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Journal articles on the topic 'ULTRASONIC PRE-TREATMENT'

Author: Grafiati
Published: 11 September 2023
Last updated: 31 July 2025

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1

Zhang, Guangming, Huanzhi Liu, Panyue Zhang, and Ying Zhang. "Ultrasonic pre-treatment of biosolid." International Journal of Biotechnology 10, no. 1 (2008): 26. http://dx.doi.org/10.1504/ijbt.2008.017967.

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2

(Hans) van Leeuwen, J., Beril Akin, Samir Kumar Khanal, Shihwu Sung, David Grewell, and J. (Hans) van Leeuwen. "Ultrasound pre-treatment of waste activated sludge." Water Supply 6, no. 6 (2006): 35–42. http://dx.doi.org/10.2166/ws.2006.962.

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Waste activated sludge (WAS) is more difficult to digest than primary sludge due to rate limiting cell hydrolysis. High-power ultrasound can effectively disintegrate the bacterial cells and thus enhance the subsequent digestion. This research examines the effectiveness of ultrasound pretreatment on WAS disintegration at different specific energy inputs, ultrasonic densities and total solids (TS) contents. The results show that the cut diameter (d50) for WAS with 2% TS content declined nearly 6.5-fold at an ultrasonic density of 0.67 W/ml. For higher TS contents of 4 and 6%, higher densities of
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3

Blume, Torben, and Uwe Neis. "Improved wastewater disinfection by ultrasonic pre-treatment." Ultrasonics Sonochemistry 11, no. 5 (2004): 333–36. http://dx.doi.org/10.1016/s1350-4177(03)00156-1.

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4

Schweitz, Kasper O., Ralf B. Schou-Jensen, and Svend S. Eskildsen. "Ultrasonic pre-treatment for enhanced diamond nucleation." Diamond and Related Materials 5, no. 3-5 (1996): 206–10. http://dx.doi.org/10.1016/0925-9635(95)00499-8.

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5

Cao, Liang. "Research on Column Flotation of Sliming Molybdenum Tailings Using Ultrasonic Pre-Treatment." Applied Mechanics and Materials 628 (September 2014): 354–59. http://dx.doi.org/10.4028/www.scientific.net/amm.628.354.

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In this paper, for the re-concentration of sliming molybdenum Tailings in Henan Province, a multi-parameter test is carried out using orthogonal method in the column flotation system with the ultrasonic pre-treatment. Two groups’ optimum parameters of ultrasonic pre-treatment are acquired through the analysis of orthogonal test results. In addition,those two groups parameters are selected to verify the test results. Furthermore, the impact of ultrasonic pre-treatment on the floatability of mineral are defined by comparison tests. All the tests show that ultrasonic pre-treatment promotes the fl
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6

Tigunova, O. O. "ULTRASONIC DISINTEGRATION OF LIGNOCELLULOSE RAW MATERIALS AS A PRE-TREATMENT OF A SUBSTRATE FOR MICROBIOLOGICAL PRODUCTION OF BIOBUTANOL." Biotechnologia Acta 14, no. 5 (2021): 49–55. http://dx.doi.org/10.15407/biotech14.05.049.

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Aim. The purpose of the study was to investigate the effect of ultrasonic disintegration on the lignocellulosic raw materials (biomass of the non-cereal part of rape) with its subsequent use as a substrate for the production of biobutanol. Methods. Butanol-producing strains and the biomass of the non-cereal part of rape Brassica napus were used in the present study. Ultrasonic disintegration of lignocellulosic raw materials was performed on the specially designed equipment. Results. The effect of ultrasonic disintegration on lignocellulosic raw materials was investigated for further applicatio
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7

Wahab, Izzati Binti Mohamad Abdul, and Yin Fong Yeong. "Effect of Ultrasonic Pre-Treatment Durations on the Formation of Zeolite-T." Applied Mechanics and Materials 625 (September 2014): 911–15. http://dx.doi.org/10.4028/www.scientific.net/amm.625.911.

