Bibliografías temáticas / Solid-liquid separation with screens

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Literatura académica sobre el tema "Solid-liquid separation with screens"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 15 de febrero de 2022

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Artículos de revistas sobre el tema "Solid-liquid separation with screens"

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Akhiar, Afifi, Felipe Guilayn, Michel Torrijos, Audrey Battimelli, Abd Halim Shamsuddin, and Hélène Carrère. "Correlations between the Composition of Liquid Fraction of Full-Scale Digestates and Process Conditions." Energies 14, no. 4 (2021): 971. http://dx.doi.org/10.3390/en14040971.

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Fast development of centralized agricultural biogas plants leads to high amounts of digestate production. The treatment and disposal of liquid fractions after on-site digestate solid–liquid separation remains problematic due to their high organic, nutrient and aromatic contents. This work aims to study the variability of the remaining compounds in the digestate liquid fractions in relation to substrate origin, process parameters and solid–liquid separation techniques. Twenty-nine digestates from full-scale codigestion biogas plants and one waste activated sludge (WAS) digestate were collected and characterized. This study highlighted the combined effect of the solid–liquid separation process and the anaerobic digestion feedstock on the characteristics of liquid fractions of digestates. Two major clusters were found: (1) liquid fractions from high efficiency separation process equipment (e.g., centrifuge and others with addition of coagulant, flocculent or polymer) and (2) liquid fractions from low efficiency separation processes (e.g., screw press, vibrating screen and rotary drum), in this latter case, the concentration of chemical oxygen demand (COD) was associated with the proportion of cow manure and energy crops at biogas plant input. Finally, SUVA254, an indicator for aromatic molecule content and the stabilization of organic matter, was associated with the hydraulic retention time (HRT).
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Schmitt, Vivien, Matthieu Dufresne, Jose Vazquez, Martin Fischer, and Antoine Morin. "Separation efficiency of a hydrodynamic separator using a 3D computational fluid dynamics multiscale approach." Water Science and Technology 69, no. 5 (2014): 1067–73. http://dx.doi.org/10.2166/wst.2014.014.

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The aim of this study is to investigate the use of computational fluid dynamics (CFD) to predict the solid separation efficiency of a hydrodynamic separator. The numerical difficulty concerns the discretization of the geometry to simulate both the global behavior and the local phenomena that occur near the screen. In this context, a CFD multiscale approach was used: a global model (at the scale of the device) is used to observe the hydrodynamic behavior within the device; a local model (portion of the screen) is used to determine the local phenomena that occur near the screen. The Eulerian–Lagrangian approach was used to model the particle trajectories in both models. The global model shows the influence of the particles' characteristics on the trapping efficiency. A high density favors the sedimentation. In contrast, particles with small densities (1,040 kg/m3) are steered by the hydrodynamic behavior and can potentially be trapped by the separator. The use of the local model allows us to observe the particle trajectories near the screen. A comparison between two types of screens (perforated plate vs expanded metal) highlights the turbulent effects created by the shape of the screen.
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KANJO, Yoshinori, Atsuhiro HONDA, and Michinobu NISHITANI. "Study on the Solid-liquid Separation of Wastewater with a Rotating Drum Screen." Japan journal of water pollution research 13, no. 1 (1990): 39–47. http://dx.doi.org/10.2965/jswe1978.13.39.

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Trotman, A. A., C. E. Mortley, D. G. Mortley, P. P. David, and P. A. Loretan. "A COMPARATIVE STUDY OF HYDROPONIC SYSTEMS FOR GROWING PEANUT." HortScience 28, no. 4 (1993): 267C—267. http://dx.doi.org/10.21273/hortsci.28.4.267c.

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Hydroponic growing systems have the potential to maximize phytomass production of peanut (Arachis hypogea) for Controlled Ecological Life Support Systems (CELSS). Two greenhouse experiments were conducted with plant nutrients supplied in a modified Evan's solutionusing a nutrient film technique. The objective of this research was to determine the effect of hydroponic growing systems on pod and foliage yield of `New Improved Spanish' and `Georgia Red' peanut. Sub-objectives were to evaluate (i) the impact of channel size and (ii) the impact of gradation in pore size on the separation of the rooting zone from the zone of gynophore development. The treatments consisted in the first experiment of a wide channel (122 by 15 by 46 cm) fitted with a perforated (3.0mm diam.) PVC grid; a narrow channel (122 by 15 by 15 cm) either fitted with a perforated grid or without a grid. For 'New Improved Spanish' peanut dry foliage yield tended to be higher in the wide channel treatment (0.33 kg/sq m). But the narrow channel yielded the highest mean pod dry weight (0.12 kg/sq m). Pore sizes of the screens ranged from infinity (no screen). perforated grid, square mesh. filtering screen (75u) and solid screen (no pores). For `Georgia Red' peanut, the impact of gradation in pore size of screens was variable: pod number was highest with the filtering (food) screen (216/sq m) but pod dry weight was highest for the square mesh treatment (0.09 kg/sq m). Foliage yield was significantly greater for the filtering (food) screen (1.12 kg/sq m) than in any of the other treatments. The findings of the research indicate that use of screens is feasible and will not retard pod development. The presence of a perforated grid tended to result in lower phytomass production for `New Improved Spanish' peanut.
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Fedoliak, N. V., М. М. Liakh, and V. V. Mykhayliv. "The analysis of factors influencing the trajectory of the vibrating screen." Prospecting and Development of Oil and Gas Fields, no. 3(76) (September 27, 2020): 61–70. http://dx.doi.org/10.31471/1993-9973-2020-3(76)-61-70.

