of case." Research, Society and Development 9, no. 9 (August 11, 2020): e44996967. http://dx.doi.org/10.33448/rsd-v9i9.6967.

Full text

Abstract:

The aim of this study was to evaluate and compare the effectiveness of Unna’s boot and ozone therapy on chronic venous leg ulcers. Seven patients with chronic venous leg ulcers were taken into the study and were randomly divided into two groups: Unna’s boot treatment group (BU); Ozone treatment group (OZ). The therapies were performed weekly until wound closure. The morphological descriptive results demonstrated that during the treatments, it was possible to observe the presence of semi-planar borders, granulation tissue, reduction of edema, fibrin and exudate and absence of odor. These morphological modifications were more pronounced in the OZ when compared to the BU. Furthermore, both treatments promoted the same wound healing time, never the less the ozone therapy produced a higher percentage of weekly wound reduction compared to Unna's boot. Unna's boot and ozone therapy treatments appeared to positively impact the course of wound healing in chronic wounds, however the ozone therapy may improve the healing of chronic venous leg ulcers in a higher weekly percentage.

APA, Harvard, Vancouver, ISO, and other styles

Uzun, H., E. G. Kaynak, E. Ibanoglu, and S. Ibanoglu. "Chemical and structural variations in hazelnut and soybean oils after ozone treatments." Grasas y Aceites 69, no. 2 (June 4, 2018): 253. http://dx.doi.org/10.3989/gya.1098171.

Full text

Abstract:

In the present work, the effect of ozone treatments on the structural properties of soybean oil (SBO) and hazelnut oil (HO) were investigated. The study presents the findings and results about the oxidation of HO and SBO with ozone, which has not been fully studied previously. The HO and SBO were treated with ozone gas for 1, 5, 15, 30, 60, 180 and 360 min. The ozone reactivity with the SBO and HO during the ozone treatment was analyzed by 1H, 13C NMR, FTIR and GC. The iodine value, viscosity and color variables (L*, a* and b*) of untreated and ozone treated oils were determined. Reaction products were identified according to the Criegee mechanism. New signals at 5.15 and 104.35 ppm were assigned to the ring protons of 1,2,4- trioxolane (secondary ozonide) in the ozonated oils in 1H and 13C NMR, respectively. Ozonated oils exhibited peaks at 9.75 and 2.43 ppm in 1H and NMR, which corresponded to the aldehydic proton and α-methylene group and to the carbonyl carbon, respectively. The peak at 43.9 ppm in 13C NMR was related to the α-methylene group and to the carbonyl carbon. The new signals formed in the ozonation process gradually increased with respect to ozone treatment time. After 360 min of ozone treatment, the carbon-carbon double bond signal, which belongs to the unsaturated fatty acids, disappeared completely in the spectrum. An increase in viscosity, a decrease in iodine value and a dramatic reduction in b* of the oil samples on (+) axis were observed with increased ozone treatment time.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Ozone treatments"

Kim, Jin-Gab. "Ozone, as an antimicrobial agent in minimally processed foods." Connect to resource, 1998. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1120751688.

Full text

Abstract:

Thesis (Ph. D.)--Ohio State University, 1998.
Advisor: Ahmed E. Yousef, Dept. of Food Science and Nutrition. Includes bibliographical references (leaves 200-225). Available online via OhioLINK's ETD Center

APA, Harvard, Vancouver, ISO, and other styles

Perry, Jennifer Jean. "Ozone based treatments for inactivation of Salmonella enterica serovar Enteritidis in shell eggs." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1282680734.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Dev, Kumar Govindaraj. "Effect of Ozone and Ultraviolet Irradiation Treatments on Listeria monocytogenes Populations in Chill Brines." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/35954.

Full text

Abstract:

The efficacy of ozone and ultraviolet light, used in combination, to inactivate Listeria monocytogenes in fresh (9% NaCl, 91.86% transmittance at 254 nm) and spent chill brines (20.5% NaCl, 0.01% transmittance at 254 nm) was determined. Preliminary studies were conducted to optimize parameters for the ozonation of â freshâ and â spentâ brines. These include diffuser design, comparison of kit to standard methods to measure residual ozone, studying the effect of ozone on uridine absorbance and determining presence of residual listericidal activity post ozonation. An ozone diffuser was designed using 3/16 inch PVC tubing for the ozonation of brines. The sparger was designed to facilitate better diffusion and its efficiency was tested. The modified sparger diffused 1.44 ppm of ozone after 30 minutes of ozonation and the solution had an excess of 1 ppm in 10 minutes of ozonating fresh brine solution (200ml). Population levels of L. monocytogenes were determined at various time intervals post-ozonation (0, 10, 20, 60 min) to determine the presence of residual listericidal activity. The population post ozonation (0 minutes) was 5.31 Log CFU/ml and was 5.08 Log CFU/ml after a 60 minute interval. Therefore, residual antimicrobial effect was weak. Accuracy of the Vacu-vial Ozone analysis kit was evaluated by comparing the performance of the kit to the standard indigo colorimetric method for measuring residual ozone. The kit was inaccurate in determining residual ozone levels of spent brines and 1% peptone water. Uridine was evaluated as a UV actinometric tool for brine solutions that were ozonated before UV treatment. The absorbance of uridine (A262) decreased after ozonation from 0.1329 to 0.0512 for standard 10 minutes UV exposure duration. Absorbance of uridine was influenced by ozone indicating that the presence of ozone may hamper UV fluence determination accuracy in ozone-treated solutions. Upon completion of diffuser design and ozone/UV analysis studies, the effect of ozone-UV combination on L. monocytogenes in fresh and spent brines was evaluated. Ozonation, when applied for 5 minutes, caused a 5.29 mean Log reduction while 5 minutes of UV exposure resulted in a 1.09 mean Log reduction of L. monocytogenes cells in fresh brines. Ten minutes of ozonation led to a 7.44 mean Log reduction and 10 minutes of UV radiation caused a 1.95 mean Log reduction of Listeria in fresh brine. Spent brines required 60 minutes of ozonation for a 4.97 mean Log reduction in L. monocytogenes counts, while 45 minutes resulted in a 4.04 mean Log reduction. Ten minutes of UV exposure of the spent brines resulted in 0.30 mean Log reduction in Listeria cells. A combination of 60 minutes ozonation and 10 minute UV exposure resulted in an excess of 5 log reduction in cell counts. Ozonation did not cause a sufficient increase in the transmittance of the spent brine to aid UV penetration but resulted in apparent color change as indicated by change in L*a*b* values. Ozonation for sufficient time had considerable listericidal activity in fresh brines and spent brines and when combined with UV treatment, is effective reducing L. monocytogenes to undetectable levels in fresh brines.
Master of Science in Life Sciences