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In the present work, the lengthy synthesis duration of zeolite-T was successfully reduced by inducing the ultrasonic pre-treatment method prior to hydrothermal growth. The effect of ultrasonic pre-treatment durations on the formation of zeolite-T was investigated. The structure and morphology of the resultant samples were characterized by FTIR, XRD and FESEM. As verified by FTIR, samples produced using synthesis durations of 5, 4, 3 and 2 days with ultrasonic pre-treatment durations of 60 min and 90 min, respectively, demonstrated zeolite-T structure. One day synthesis duration was not suffici
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8

Rubanik, Vasili V., Vasili V. Rubanik Jr., Vyacheslav Dorodeiko, and Svetlana Miliukina. "Influence of Ultrasonic Treatment on Shape Memory Effects in Ti-50,4at.%Ni Alloy." Materials Science Forum 738-739 (January 2013): 362–66. http://dx.doi.org/10.4028/www.scientific.net/msf.738-739.362.

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In the present study we investigate the effect of ultrasonic treatment on the functional properties of Ti 50,4at.%Ni alloy after the processing in free and pre-deformed conditions. It is shown that the shape memory effect and its realization peculiarities depend on the parameters and conditions of ultrasonic influence. Ultrasonic treatment of preliminary deformed TiNi alloy in pre-deforming conditions promotes the reduction of strain restoring at the subsequent heating through the temperature interval of reverse martensite transformation. I. e. some setting of induced strain occurs during the
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9

Jin, Xin, Zi Fu Li, Xin Zhao, Lan Lan Xie, and Ting Ting Wang. "Effect of Ultrasound Pre-Treatment on Ultraviolet Disinfection in Controlling Bacterial Photoreactivation." Advanced Materials Research 347-353 (October 2011): 2369–74. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.2369.

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The main objective of the study is to explore how ultrasonic work with ultraviolet, in an attempt to find out the synergistic effect in controlling the phenomenon of microbial photoreactivation, as well as to analyse the feasibility of synergistic disinfection and related theories. Two different frequencies of ultrasonic transducers (28/40kHz)were used in combination with ultraviolet for secondary effluent disinfection. By controlling the process parameters that may contribute to the efficiency of synergistic disinfection, such as different reaction time, respective ultrasonic and ultraviolet
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10

Tan, Jiang Yue. "Studies on Pre-Treatment of Wastewater Containing Nitroaromatic Compound by Ultrasonic Cavitation." Advanced Materials Research 518-523 (May 2012): 2213–17. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.2213.

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In this paper, ultrasonic cavitation degradation was applied to treat the wastewater containing nitroaromatic compound. The factors influence to treatment effect such as the ultrasonic power and frequency, the wastewater initial pH value, were investigated by experiment. The experimental results showed that air-blasting in ultrasonic cavitation treatment could effectively improve treatment effect. The wastewater（COD:2650 mg•L-1,BOD5:240 mg•L-1，p-nitroaniline：490 mg•L-1，nitrobenzene:100 mg•L-1）was treated by ultrasonic cavitation degradation, the removal rate of p-nitroaniline,nitrobenzene and
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11

Appels, Lise, Sofie Houtmeyers, Floriaan Van Mechelen, Jan Degrève, Jan Van Impe, and Raf Dewil. "Effects of ultrasonic pre-treatment on sludge characteristics and anaerobic digestion." Water Science and Technology 66, no. 11 (2012): 2284–90. http://dx.doi.org/10.2166/wst.2012.415.

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In this work, the influence of an ultrasonic pre-treatment on anaerobic digestion of waste activated sludge is studied. Attention is paid to the solubilisation of the main organic (proteins, carbohydrates) and inorganic (heavy metals) sludge components during ultrasonic treatment and the influence of the dry solids content (DS) on the degree of solubilisation. The second part of the paper focuses on the relationship between the applied specific energy of the ultrasonic treatment and methane production. In general, a higher specific energy and a higher DS content are beneficial for the release
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12

Wahid, Khairul Anuar, Irfan Abdul Rahim, Syafiqah Nur Azrie Safri, and Ahmad Hamdan Ariffin. "Synthesis of ZnO Nanorods at Very Low Temperatures Using Ultrasonically Pre-Treated Growth Solution." Processes 11, no. 3 (2023): 708. http://dx.doi.org/10.3390/pr11030708.

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This paper investigates how the pre-treatment of the growth solution with ultrasonic energy affects the annealing temperatures and the growth temperatures of zinc oxide (ZnO) nanorods. The ultrasonic pre-treatment of the growth solution resulted in the successful growth of ZnO nanorods at a very low annealing temperature of 40 °C. The size and density of ZnO nanorods were found to increase proportionally with the increasing duration of pre-ultrasonic treatment, as indicated by characterisations performed with a scanning electron microscope (SEM). At an annealing temperature of 40 °C, coupled w
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13

Kopparthi, Prasad, S. Balamurugan, and A. K. Mukherjee. "Effect of Ultrasonic Pre-treatment Time on Coal Flotation." International Journal of Coal Preparation and Utilization 40, no. 12 (2017): 807–23. http://dx.doi.org/10.1080/19392699.2017.1417268.