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Due to the fact that the shape of the trajectory of the sieve vibrating screen significantly affects the efficiency of cleaning the drilling mud from the drilled rock, this article identifies and analyzes the factors influencing the formation of the trajectory of the sieve. The study of the nature of the motion of the particles of the drilled rock is carried out. The motion-equation of the point of the jigging frame, respectively, and a certain section of the screen can be described by an non-homogeneous second-order differential equation (Newton equation). The equation of the trajectory of the jigging frame is also considered. The influence of the amount of drilling mud, which is on the vibrating screen at a certain time-point, on the trajectory is taken into account in this equation. The drilling mud complex system consisting of liquid and solid fractions – sludge, sand and sludge – is taken into account. In this case, the fluid and clay move without separation from the sieve, and sludge and coagulated clay – with separation from the transport surface. Depending on the position on the sieve, each component of the drilling mud at different time periods moves with different trajectories and different other variable parameters along the length of the sieve. Therefore, the main purpose of the research is to obtain a graphical real trajectory of the selected point of the jigging frame of vibrating screens, to compare it with theoretical graphical dependences and to establish parameters that affect the change in the amplitude of jogging frame vibrations in real operating conditions. The coverage of the problem and the main results of the research are performed in real conditions (when vibrating screens work on the drilling rigs). The research is performed using simple recording devices installed at six places – on the left and right sides of the jigging frame above the front and rear shock absorbing springs, and in the center of stuff – between springs. All the real trajectories of certain points of the jigging frame and screen can be described using certain Lissajous figures. However, it was found that not all trajectories coincide completely with the classic Lissajous figures, because the trajectory is influenced by external factors that cause chaotic motion of the jigging frame – the Sommerfeld effect, as well as non-uniformity of drilling fluid delivery. The nature of the movement of the vibrating plane - the screen - is also affected by the rigidity of the vibrating support, including the entire structure of the vibrating screens. The phenomenon of resonance is possible in the area of ​​vibration supports. In addition, it was previously established that the trajectory of the point of a certain area of ​​the screen is a spatial figure that requires additional theoretical and experimental studies. When moving the drilling fluid on the sieve with the toss, the cleaning efficiency will be much higher due to the increase in vibration force. Based on the analysis of the results of the factors influencing the trajectory of the sieve, preliminary recommendations are given for the correct adjustment of the vibrating screen.
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McCallum, Jason L., Jennifer N. D. Vacon, and Christopher W. Kirby. "Ultra-Micro-Scale-Fractionation (UMSF) as a Powerful Tool for Bioactive Molecules Discovery." Molecules 25, no. 16 (2020): 3677. http://dx.doi.org/10.3390/molecules25163677.

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Herein is detailed the development and validation of an ultra-micro-scale-fractionation (UMSF) technique for the discovery of plant-based, bioactive molecules, coupling the advantages of ultra-performance liquid chromatography mass spectrometry (UPLC-MS) separations with microtiter plate-based bioassay screens. This novel one-step approach simultaneously uses UPLC to collect chemical profile information, while performing high-resolution fractionation, greatly improving workflow compared to methods relying on high-performance liquid chromatography (HPLC), solid phase extraction or flash systems for chromatographic separations. Using the UMSF technique, researchers are able to utilize smaller quantities of starting materials, reduce solvent consumption during fractionation, reduce laborious solvent dry down times, replace costly single-use solid-phase-extraction cartridges with reusable analytical-sale UPLC columns, reduce fractionation times to less than 10 min, while simultaneously generating chemical profile data of active fractions and enjoying superior chromatographic resolution. Using this technique, individual bioactive components can be readily purified, identified, and bioassayed in one step from crude extracts, thereby eliminating ambiguous synergistic effects often reported in plant-based natural products research. A successful case-study is presented illustrating the versatility of this technique in identifying lupulone as the principal cytotoxic component from hops (Humulus lupulus L.), using a brine shrimp (Artemia franciscana) model. These results confirm and expand upon previous cell-based bioassay studies using a more complex, multicellular organism, and add to our understanding of structure-function activity relationships for secondary metabolites in hops and the Cannabaceae plant family.
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Furuhashi, Kenichi, Fumio Hasegawa, Manabu Yamauchi, Yutaka Kaizu, and Kenji Imou. "Improving the Energy Balance of Hydrocarbon Production Using an Inclined Solid–Liquid Separator with a Wedge-Wire Screen and Easy Hydrocarbon Recovery from Botryococcus braunii." Energies 13, no. 16 (2020): 4139. http://dx.doi.org/10.3390/en13164139.