APA, Harvard, Vancouver, ISO, and other styles

Kniel, Kalmia Elisabeth. "Evaluation of chemical treatments and ozone on the viability of Cryptosporidium parvum oocysts in fruit juices." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/27243.

Full text

Abstract:

Cryptosporidium parvum is a protozoan parasite historically associated with waterborne and more recently foodborne outbreaks of diarrheal illness. Contamination of certain foods, such as unpasteurized apple cider, with infective oocysts may occur as oocysts are shed in the feces of common ruminants like cattle and deer that graze in and around orchards. Cryptosporidiosis can result in a severe illness for previously healthy individuals and a life-threatening illness in immunocompromised individuals. Disease occurs after the ingestion of small infective oocysts (4 to 5 mm in size). The relatively thick membrane of the oocysts allows them to be resistant to chlorine and many other environmental pressures, making oocysts difficult to inactivate. In this study, alternative treatments to pasteurization were evaluated for their ability to inhibit C. parvum oocyst viability in fruit juices. Oocyst viability was analyzed with a cell culture infectivity assay, using a human illeocecal cell line (HCT-8) that is most similar to human infection. The percent inhibition of infection by each treatment was determined along with the corresponding log reduction for the treatments found to be most effective. Infection by treated oocysts was compared to that of control untreated oocysts. Cell monolayers were infected with 10⁶ treated oocysts or a series of 10-fold dilutions. Parasitic life stages were visualized using an immunohistochemistry system and 100 microscope fields counted per monolayer. Organic acids and H₂O₂ were added on a wt/vol basis to apple cider, orange juice, and grape juices. Malic, citric, and tartaric acids at concentrations from 1%-5% inhibited C. parvum infectivity of HCT-8 cells by up to 88%. Concentrations ranging from 0.025%-3% H₂O₂ were evaluated where addition of 0.025% H₂O₂ to each juice resulted in a >5 log reduction of C. parvum infectivity as determined with an MPN-based cell culture infectivity assay. Treating apple cider, orange juice, and grape juice with ozone for a time period of 30 seconds up to 15 minutes at 6Â° and 22Â°C (0.9 g/L flow rate) inhibited C. parvum viability to > 90% as monitored in the cell culture assay. It is hypothesized that oocyst wall proteins that are necessary for infection are oxidized by the reactive oxygen species generated from the decomposition of the ozone and hydrogen peroxide treatments. These treatments or combinations thereof may offer potential alternatives to traditional pasteurization for fruit juices to successfully inhibit C. parvum viability.
Ph. D.

APA, Harvard, Vancouver, ISO, and other styles

Borikar, Devendra Dhondu. "Evaluations of conventional, slow sand filtration, ozone, ozone/H2O2 and UV/H2O2 treatments for decontamination of the selected PPCPs and EDCs and their effect on THMs formation potential." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/49949.

Full text

Abstract:

Pharmaceuticals, personal care products (PPCPs), endocrine disrupting compounds (EDCs), and disinfectant by-products (DBPs) in drinking water are all associated with potential health implications that warrant their removal and formation prevention during drinking water treatment. This work presents the results of several pilot scale studies carried out using; a) dual train conventional treatment processes of coagulation, flocculation, sedimentation, filtration (conventional); and b) (multistage) slow sand filtration (SSF); both coupled with ozone and advanced oxidation processes (AOPs) such as ozone/H₂O₂ and UV/H₂O₂ using natural water from three different sources. Removal of selected PPCPs and EDCs (as a group) was limited (on average 30%) by conventional treatment. On the contrary, ozone/H₂O₂ plus conventional was the most effective process (average of about 97%) to remove the selected PPCPs and EDCs, followed closely by ozone along with conventional treatment which was also very effective; however, at a slightly lower percent (average 95%) removal. Overall, ozone/H₂O₂ or ozone followed by conventional was very effective, irrespective of the raw water quality. However, the effectiveness of conventional treatment plus UV/H₂O₂ AOP was varied by raw water quality, resulting in reduced efficiency for lower raw water quality containing higher organics, bicarbonates, carbonates and particles. The average removal of PPCPs and EDCs with conventional plus UV/H₂O₂ treatment was about 86%. Experiments involving ozone or ozone/H₂O₂ followed by SSF also showed relatively high removals of target contaminants. On average, the removal rates of PPCPs and EDCs were around 95-100% for the combined processes. In comparison, stand-alone ozone or ozone/H₂O₂ showed removals of around 77% of PPCPs and EDCs. Reduction of disinfection by-products formations, measured as THM-FP (trihalomethanes formation potential), was also investigated over the course of all pilot studies and for each of the treatment scenarios. In most experiments, application of ozone/H₂O₂ and ozone alone upstream of the conventional led to additional reductions in THM-FPs as compared to that of the standalone conventional treatment. However, in most experiments, UV/H₂O₂, when applied downstream of the conventional process, increased THM-FPs of the conventionally treated water. SSF process showed to be effective and reduced 71% of THM-FPs.
Applied Science, Faculty of
Chemical and Biological Engineering, Department of
Graduate

APA, Harvard, Vancouver, ISO, and other styles

Metivier, Romain. "Ecologie microbienne de produits végétaux : Adaptation de traitements assainissants pour la valorisation de ces produits." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0419/document.