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14

S. Almukhtar, Riyadh, Asawer A. Alwasiti, and Mohammed T. Naser. "Enhancement of Biogas production and organic reduction of sludge by different pre-treatment processes." Iraqi Journal of Chemical and Petroleum Engineering 13, no. 1 (2012): 19–31. http://dx.doi.org/10.31699/ijcpe.2012.1.3.

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Anaerobic digestion (AD) is the most common process for dealing with primary and secondary wastewater sludge. In the present work, four pre-treatment methods (ultrasonic, chemical, thermal, and thermo-chemical) are investigated in Al-Rustumya Wastewater Treatment plant in order to find their effect on biogas production and volatile solid removal efficiency during anaerobic digestion.Two frequencies of ultrasonic wave were used 30 KHz and 50 KHz during the pre-treatment. Sodium hydroxide was added in different amounts to give three pH values of 9, 10 and 11 in chemical pre-treating processes. T
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15

Zhang, Dong, Xiaoshuai Li, Shuting Jia, et al. "A review: factors affecting excess sludge anaerobic digestion for volatile fatty acids production." Water Science and Technology 72, no. 5 (2015): 678–88. http://dx.doi.org/10.2166/wst.2015.280.

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This paper presents a review of methods that improve the production of volatile fatty acids (VFA) from excess sludge during the anaerobic digestion process. These methods are mainly divided into two approaches. The first approach is located in the pre-treatment methods, which change the properties of the substrates, such as thermal pre-treatment, alkaline pre-treatment, microwave pre-treatment and ultrasonic pre-treatment. The other approach is found in the fermentation process control methods, which influence the environment of anaerobic digestion for the production of VFA, such as pH, temper
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16

Zhang, Lijie, Xuemei Zong, Xiaoming Yuan, and Xiaolei Xing. "Effects of Polyurethane Substrate Pre-Treatment on Pulsed Cathodic Arc Deposited DLC Films." Coatings 10, no. 6 (2020): 545. http://dx.doi.org/10.3390/coatings10060545.

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Diamond-like carbon (DLC) films were deposited by means of pulsed cathodic arc deposition on pretreated polyurethane (PU) rubber substrates. Tetrachloroethylene was chosen as a dissolution method to remove the plasticizer added in the PU substrates. Scanning electron microscopy (SEM) and Raman spectroscopy were applied to observe and characterize the surface morphologies and compositions of the deposited films, respectively. The tribological behaviours of uncoated and coated rubbers were investigated with ring-on-disc tribo experiments under dry sliding conditions. The coefficients of friction
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17

Yeong, Yin Fong, S. Antikira Novichaka, Li Sze Lai, Kok Keong Lau, and Mohd Shariff Azmi. "Investigation of Ultrasonic Pretreatment on the Synthesis of Zeolite-T and its CO2 Adsorption Characteristics." Advanced Materials Research 970 (June 2014): 35–38. http://dx.doi.org/10.4028/www.scientific.net/amr.970.35.

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In the present work, ultrasonic pretreatment method was firstly introduced in synthesizing of zeolite-T. The effect of ultrasonic pre-treatment on the synthesis duration was investigated. The structure and morphology of the resulting zeolite-T were characterized using several analytical tools such as X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier transfer infrared spectroscopy (FTIR). The CO2adsorption characteristic of the resulting zeolite-T was determined using CO2physisorption analyzer. Results showed that by introducing ultrasonic pre-treatment, the crystallizatio
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18

Kang, Wenze, and Huijian Li. "Enhancement of flaky graphite cleaning by ultrasonic treatment." Royal Society Open Science 6, no. 12 (2019): 191160. http://dx.doi.org/10.1098/rsos.191160.