Full text

Abstract:

L’utilisation de coproduits en tant que matière première provenant d’une autre voie industrielle, fait qu’il n’est plus considéré comme « déchet ». Leur valorisation est donc un axe de développement pour les entreprises agronomiques et agroalimentaires. Cependant, leur nouveau statut de « matière première » entraîne des contraintes pour les industriels.Celles-ci sont diverses selon les voies de destination : sanitaires, toxicologiques …Ce travail s’intéresse à deux coproduits issus de filières différentes de transformation végétale :(1) l’épiderme de pomme, comme source d’antioxydants. Leur valorisation passe par l’emploi de matières premières peu traitées d’un point de vue phytosanitaire qui pourront être a priori plus contaminées par des flores diverses.(2) Les broyats de végétaux issus de la culture céréalière comme matière première de produits biosourcés. Ils présentent naturellement de fortes contaminations en microorganismes sporulés.La valorisation de ces deux coproduits nécessite donc des traitements assainissants adaptés.Ainsi, il était indispensable de déterminer la nature, la variabilité et l’évolution des écologies microbiennes présentes sur ces coproduits par des techniques rapides de dénombrement ainsi que d’identification par biologie moléculaire. L’étude de différents procédés assainissants a également été réalisé pour combiner l’efficacité de désinfection à la préservation des qualités nutritionnelles (pomme) ou des propriétés physiques (broyats)
The use of byproduct as raw material from another industrial sector, facts that it is not considered any more as "waste". Their valuation is thus an axis of development for the agronomic and food-processing industry. However, their new consideration of "raw material" entails constraints for the industrialists. These constraints are diverse according to the destination ways of the byproduct: sanitary, toxicological… This work focus on two byproducts resulting from different vegetable process: (1) apple peels, as antioxidant source. Their valuation needs to use raw materials with low phytosanitary treatment, so these materials may be more contaminated by different floras. (2) Crushed vegetable matter stemming from cereal crop as raw material of biosourced products. They occur naturally a strong microbial spore contamination. The valuation of these two byproducts requires adapted cleaning treatments. So, it was the main thing to determine nature, variability and evolution of the present microbial ecologies of these byproducts by fast techniques of enumeration and identification by molecular biology. The study of different cleaning process was also realized to combine efficiency of disinfection with the preservation of nutritional qualities (apple) or physical properties (crushed vegetable matter)

APA, Harvard, Vancouver, ISO, and other styles

Robertson, Louise. "Optimising coagulation and ozone pre-treatments and comparing the efficacy of differently pre-treated grain distillery wastewaters in an upflow anaerobic sludge blanket (UASB) reactor." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86286.

Full text

Abstract:

Thesis (MScFoodSc)--Stellenbosch University, 2014.
ENGLISH ABSTRACT: Large volumes of high strength wastewater are generated annually by distilleries. Treatment of this wastewater is essential to increase its reuse potential. Anaerobic digestion (AD) has been widely applied as high strength wastewater treatment. Additionally, grain distillery wastewater (GDWW) is high in fats, oils and grease (FOG) which can cause problems during AD. Pre-treatment is therefore often required to make the AD process more efficient. The overall objective of this study was to investigate the operational efficiency of upflow anaerobic sludge blanket (UASB) reactors while treating GDWW as substrate. The first aim was to investigate the pre-treatment of the GDWW specifically for the removal of FOG by evaluating the effect of pH adaption, coagulant concentration and ozone (O3) dosages on the FOG reduction efficiency. Secondly, the effect of two different pre-treatments (only coagulant and coagulant and ozone) on the subsequent UASB treatment step was investigated. The pH of raw GDWW (pH 3.4) was adapted to three different pH values (5.0, 6.0, and 7.0) and the coagulant, aluminium chlorohydrate (ACH) (140 mg.L-1), was added. To make the process more economically viable, the lowering the coagulant concentration (to 100 mgACH.L-1) was also investigated. Optimal reductions for chemical oxygen demand (COD) (33.2% ± 4.93), total suspended solids (TSS) (91.9% ± 1.73) and FOG (84.1% ± 1.98) were, however, achieved at a higher coagulant concentration of 140 mgACH.L-1, and at a wastewater pH of 7.0. The effect of additional ozone treatment was also investigated. Maximum reductions for the ozone treatment were obtained at 100 mgO3.L-1 for COD (3.6% ± 4.08), and at 900 mgO3.L-1 for TSS (27.7% ± 5.58) and FOG (23.9% ± 1.83). The ozone treatment was most efficient for FOG reduction (in terms of mg FOG reduced per mg ozone) at 100 mgO3.L-1. An ozone dosage of 300 mgO3.L-1, was decided on based on economic feasibility, findings in literature on toxicity of ozone and the potential degradation of recalcitrant compounds at this dosage. The final pre-treatment thus included pH adaption to 7.0, coagulant dosage of 140 mgACH.L-1, and an ozone dosage of 300 mgO3.L-1. The second part of this study involved the operation of two 2 L laboratory scale UASB reactors for 277 days. The substrate of the first reactor contained GDWW that had only undergone coagulant pre-treatment (Rcontrol), while the substrate of the second UASB reactor consisted of GDWW that had undergone coagulant and ozone pre-treatment (Rozone). Both reactors treated the pre-treated GDWW successfully at ca. 9 kgCOD.m-3d-1. COD reductions of 96% for Rcontrol and 93% for Rozone, were achieved. FOG reductions (%) showed variations throughout the study and maximum reductions of 88% and 92% were achieved for Rcontrol and Rozone, respectively. The Rozone produced more biogas, but the methane content was similar for both reactors. The additional ozone pre-treatment did not show any added benefits to the reactor performance results. UASB granule washout in Rcontrol did, however, suggest possible toxicity of unsaturated fatty acids present in the non-ozonated substrate. The feasibility of FOG removal was shown as both reactors successfully treated pre-treated GDWW. Ozonation, after a coagulant dosage, which resulted in further reduction in the FOG content of the GDWW, is thus not essential to ensure the success of an anaerobic digestion step. Ozonation of the pre-treated GDWW could, however, be beneficial to gas production and the efficiency of a tertiary biological process.
AFRIKAANSE OPSOMMING: Groot volumes hoë-sterkte afloopwater word jaarliks deur distilleerderye opgelewer. Die behandeling van hierdie afloopwater is noodsaaklik om die hergebruiksmoontlikheid daarvan te verhoog. Die toepassing van anaërobiese vertering (AV) is wydverspreid in hoë-sterkte afloopwaterbehandeling. Graandistillerings-afloopwater (GDAW) is boonop hoog in vette, olies en ghries (VOG), wat probleme kan veroorsaak tydens AV. Voorbehandeling word dus dikwels verlang om die AV meer doeltreffend te maak. Die oorhoofse doelstelling van hierdie studie was om die doeltreffendheid van opvloei-anaërobieseslykkombers- (OAS-) reaktore wat GDAW as substraat behandel, te ondersoek. Die eerste mikpunt was om die voorbehandeling van die GDAW, te ondersoek vir die verwydering van VOG. Dit is uitgevoer deur die uitwerking van pH aanpassing, koagulantkonsentrasie en osoon(O3)dosis op VOG vermindering te evalueer. Tweedens is die uitwerking van twee verskillende voorbehandelings (slegs koagulant asook koagulant en osoonbehandeling) op die opvolgende OAS-behandelingsstap ondersoek. Die pH van rou GDAW (pH 3.4) is aangepas tot drie verskillende pH waardes (5.0, 6.0 en 7.0) en die koagulant, aluminium-chlorohidraat (ACH), is bygevoeg (140 mg.L-1). Om die proses meer ekonomies uitvoerbaar te maak is ‘n verlaagde koagulantkonsentrasie (verlaag tot 100 mgACH.L-1) ook ondersoek. Die optimale afnames vir chemiese suurstofvereiste (CSV) (33.2% ± 4.93), totale oplosbare vastestowwe (TOV) (91.9% ± 1.73) en VOG (84.1% ± 1.98) is egter bereik teen ‘n hoër koagulant konsentrasie van 140 mgACH.L-1, en teen ‘n afloopwater-pH van 7.0. Die uitwerking van ‘n bykomende osoonbehandeling is ook ondersoek. Die hoogste afnames tydens die osoonbehandeling is bereik teen 100 mgO3.L-1 vir CSV (3.6% ± 4.08), en teen 900 mgO3.L-1 vir TOV (27.7% ± 5.58) en VOG (23.9% ± 1.83). Die osoonbehandeling was mees doeltreffend vir VOG (in terme van mg VOG verwyder per mg osoon) teen 100 mgO3.L-1. Daar is besluit op ‘n van 300 mgO3.L-1, as gevolg van die ekonomiese uitvoerbaarheid, bevindinge in literatuur vir die toksisiteit van osoon, en die moontlike afbraak van moeilik-afbreekbare komponente teen hierdie dosis. Die finale voorbehandeling het dus bestaan uit ‘n aanpassing van die afloopwater-pH na 7.0, ‘n koagulantdosis van 140 mgACH.L-1, en ‘n osoondosis van 300 mgO3.L-1. Tydens die tweede gedeelte van hierdie studie is twee 2 L laboratoriumskaal OAS reaktore bedryf vir 277 dae. Die substraat van die eerste reaktor het GDAW bevat wat slegs ‘n koagulant-voorbehandeling ondergaan het (Rkontrole), terwyl die substraat van die tweede OAS-reaktor GDAW bevat het wat koagulant- en osoon-voorbehandeling ondergaan het (Rosoon). Beide reaktore het die voorbehandelde-GDAW suksesvol behandel teen ‘n organieseladingstempo van ca. 9 kgCSV.m-3d-1. Afnames in CSV van 96% vir Rkontrole en 93% vir Rosoon, is bereik. Tydens die studie is deurlopende wisseling in VOG verwydering (%) waargeneem, en die hoogste verwyderings wat bereik is, is onderskeidelik 88% en 92% vir Rkontrole en Rosoon. Die Rosoon het meer biogas geproduseer, maar die metaanpersentasie was soortgelyk vir beide reaktore. Die osoon-voorbehandeling het nie enige toegevoegde voordele getoon in die reaktorprestasie resultate nie. Die uitwas van die OAS-granules vir die Rkontrole het egter moontlike toksisiteit van onversadigdevetsure aangedui, wat moontlik teenwoordig kon wees in die nie-geösoneerde substraat. Die uitvoerbaarheid van VOG verwydering is getoon aangesien beide reaktore voorbehandelde GDAW suksesvol behandel het. Osonering, wat verdere afname in die VOG inhoud van GDAW teweeggebring het (na ‘n koagulant dosis), is dus nie noodsaaklik vir die suksesvolle verloop van ‘n anaërobiese-verteringsstap nie. Osonering van die voorbehandelde GDAW kan egter voordelig wees vir gasvorming, en kan ook verder die doeltreffendheid van ‘n tersiêre biologiese behandeling verhoog.

APA, Harvard, Vancouver, ISO, and other styles

Siddiqui, Mohamed Shakeel. "Ozone-bromide interactions in water treatment." Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/185847.