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In this study, the aim is to simplify the graphite cleaning process. In order to achieve flotation for graphite effectively, ultrasonic treatment was used as a pre-treatment technique. Flotation tests were conducted using different ultrasound power and ultrasonic treatment time. The influences of ultrasonic treatment on particle sizes, morphologies, wettability, the content of surface elements and on the flotation effect of flaky graphite were investigated. The results of ultrasonic treatment for graphite flotation were compared with the results of conventional flotation. The results showed th
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19

Gupta, Santosh K., J. Behari, and Kavindra Kr Kesari. "Low Frequencies Ultrasonic Treatment of Sludge." Asian Journal of Water, Environment and Pollution 3, no. 2 (2006): 101–5. http://dx.doi.org/10.3233/ajw-2006-3_2_16.

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In the present investigation, ultrasonic (US) irradiation treatment technology has been adopted. The mechanism of action (cavitation and sonochemical reaction) of ultrasonic radiation is such that it acts as a potential tool for enhanced biodegradation and sonodegradation of waste and also recovery of resources from treated waste. In ultrasonic waste treatment technology the frequency of US and treatment time is a significant factor in determining optimal reaction conditions. The optimum frequency is substrate specific and low frequency is suitable for sewage sludge treatment. So we opted low
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20

Filibeli, Ayse, Gulbin Erden, and Cimen Gunduz. "ULTRASONIC PRE-TREATMENT OF WASTEWATER SLUDGE FROM A MEAT PROCESSING INDUSTRY." Brazilian Journal of Chemical Engineering 35, no. 3 (2018): 909–18. http://dx.doi.org/10.1590/0104-6632.20180353s20170156.

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21

Alfonso-Muniozguren, Pello, Cristian Ferreiro, Elodie Richard, Madeleine Bussemaker, José Ignacio Lombraña, and Judy Lee. "Analysis of ultrasonic pre-treatment for the ozonation of humic acids." Ultrasonics Sonochemistry 71 (March 2021): 105359. http://dx.doi.org/10.1016/j.ultsonch.2020.105359.

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22

Chu, C. "“Weak” ultrasonic pre-treatment on anaerobic digestion of flocculated activated biosolids." Water Research 36, no. 11 (2002): 2681–88. http://dx.doi.org/10.1016/s0043-1354(01)00515-2.

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23

Liao, Youpeng, Guanfei Zhao, Bo Feng, et al. "Application of ultrasonic pre-treatment for flotation separation pyrrhotite from chlorite." Colloids and Surfaces A: Physicochemical and Engineering Aspects 669 (July 2023): 131507. http://dx.doi.org/10.1016/j.colsurfa.2023.131507.

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24

Jing-dongYang and Shou-hong Ji. "Study on cooperative treatment of natural gas pipeline cleaning wastewater and membrane module." IOP Conference Series: Earth and Environmental Science 1011, no. 1 (2022): 012025. http://dx.doi.org/10.1088/1755-1315/1011/1/012025.

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Abstract Membrane module and pigging wastewater are common pollutants in natural gas transmission process. The treatment of these pollutants is difficult. In this paper, ultrasonic (US), persulfate (PS) and ultrasonic coupled persulfate were used to degrade organic matter in natural gas cleaning wastewater. The effects of pH, initial PS concentration, ultrasonic power, PS dosing batch and other factors on chemical oxygen demand (COD) degradation efficiency of pigging wastewater were investigated. The experimental results show that the optimal treatment effect can be obtained when the dosage of
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25

Karlović, Sven, Filip Dujmić, Suzana Rimac Brnčić, et al. "Mathematical Modeling and Optimization of Ultrasonic Pre-Treatment for Drying of Pumpkin (Cucurbita moschata)." Processes 11, no. 2 (2023): 469. http://dx.doi.org/10.3390/pr11020469.

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Innovations in food drying processes are usually aimed at reducing drying time and improving the overall properties of dried products. These are important issues from an economic and environmental point of view and can contribute to the sustainability of the whole process. In this study, the effects of ultrasonic treatment on the drying kinetics of pumpkin pulp are investigated, and mathematical models to predict the drying kinetics are analyzed and optimized. The results show that ultrasonic pretreatment significantly reduces drying time from 451 to 268 min, with optimal processing parameters
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Khramtsova, Aleksandra P., Valery Yu Prokof’ev, Natalya E. Gordina, Darya S. Cherednikova, and Ekaterina M. Konstantinova. "THERMAL BEHAVIOR OF MIXTURE BASED ON METAKAOLIN FOR LTA ZEOLITE SYNTHE-SIS: EFFECT OF ULTRASONIC TREATMENT." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 62, no. 2 (2019): 65–71. http://dx.doi.org/10.6060/ivkkt.20196202.5702.