Full text

Abstract:

Ozonation of drinking waters, particularly as a preoxidant, is becoming a widespread practice. Ozone is a powerful oxidant and reacts with many of the natural constituents present in water. The presence of bromide ion in water can lead to the formation of brominated disinfection by-products upon ozonation. The existence of brominated by-products in a public water supply could be of public health concern since some of them have been shown to be mutagenic. Production of both organic and inorganic by-products upon ozonation of waters containing bromide ion was investigated. Organic by-products identified include bromoform, dibromoacetonitrile (DBAN), and 1,1(DBAA); inorganic by-products identified include bromate, hypobromous acid and hypobromite ion. Formation of by-products is a function of bromide ion concentration, the source and concentration of humic substances, pH, ozone dose, temperature, alkalinity and reaction time. Bromoform concentration ranged from 5 to 60 $\mu$g/L and total organic bromine (TOBr) concentration varied from 15 to 150 $\mu$g/L for a bromide concentration ranging from 0.5 to 1.5 mg/L. TOBr concentrations were much higher than bromoform indicating that bromoform constitutes only a fraction of the pool of brominated DBP material. Bromate threshold levels were shown to vary according to precursor source and pH level. At pH 7.5 bromide threshold concentrations for bromate were higher than at pH 8.5; the exact opposite case was observed for bromoform. Ionic strength had no significant effect on the formation of by-products whereas an increase in alkalinity resulted in decreased amounts of by-products. Temperature effects are manifested in two different ways: (i) the water temperature at which ozonation was carried out versus (ii) the subsequent incubation temperature. While enhanced precursor oxidation was observed at higher ozonation temperatures, the partial oxidation by-products varied in their reactivity in forming brominated by-products upon incubation. An increase in incubation temperature from 20 to 30$\sp\circ$C produced about a 30% increase in bromoform where as an increase in ozonation temperature resulted in a 20% increase in bromoform. Results of this research indicate that control of by-products can be effected by using PEROXONE (hydrogen peroxide plus ozone) or ammonia. PEROXONE produced 55% less organic by-products at the cost of a 25% increase in bromate. Ammonia addition resulted in a 30% decrease of both organic and inorganic by-products.

APA, Harvard, Vancouver, ISO, and other styles

Zakaria, Khalid. "Industrial wastewater treatment using electrochemically generated ozone." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2596.

Full text

Abstract:

The remediation of industrial wastewater is highly challenging, difficult task, and demands highly efficient technologies. Electrochemical and ozonation technologies are among the most efficient methods in treating the industrial wastewater. The electrochemical generation of ozone can provide very high concentrations of the reagent in both the gas phase and solution. The aim of the research reported in this thesis was to develop durable and highly efficient Ni/Sb – SnO2 anodes to generate ozone and to investigate their efficiency in treating industrial wastewater. Different anode sizes were studied: 0.64 cm2, 6.25 cm2 and 24 cm2 using Ti mesh as substrate. With respect to the 0.64 cm2 anodes, replacing Sb and Ni chlorides with their respective oxides and adding Au or Pb had little or no effect upon the anodes electrochemical properties. The research showed that all 0.64 cm2 anodes were porous with dimensionalities < 2. However, the presence of the Au in the precursors reduced the ozone current efficiency. The 0.64 cm2 anodes achieved ozone current efficiencies of ca. 30% at cell voltages of 2.7 V routinely. Using 6.25 cm2 anodes prepared with the Sb and Ni oxides in the precursor solution and annealed at 550 oC gave electrodes which were durable for more than 200 h operation at a current density of 100 mA cm-2 (corresponding to cell voltages of ca. 3 V) in 1 M HClO4. These current densities and service life are the highest reported for Ni/Sb – SnO2 anodes. A service life of more than 600 h was achieved in a later investigation. The 6.25 cm2 anodes achieved current efficiencies up to 38%, with 25 -30% routinely achievable. The presence of Ni is crucial for ozone generation with optimum Ni content (in the precursor solution) of ca. 1.04 at % Ni. The optimum annealing temperature was 460 oC. In terms of the 24 cm2 anodes, they were employed to prepare membrane electrode assemblies (MEA’s) for ozone generation from deionised (Millipore) water. MEA’s with air breathing cathodes suffered from flooding of the cathode pores, resulting in limited current densities. MEA’s with hydrogen – evolving cathodes did not suffer from flooding or low current densities. Overall, current efficiency of ca. 36 % at cell voltage of 1.6 V (40 mA cm-2) with Millipore water as anolyte was obtained using MEA’s with air breathing Preface vii cathodes; corresponding to a power consumption of 16.7 kWh (kg O3)-1 which is the lowest reported for electrochemical ozone generation of any description, MEA’s with H2 cathodes achieved a current efficiency of 33% at ca. 25 mA cm-2 and a cell voltage of 2.5 V, corresponding to ca. 25 kWh (kg O3)-1. The 0.64 cm2 anodes were used to decolourise solutions containing : Reactive Blue 50 (RB50), Naphthol Green B (NGB) and Congo Red (CR) dyes. The operational conditions of the decolourisation process were investigated and the optimum conditions were: 3 g dm-3 Na2CO3 as electrolyte, 50 mA cm-2 and 200 mg dm-3 dye in Millipore water. RB50 solutions could be decolourised completely within 20 min, with 90% of the COD removal after 60 min, NGB and CR proved more refractory. Indirect oxidation mediated by OH radicals was the main decolourisation mechanism at the Ni/Sb – SnO2 anodes. Ozonation, UV254 irradiation and O3/UV were used to decolourise the dye solutions for comparison with electrochemical decolourisation at the Ni/Sb – SnO2 anodes. Ozone was generated by MEA – based electrochemical cells and ozonation occurred in a bubble column reactor (BCR). The O3/UV combination was the most efficient, achieving 100 % decolourisation of RB50 and NGB solutions within 20 and 35 min, respectively, with 33% and 64% COD removal after 60 min.