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A study of the influence of ultrasonic treatment on the kinetics of solid-phase interaction of metakaolin with the sodium hydroxide was performed. Reflections corresponding to the zeolite LTA were observed on X-ray patterns according to phase analysis before calcination at 500 °C for the sample without pre-treatment. The appearance of a new phase of sodium alumosilicate (Na6Al4Si4O17) was observed with increasing temperature to 700 °C. The reflections of sodium aluminosilicate (Na8Al4Si4O18) and nepheline were detected on the X-ray pattern when the temperature calcination 800 °C besides to the
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27

Gong, Chang Xiu, and Jian Guo Jiang. "Ultrasound Coupled with Fenton Oxidation Pre-Treatment of Sludge to Release Organic Carbon, Nitrogen and Phosphorus." Applied Mechanics and Materials 768 (June 2015): 506–14. http://dx.doi.org/10.4028/www.scientific.net/amm.768.506.

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We focused on the effects of ultrasound and Fenton reagent in ultrasonic coupling Fenton oxidation (U+F) pre-treatment processes on the disintegration of wastewater treatment plant sludge. The results demonstrated that U+F treatment could significantly increase SCOD, TOC, total N, proteins, total P and PO43- concentrations in sludge supernatant. This method was more effective than ultrasonic (U) or Fenton oxidation (F) treatment alone. U+F treatment increased the SCOD by 2.1-and 1.4-fold compared with U and F alone, respectively. U+F treatment increased the total N and P by 1.7-and 2.2-fold, r
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Li, Fayue, Jingfeng Liu, Longjiao Lv, Xiwei Mu, Yuting Ren, and Guocheng Zhu. "Roasting Extraction of Lithium from Fly Ash: A Study of Influential Parameters and Mechanisms." Applied Sciences 15, no. 3 (2025): 1280. https://doi.org/10.3390/app15031280.

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Fly ash consists of significant amounts of lithium, which is an essential resource for developing batteries. This study proposed an efficient method for extracting lithium from fly ash. First, we explored the parameters affecting the activation effect of sodium carbonate roasting and the leaching efficiency of lithium using acid leaching. Additionally, ultrasonic pre-treatment was applied to enhance activation. A further mechanism for the roasting extraction of lithium was symmetrically analyzed. The results showed that ultrasonic treatment at 200 W for 1 h under alkaline leaching conditions (
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29

Будько, О. В., О. О. Бутенко, В. Г. Хоменко, В. С. Твердохліб, В. З. Барсуков та О. В. Черниш. "ВИКОРИСТАННЯ УЛЬТРАЗВУКУ В ПРОЦЕСІ ВИГОТОВЛЕННЯ ЕЛЕКТРОПРОВІДНИХ ПОКРИТТІВ НА ОСНОВІ ВУГЛЕЦЕВИХ МАТЕРІАЛІВ". Bulletin of the Kyiv National University of Technologies and Design. Technical Science Series 148, № 4 (2021): 130–39. http://dx.doi.org/10.30857/1813-6796.2020.4.12.

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Development of the basics of technology for obtaining electrically conductive coatings using ultrasonic dispersion of carbon materials. Methods. The following methods were used in the work: ultrasonic dispersion of materials, optical microscopy, four-electrode method of measuring the electrical conductivity of coatings. The shielding effectiveness of materials was performed following ASTM D4935. The research results were processed using computer programs Microsoft office Excel and ImageJ. Results. The ultrasound treatment of carbon materials with a high specific surface area was performed. The
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Liu, Wei, Du Shu Huang, Na Wu, Ju Cheng Zhang, Ping Yi, and Jin Yang. "Determination of Organochlorine Pesticides in Saussurea Costus by Ultrasonic Extraction and Solid-Phase Microextraction Method." Advanced Materials Research 554-556 (July 2012): 1947–51. http://dx.doi.org/10.4028/www.scientific.net/amr.554-556.1947.

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Ultrasonic extraction and purification using solid-phase microextraction column for the determination of 7 types of organochlorine pesticides including α, β, γ, δ-BHC, 2,4 '-DDT, 4,4'-DDT and heptachlor from the Saussrrea cotus were investigated in this study. The pretreatment of Saussrrea cotus samples, the effect of different ultrasonic time on the extraction efficiency and the effect of different ratio of dichloromethane: petroleum ether on purification efficiency were studied. Results show that the satisfactory extraction conditions for pre-treatment process are: 30 minutes ultrasonic trea
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31

Liu, Hongbo, Xingkang Wang, Song Qin, et al. "Comprehensive role of thermal combined ultrasonic pre-treatment in sewage sludge disposal." Science of The Total Environment 789 (October 2021): 147862. http://dx.doi.org/10.1016/j.scitotenv.2021.147862.