APA, Harvard, Vancouver, ISO, and other styles

Grima, N. M. M. "Kinetic and mass transfer studies of ozone degradation of organics in liquid/gas-ozone and liquid/solid-ozone systems." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/3351.

Full text

Abstract:

This work was concerned with the determination of mass transfer and kinetic parameters of ozone reactions with four organic compounds from different families, namely reactive dye RO16, triclocarban, naphthalene and methanol. In order to understand the mechanisms of ozone reactions with the organic pollutants, a radical scavenger (t-butanol) was used and the pH was varied from 2 to 9. Ozone solubility (CAL*) is an important parameter that affects both mass transfer rates and chemical reaction kinetics. In order to determine accurate values of the CAL* in the current work, a set of experiments were devised and a correlation between CAL* and the gas phase ozone concentration of the form CAL*(mol/L) = 0.0456 CO3 (g/m3 NTP) was obtained at 20°C. This work has also revealed that t-butanol did not only inhibit hydroxyl radical reactions but also increased mass transfer due to it increasing the specific surface area (aL). Values of the aL were determined to be 2.7 and 3.5 m2/m3 in the absence and presence of t-butanol respectively. It was noticed that the volumetric mass transfer coefficient (kLa) has increased following the addition of t-butanol. Ozone decomposition was studied at pH values of 2 to 9 in a 500 mL reactor initially saturated with ozone. Ozone decomposition was found to follow a second order reaction at pH values less than 7 whilst it was first order at pH 9. When the t-butanol was added, the decomposition of ozone progressed at a lower reaction order of 1.5 for pH values less than 7 and at the same order without t-butanol at pH 9. Ozone decomposition was found significant at high pHs due to high hydroxide ion concentration, which promotes ozone decomposition at high pHs. The reaction rate constant (k) of RO16 ozonation in the absence of t-butanol was determined. The result suggests that RO16 degradation occurs solely by molecular ozone and indirect reactions by radicals are insignificant. The chemical reaction of triclocarban with ozone was found to follow second order reaction kinetics. The degradation of naphthalene using the liquid/gas-ozone (LGO) system was studied. This result showed that hydroxyl radicals seemed to have limited effect on naphthalene degradation which was also observed when a radical scavenger (t-butanol) was used. Reaction rate constants were calculated and were found around 100 times higher than values reported in the literature due to differences in experimental conditions. From the results of the experimental investigation on the degradation of methanol by ozone it was found that the rate constant (k) of the degradation reaction increased at pH 9. The reaction stoichiometry was found to have a value of 1 mol/mol. The two steps of the liquid/solid-ozone (LSO) system were studied on beds of silica gel and a zeolitic material (D915) and the ozone adsorption process was modeled and found that particle rate controls ozone adsorption step but liquid rate controls the water treatment step. Ozone desorption with pure deionised water was studied. The water flow rate was found to accelerate the desorption rates but pH was found to decrease the desorption rates. In contrast, the effect of pH was insignificant in the presence of t-butanol. Determination of the adsorption isotherms for RO16, naphthalene and methanol revealed that RO16 did not exhibit adsorption on silica gel, but both naphthalene and methanol showed adsorption on D915 described by Langmuir model.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "Ozone treatments"

Ozone World Congress (11th 1993 San Francisco). Ozone in water and wastewater treatment. San Francisco: International Ozone Association, 1993.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Melenios, P. Treatment of textile effluents with ozone and adsorbents. Manchester: UMIST, 1996.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Price, Michael L. Ozone and biological treatment for DBP control and biological stability. Denver, CO: AWWA Research Foundation, 1994.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Ozone in drinking water treatment: Process design, operation, and optimization. Denver, CO: American Water Works Association, 2005.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Rakness, Kerwin L. Ozone in drinking water treatment: Process design, operation, and optimization. Denver, CO: American Water Works Association, 2006.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Ad-hoc Technical Advisory Committee on ODS Destruction Technologies. Ad-hoc Technical Advisory Committee on ODS Destruction Technologies. [Nairobi]: The Programme, 1992.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Sartori, Helfred Erwin. New hope for AIDS: A comprehensive analysis of diagnosis and management of AIDS, with emphasis on the effective treatment with bio-enhanced ozone, herbal immunostimulation, etc. Washington, D.C: The Life Science Universal Research Center, 1990.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

R, Perry, and McIntyre A. E, eds. The role of ozone in water and wastewater treatment: Proceedings of the international conference, London, 13-14 November 1985. London: Selper, 1985.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

AWWA Seminar on Practical Experiences with Ozone for Organics Control and Disinfection (1990 Cincinnati, Ohio). Proceedings: AWWA Seminar on Practical Experiences with Ozone for Organics Control and Disinfection : annual conference, Cincinnati, Ohio, June 17-21, 1990. Denver, CO: American Water Works Association, 1990.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Swilling, Jacob. Beyond bypass and chelation for heart problems and cardiovascular disease. Irvine, CA: Know Your Options Inc., 2003.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Book chapters on the topic "Ozone treatments"