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32

Loranger, E., A. Charles, and C. Daneault. "Effect of ultrasonic pre-treatment of thermomechanical pulp on hydrogen peroxide bleaching." IOP Conference Series: Materials Science and Engineering 42 (December 10, 2012): 012018. http://dx.doi.org/10.1088/1757-899x/42/1/012018.

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Wong, Yi Hang, Eamon Marcus T.-Z. Chew, Pey Yi Toh, and Lee Muei Chng. "Evaluation of Oil Palm Empty Fruit Bunch for Cellulose Production." IOP Conference Series: Earth and Environmental Science 945, no. 1 (2021): 012021. http://dx.doi.org/10.1088/1755-1315/945/1/012021.

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Abstract Oil palm empty fruit bunch (OPEFB) with a cellulose content of 39 wt% is a good promise to be an alternative lignocellulosic feedstock for cellulose production through environmentally friendly extraction process. Therefore, this research was aimed to establish an effective cellulose extraction scheme from OPEFB via introduction of ultrasonication in the alkaline pulping stage for process intensification. The process could greatly reduce alkali solvent usage for cellulose extraction, hence alleviating the environmental impact caused by chemical disposal. Firstly, four distinct pre-trea
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Neczaj, E., and M. Kacprzak. "Ultrasound as a pre-oxidation for biological landfill leachate treatment." Water Science and Technology 55, no. 12 (2007): 175–79. http://dx.doi.org/10.2166/wst.2007.406.

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In this study, the effects of low energy ultrasound irradiation on landfill leachate treatment by means of sequencing bath reactor were investigated. The aim of this work was to estimate the influence of leachate irradiation time on aerobic treatment efficiency. The sonification of the leachate was carried out in static conditions using the disintegrator UD-20. The field frequency of 22 kHz (the power output equals to 180 W) and amplitude of 12 μm was applied. The sonification time was changed in the range of 30–140 s. It was found that ultrasonic pretreatment enhances the subsequent aerobic d
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35

Opalić, M., Z. Domitran, D. Komes, A. Belščak, D. Horžić, and D. Karlović. "The Effect of Ultrasound Pre-Treatment and Air-Drying on the Quality of Dried Apples." Czech Journal of Food Sciences 27, Special Issue 1 (2009): S297—S300. http://dx.doi.org/10.17221/606-cjfs.

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In order to develop environmentally sound, energy inexpensive and well scalable drying techniques that maintain high quality of dried fruit, optimisation of integrated process (ultrasound and air-drying) in the production of dried apples was conducted. Selected quality parameters of fresh and dried apples (variety Goldparmâne) resulting from different duration of ultrasonic pre-treatment and air-drying were compared. Sugars were determined spectrophotometrically using an enzymatic method. Content of total phenols and flavonoids was determined spectrophotometrically with the Folin-Ciocalteau as
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Amirhossein, Mahvi, Roodbari Aliakbar, Nabizadeh Nodehi Ramin, Naseri Simin, Dehghani Mohammadhadii, and Alimohammadi Mahmood. "Improvement of Landfill Leachate Biodegradability with Ultrasonic Process." E-Journal of Chemistry 9, no. 2 (2012): 766–71. http://dx.doi.org/10.1155/2012/820971.

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Leachate from mature landfills is typically characterized by high ammonium (NH4+) content, low biodegradability (low BOD5/COD ratio) and high fraction of refractory and large organic molecules such as humic and fulvic acids. Mature leachate effluents are known to contain recalcitrant and/or non-biodegradable organic substances and biological processes are not efficient in these cases. A promising alternative to complete oxidation of biorecalcitrant leachate is the use of ultrasonic process as pre-treatment to convert initially biorecalcitrant compounds to more readily biodegradable intermediat
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37

Wei, Na. "Effect of Ultrasonic Pretreatment for the Anaerobic Digestion of Sewage Sludge." Advanced Materials Research 531 (June 2012): 528–31. http://dx.doi.org/10.4028/www.scientific.net/amr.531.528.

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Anaerobic digestion is an economic and environmentally friendly technology for treating the biomass material-sewage sludge, but has some limitations, such as the low efficient biogass production. In this paper ultrasound was proposed as pre-treatment for effective sludge anaerobic digestion. Sludge anaerobic digestion experiments with ultrasonic pretreatment was investigated. It can be seen that this treatment effectively leaded to the increase of soluble chemical oxygen demand(SCOD) and volatile fatty acids(VFA)concentration. High concentration of VFA leaded to a increase in biogas production
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Shu, Kaiqian, Longhua Xu, Houqin Wu, et al. "Effects of ultrasonic pre-treatment on the flotation of ilmenite and collector adsorption." Minerals Engineering 137 (June 2019): 124–32. http://dx.doi.org/10.1016/j.mineng.2019.04.001.

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39

Zheng, Mingyue, Xiaohui Zhang, Peng Lu, et al. "Response surface methodology for the optimization of sludge solubilization by ultrasonic pre-treatment." IOP Conference Series: Earth and Environmental Science 113 (February 2018): 012177. http://dx.doi.org/10.1088/1755-1315/113/1/012177.

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Mao, Huazhen, Yong Chi, Fei Wang, et al. "Effect of Ultrasonic Pre-treatment on Dewaterability and Moisture Distribution in Sewage Sludge." Waste and Biomass Valorization 9, no. 2 (2017): 247–53. http://dx.doi.org/10.1007/s12649-016-9799-3.

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Erden, G., and A. Filibeli. "Ultrasonic pre-treatment of biological sludge: consequences for disintegration, anaerobic biodegradability, and filterability." Journal of Chemical Technology & Biotechnology 85, no. 1 (2010): 145–50. http://dx.doi.org/10.1002/jctb.2298.

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Eitzen, Lars, Aki Sebastian Ruhl, and Martin Jekel. "Particle Size and Pre-Treatment Effects on Polystyrene Microplastic Settlement in Water: Implications for Environmental Behavior and Ecotoxicological Tests." Water 12, no. 12 (2020): 3436. http://dx.doi.org/10.3390/w12123436.

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Microplastic (MP) particle dispersions used in many recent publications covering adsorption or toxicological studies are not characterized very well. The size distribution of polydisperse dispersions is highly dependent on the agglomeration processes and influences experimental outcomes. Therefore, pre-treatment is a prerequisite for reproducibility. In this study, manual/automated shaking and ultrasonic treatment as different mechanical dispersion techniques were applied for the dispersion of cryomilled polystyrene (PS). Particle numbers and size distribution of dispersions were analyzed by a
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Zaytseva, Tatiana N., Marina Yu Gerasimenko, Inna S. Evstigneeva, and Oksanа M. Perfileva. "Promising technologies for pre-sterilization ultrasonic cleaning of medical devices for patient safety in physiotherapy and medical rehabilitation." Russian Journal of Physiotherapy, Balneology and Rehabilitation 22, no. 5 (2024): 329–44. http://dx.doi.org/10.17816/rjpbr627509.

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Intensive introduction of innovative technologies into practice in order to improve the effectiveness of treatment and diagnostic measures and reduce the negative impact on the human body nevertheless contributes to the emergence of adverse events directly related to the provision of medical care. In the complex of anti-epidemic measures aimed at eliminating infection in medical organisations, a major role belongs to the correct organisation and performance of pre-sterilisation cleaning of medical devices. Technologies of processing of medical devices and pre-sterilisation cleaning should be c
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Shimizu, Minako, Shigehiro Doi, Ayumu Nakashima, Takayuki Naito, and Takao Masaki. "N-terminal pro brain natriuretic peptide as a cardiac biomarker in Japanese hemodialysis patients." International Journal of Artificial Organs 41, no. 3 (2018): 135–43. http://dx.doi.org/10.1177/0391398817752294.

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Purpose: This study examined the clinical significance of N-terminal pro brain natriuretic peptide level as a cardiac marker in Japanese hemodialysis patients. Methods: This was a multicenter cross-sectional study involving 1428 Japanese hemodialysis patients. Ultrasonic cardiography data at post-hemodialysis were obtained from 395 patients. We examined whether serum N-terminal pro brain natriuretic peptide levels were associated with cardiac parameters and assessed cut-off values and investigated factors associated with a reduced ratio of N-terminal pro brain natriuretic peptide levels pre- a
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Ківа, О. В., та В. В. Грибініченко. "Дослідження впливу ультразвукової обробки води на проростання насіння цукрового буряку". Вісник Полтавської державної аграрної академії, № 4 (27 грудня 2013): 30–31. http://dx.doi.org/10.31210/visnyk2013.04.07.