Vijay Rakesh Reddy, S., D. V. Sudhakar Rao, and R. R. Sharma. "Ozone Treatments." In Novel Postharvest Treatments of Fresh Produce, 217–40. Boca Raton, FL : CRC Press, 2017.: CRC Press, 2017. http://dx.doi.org/10.1201/9781315370149-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Radvar, Sarvin, Sepideh Karkon-shayan, Ali Motamed-Sanaye, Mohammadreza Majidi, Sakineh Hajebrahimi, Negar Taleschian-Tabrizi, Fariba Pashazadeh, and Amirhossein Sahebkar. "Using Ozone Therapy as an Option for Treatment of COVID-19 Patients: A Scoping Review." In Identification of Biomarkers, New Treatments, and Vaccines for COVID-19, 151–60. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71697-4_12.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Kogelschatz, U. "Advanced Ozone Generation." In Process Technologies for Water Treatment, 87–118. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4684-8556-1_9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Amundson, Robert G., Robert J. Kohut, and John A. Laurence. "Mineral Nutrition, Carbohydrate Content and Cold Tolerance of Foliage of Potted Red Spruce Exposed to Ozone and Simulated Acidic Precipitation Treatments." In Management of Nutrition in Forests under Stress, 175–82. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3252-7_16.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Arvanitoyannis, Ioannis S. "Ozone for Food Waste and Odour Treatment." In Ozone in Food Processing, 201–21. Oxford, UK: Wiley-Blackwell, 2012. http://dx.doi.org/10.1002/9781118307472.ch12.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Klein, H. P. "Ozone in Water Treatment Processes." In Process Technologies for Water Treatment, 145–56. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4684-8556-1_13.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Agrillo, Alessandro. "Conservative Treatment: Oxygen-Ozone Therapy." In Bisphosphonates and Osteonecrosis of the Jaw: A Multidisciplinary Approach, 121–25. Milano: Springer Milan, 2011. http://dx.doi.org/10.1007/978-88-470-2083-2_11.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Hoigné, J. "The Chemistry of Ozone in Water." In Process Technologies for Water Treatment, 121–41. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4684-8556-1_11.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Leitzke, O. "Applications of Ozone in Water Treatment." In The Modern Problems of Electrostatics with Applications in Environment Protection, 265–303. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4447-6_19.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Norton, Tomás, and Paula Misiewicz. "Ozone for Water Treatment and its Potential for Process Water Reuse in the Food Industry." In Ozone in Food Processing, 177–99. Oxford, UK: Wiley-Blackwell, 2012. http://dx.doi.org/10.1002/9781118307472.ch11.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Ozone treatments"

Ju, Sanghyun, Kangho Lee, Myung-han Yoon, Antonio Facchetti, Tobin Marks, and David Janes. "High-Performance Enhancement-mode ZnO Nanowire Field-Effect Transistors with Organic Nanodielectrics: Effects of Ozone Treatments." In 2006 64th Device Research Conference. IEEE, 2006. http://dx.doi.org/10.1109/drc.2006.305079.

Full text

APA, Harvard, Vancouver, ISO, and other styles

SITAREK-ANDRZEJCZYK, Monika, Jarosław PRZYBYŁ, and Marek GAJEWSKI. "THE EFFECT OF POST-HARVEST TREATMENT AND STORAGE CONDITIONS ON VITAMIN C CONTENT IN TWO LEAFY PARSLEY CULTIVARS." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.018.

Full text

Abstract:

The objective of the study was to determine the content of vitamin C (L-ascorbic acid) in two leafy parsley (Petroselinum crispum Mill. Fuss) cultivars subjected to different post-harvest treatments. Ascorbic acid (AA), due to its instability, is one of the indicators of leafy vegetable freshness and quality. High content of this compound in vegetables is desired because of its bioactive properties. The cultivars differ in morphology of usable parts: ‘Rialto’ has flat lamina and ‘Petra’ triple-curled lamina. The plant material was obtained in 2015 and 2016 from experimental field in Warsaw-Wilanów. The leaves were washed directly after harvest: a) in tap water or b) in tap water with ozone added. Two methods of postharvest storage were applied: A) at the cold store and B) under simulated retail conditions. In the case of cold store method (A), the plants were tied in tufts and stored at the temperature of 0 °C and RH 90 % for 7, 14, 28 days in two variants: 1) in containers, where leaves petioles were immersed in water, and 2) in special bulk modified atmosphere packaging (MAP), dedicated to fresh herbs (Stepac, Israel). In the case of storage under simulated retail conditions (B), the leaves were kept for 48 hours at 10 °C, RH 30-40 % in two variants: 1) tufts wrapped in perforated PE film with petioles immersed in water, and 2) packed to retail MAPs, dedicated to leafy herbs (Stepac, Israel). Concentration of L-ascorbic acid in the leaves was determined spectrophotometrically, with the method based on reaction of Folin’s phenol reagent in low pH. Fresh and stored ‘Rialto’ leaves were characterised by a higher concentration of AA than ‘Petra’ leaves (110 and 44 mg g -1 f.w., respectively). Significant decrease of AA after ozone treatment was observed only for ‘Rialto’ directly after harvest. Storage length had significant influence on the content of AA in both cultivars. Decrease of AA content was observed during storage period. Average concentration of AA after 7 days of storage was 85 and 44 -1 f.w. for ‘Rialto’ and ‘Petra’, respectively. After 28 days of storage the concentration was 54% lower for ‘Rialto’ and 36% lower for ‘Petra’, compared to the initial content. Leaves after simulated retail conditions showed slightly lower AA content than those stored for 7 days in the cold room. Retail MAPs guaranteed significantly higher preservation of AA in both cultivars than wrapping in film with immersing in water. Washing in ozone-added water showed influence only on AA content in ‘Rialto’ leaves wrapped in film – they showed lower concentration of AA under simulated retail conditions. Our study showed that the content of AA in parsley leaves was cultivar dependent. Ozone treatment did not have negative effect on AA during the storage. Storage duration, rather than packaging methods, plays a key role in preservation of high content of AA. However, method of packaging is important under retail conditions, where temperature is higher and RH is much lower, than at a cold room.

APA, Harvard, Vancouver, ISO, and other styles

Jeon, Jongseon, Sangchul Lee, Haksoo Kim, Byoungsub Han, and Wisoo Kim. "Development of Nuclear Facilities Piping Cleaning System Using Microbubble." In ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2011. http://dx.doi.org/10.1115/icem2011-59070.