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Були проведені експериментальні дослідження для визначення впливу попередньої ультразвукової обробки води на схожість та енерґію проростання насіння цук-рового буряка. Крім того проводились експеримента-льні дослідження із вивчення впливу тривалості уль-тразвукової обробки на енерґію проростання. Пода-ються результати проведених експериментальних випробувань та одержані характеристики процесу проростання насіння в звичайній воді з міського водо-гону та у воді, яку попередньо піддавали ультразву-ковій обробці, проводиться їх порівняльний аналіз.
 Experimental studies have been conducted to
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Rosalina, Rosalina, Ferry Ikhsandy, Agung Kurnia Yahya, and Hibrah Hibrah. "Pengaruh Eksitasi Gelombang Iradiasi Ultrasonik Terhadap Kadar Tanin pada Maserasi Biji Pinang Wangi." REACTOR: Journal of Research on Chemistry and Engineering 2, no. 2 (2021): 41. http://dx.doi.org/10.52759/reactor.v2i2.30.

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Nagari Sikucua, Kampung Dalam Subdistrict, Padang Pariaman produces nearly 800 tons of fragrant areca nut every year which is sent to Jambi to meet export needs. Areca nut contains tannins, substances that have many benefits, some of which are anti-inflammatory, corrosion inhibitors, antioxidants. This study aims to obtain tannins in areca nut extract through a kinetic maceration process with pre-treatment with ultrasonic irradiation wave. The dried areca nut was ground and sieved with various sizes of 20, 40 and 70 mesh and then extracted with ethanol as solvent. The concentration of ethanol
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Siahaan, I. N. J., A. E. Saputra, and E. F. Karamah. "The effects of Ozonation and ultrasonic cavitation on batik wastewater treatment with coagulation-flocculation as pre-treatment." IOP Conference Series: Materials Science and Engineering 1173, no. 1 (2021): 012016. http://dx.doi.org/10.1088/1757-899x/1173/1/012016.

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Wahid, Radziah, Maycoll Romero-Guiza, Verónica Moset, Henrik Bjarne Møller, and Belén Fernández. "Improved anaerobic biodegradability of wheat straw, solid cattle manure and solid slaughterhouse by alkali, ultrasonic and alkali-ultrasonic pre-treatment." Environmental Technology 41, no. 8 (2018): 997–1006. http://dx.doi.org/10.1080/09593330.2018.1516802.

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Kovalevskaya, Zhanna G., Vasilii A. Klimenov, I. M. Goncharenko, Yurii F. Ivanov, and N. S. Belousova. "Chromium Alloyed Steel Nitriding within Close-To-Critical Temperature Range." Advanced Materials Research 1013 (October 2014): 146–52. http://dx.doi.org/10.4028/www.scientific.net/amr.1013.146.

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The paper presents X-ray diffraction and scanning electron microscope analyses, and durometer measurements used to investigate the structural properties and phase composition of nitride layers of type 20Kh13 mild steel. A method of nitriding by low-pressure arc discharge was applied along with the combined surface treatment including ultrasonic finishing and nitriding. It was shown that within the close-to-critical temperature range starting from 200oС, the nitride layers was formed on the surface of type 20Kh13 mild steel. The ultrasonic pre-treatment shown its effect on the steel nitriding t
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Ye, Xiong Lin, You Li Zhu, and Dong Hu Zhang. "Effects of Ultrasonic Deep Rolling on Fatigue Performance of Pre-Corroded 7A52 Aluminum Alloy." Advanced Materials Research 189-193 (February 2011): 897–900. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.897.

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The effects of ultrasonic deep rolling (UDR) on the fatigue behavior of pre-corroded 7A52 aluminum alloys were investigated. By means of X-Ray diffraction stress measurements and scanning electron microscopy (SEM), residual stress and fractograph of 7A52 aluminum alloys with and without UDR treatment were analyzed. The results indicated that the UDR produced compressive residual stresses with depth approaching 1mm. UDR treatment can extend the fatigue life of the pre-corroded 7A52 specimens to a large extent, depending on the level of corrosion and UDR parameter. For the slightly corrode speci
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