Full text

Abstract:

It removes radioactive sludge and corrosion products deposited on the inner walls of the pipes and valves in replacement or decommission, upon termination of life time, of nuclear power plant or nuclear facility. It lowers a cost of waste treatments taking advantage of a reduction of quantity of radioactive wastes by treating in classification of the radioactive wastes whose activities are lower than legal standards. The cleaning or decontamination methods developed until now have induced a damage on systems while being operated. A decontamination has been restrained if it was difficult to access physically. We are in development of the cleaning technique for pipelines by utilizing micro-bubbles in order to improve an efficiency and to prevent from any damage of systems. It aims to conduct a decontamination for spaces difficult to access there by applying cavitation phenomenon that is generated in collapse of micro-bubbles. In order to improve an efficiency of the micro-bubble device, the experimental conditions suitable to decontamination have been established and the auxiliary equipments have been added. The generation conditions and characteristics of micro-bubbles have been demonstrated by adjusting pHs and temperatures of cleaning solution. A decontamination effect has been confirmed by adding up an electrolytic method and ozone into micro-bubbles.

APA, Harvard, Vancouver, ISO, and other styles

Mitsugi, Fumiaki, Kazuhiro Nagahama, Noriko Horibe, and Shin-ichi Aoqui. "Ozone treatment of soil." In 2017 International Conference on Electromagnetic Devices and Processes in Environment Protection with Seminar Applications of Superconductors (ELMECO & AoS). IEEE, 2017. http://dx.doi.org/10.1109/elmeco.2017.8267742.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Rodrigues, Sueli, Thatyane Vidal Fonteles, Ronnyely Braz Reis Do Nascimento, and Fabiano Andre Narciso Fernandes. "Effects of ozone pretreatment on drying kinetics and quality of Granny Smith Apple dried in a fluidized bed dryer." In 21st International Drying Symposium. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/ids2018.2018.7460.

Full text

Abstract:

Fluidized bed drying is a method for controlled and mild drying of wetThis study aimed to evaluate the effects of ozone pretreatment on drying of green apple carried out in a fluidized bed dryer to determine drying kinetics and identify operating parameters for improved product quality. Results reveal that drying temperature in different levels affected water diffusivity and retention of bioactive compounds. The ozone pretreatment showed unexpected results since the pretreatment reduced the water difusivity and promoted an increase in the enzyme activity. The treatment time strongly afftected the final polyphenoloxidase and peroxidase activities. On the other hand, the ozone treatment resulted in lower color changes compared to non-ozone treated dried apples.Keywords: diffusivity; polyphenoloxidase; enzymatic browning; ozone.

APA, Harvard, Vancouver, ISO, and other styles

Yin, Jun, Yu-Xin Zhao, Lei Liu, Jian-Han Wang, and Ying-Zi Lin. "Sludge Treatment by Hydrogen Peroxide/Ozone." In 2008 2nd International Conference on Bioinformatics and Biomedical Engineering (ICBBE '08). IEEE, 2008. http://dx.doi.org/10.1109/icbbe.2008.562.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Chen, Shu-Fang, Ching-Yu Chang, and Yao-Ching Ku. "Resist residue removal using UV ozone treatment." In SPIE Advanced Lithography, edited by Robert D. Allen. SPIE, 2010. http://dx.doi.org/10.1117/12.849449.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Lackey, L. W., and R. O. Mines. "Ozone Treatment of Acid Yellow 17 Dye." In World Water and Environmental Resources Congress 2004. Reston, VA: American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40737(2004)340.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Pawlat, Joanna, Karol Hensel, Akira Mizuno, and Chobei Yamabe. "Cylindrical Foaming Reactor: Electrical Discharge in Foam Bubbles." In International Joint Power Generation Conference collocated with TurboExpo 2003. ASMEDC, 2003. http://dx.doi.org/10.1115/ijpgc2003-40163.

Full text

Abstract:

The method of generation of hydroxyl peroxide and ozone using the cylindrical foaming apparatus are presented in this paper. High concentration of H2O2 and low concentration of ozone were obtained as a result of the electrical discharge in humid foam environment. Despite of the small amount of required liquid, this system could be applied not only for polluted gas treatment but also for specific type of water and wastewater purification.

APA, Harvard, Vancouver, ISO, and other styles

Nagatomo, Takuya, Keisuke Takigawa, Yuki Yamasaki, Takamasa Sakai, Fumiaki Mitsugi, Tomoaki Ikegami, Kenji Ebihara, and Kazuhiro Nagahama. "Influence of Ozone Treatment on Soil Nutrient and Acidity with Low Ozone Dose Rate." In 2014 IIAI 3rd International Conference on Advanced Applied Informatics (IIAIAAI). IEEE, 2014. http://dx.doi.org/10.1109/iiai-aai.2014.40.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Ozone treatments"

Klasson, KT. OZONE TREATMENT OF SOLUBLE ORGANICS IN PRODUCED WATER. Office of Scientific and Technical Information (OSTI), March 2002. http://dx.doi.org/10.2172/814273.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Klasson, KT. OZONE TREATMENT OF SOLUBLE ORGANICS IN PRODUCED WATER (FEAC307). Office of Scientific and Technical Information (OSTI), March 2001. http://dx.doi.org/10.2172/814303.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Judeikis, Henry, and Melvin Hill. Treatment of Organic Hazardous Wastes with Ozone and Ultraviolet Radiation. Fort Belvoir, VA: Defense Technical Information Center, July 1991. http://dx.doi.org/10.21236/ada252799.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Cline, J. E., P. F. Sullivan, M. A. Lovejoy, J. Collier, and C. D. Adams. Ozone/UV treatment to enhance biodegradation of surfactants in industrial wastewater. CRADA final report. Office of Scientific and Technical Information (OSTI), October 1996. http://dx.doi.org/10.2172/666205.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Vangelas, K. M. SRS Data Report for Lynntech Soil Ozone Treatment Demonstration Adjacent to the 321-M Solvent Storage Tank Pad. Office of Scientific and Technical Information (OSTI), August 2000. http://dx.doi.org/10.2172/761646.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!