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The green colonial microalga Botryococcus braunii produces large amounts of hydrocarbons and has attracted attention as a potential source of biofuel. When this freshwater microalga is cultured in a brackish medium, the hydrocarbon recovery rate increases; furthermore, the colony size becomes large. In this study, the effects of such changes on the energy balance of harvesting and hydrocarbon recovery were studied via filtrate experiments on an inclined separator and extraction from a concentrated slurry. The inclined separator was effective for harvesting large-colony-forming algae. The water content on the wire screen of slit sizes larger than 150 µm was <80% and a separation rate of >85% could be achieved. The input energy of the harvesting using the brackish medium with this separator was ≈44% of that using the freshwater medium with vacuum filtration, while the input energy of the hydrocarbon recovery using the brackish medium was ≈88% of that using the freshwater medium with pre-heating before n-hexane extraction. Furthermore, the energy profit ratio of the process in the brackish medium was 2.92, which was ≈1.2 times higher than that in the freshwater medium. This study demonstrated that filtration techniques and hydrocarbon recovery from B. braunii with a low energy input through culture in a brackish medium are viable.
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Pelevin, Aleksei, and Nikolai Sytykh. "The features of classification in hydrocyclones in the course of titanium magnetite ore grinding." Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal, no. 1 (February 17, 2021): 74–84. http://dx.doi.org/10.21440/0536-1028-2021-1-74-84.

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Research aim is to assess the use of hydrocyclones in the closed circuit of the second stage of grinding for the conditions of EVRAZ KGOK dressing mill. Methodology. Industrial tests were carried out under various solid phase capacities of two hydrocyclones GTs-710. Industrial testing results and their discussion. Increase in the content of solid and –71 µm class in the feed of the hydrocyclone results in discharge output increase. Decrease in the content of solid and increase in the content of –71 µm class result in the increased content of –71 µm class in the discharge. When increasing the content of solid in the feed of the hydrocyclone, the extraction of all size classes into the discharge of the hydrocyclone increases. At the same time the efficiency of classification by –71 µm class reduces. 84 "Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal". No. 1. 2021 ISSN 0536-1028 Iron content values in hydrocyclone discharge and sand. The classifying hydrocyclone partially separates by density resulting in different content values of iron in discharge and sand. Under pulp high density, the content of iron in the discharge is higher than that of iron in sand. Under low density of feed pulp, there is less iron in the discharge, compared to that in sand; that is due to small particles of titanium magnetite entering the sand. Summary. The indicators of separation by size in hydrocyclone are significantly affected by the content of solid and –71 µm class in the feed. The drawback of the hydrocyclone is partial separation by density (in iron) which results in overgrinding of titanium magnetite in the closed circuit of grinding and higher losses in subsequent procedures of wet magnetic separation. The technologies which make it possible to reduce overgrinding of titanium magnetite in the closed circuit of grinding are as follows: automatic control system for classification in the hydrocyclone, the use of hydraulic screens instead of hydrocyclones, and multi-stage dressing.
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Sutter, Daniel, Matteo Gazzani, and Marco Mazzotti. "A low-energy chilled ammonia process exploiting controlled solid formation for post-combustion CO2capture." Faraday Discussions 192 (2016): 59–83. http://dx.doi.org/10.1039/c6fd00044d.

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A new ammonia-based process for CO<sub>2</sub>capture from flue gas has been developed, which utilizes the formation of solid ammonium bicarbonate to increase the CO<sub>2</sub>concentration in the regeneration section of the process. Precipitation, separation, and dissolution of the solid phase are realized in a dedicated process section, while the packed absorption and desorption columns remain free of solids. Additionally, the CO<sub>2</sub>wash section applies solid formation to enable a reduction of the wash water consumption. A rigorous performance assessment employing the SPECCA index (Specific Primary Energy Consumption for CO<sub>2</sub>Avoided) has been implemented to allow for a comparison of the overall energy penalty between the new process and a standard ammonia-based capture process without solid formation. A thorough understanding of the relevant solid–solid–liquid–vapor phase equilibria and an accurate modeling of them have enabled the synthesis of the process, and have inspired the development of the optimization algorithm used to screen a wide range of operating conditions in equilibrium-based process simulations. Under the assumptions on which the analysis is based, the new process with controlled solid formation achieved a SPECCA of 2.43 MJ kg<sub>CO2</sub><sup>−1</sup>, corresponding to a reduction of 17% compared to the process without solid formation (with a SPECCA of 2.93 MJ kg<sub>CO2</sub><sup>−1</sup>). Ways forward to confirm this significant improvement, and to increase the accuracy of the optimization are also discussed.
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Grickus, Armands, and Sharif Guseynov. "ON A MATHEMATICAL MODEL DESCRIBING OPTIMAL PROCESSING MECHANISM OF DISPERSED GRANULAR MATERIALS IN GRAVITATIONAL FLOW WITH HORIZONTAL OR INCLINED VIBRATING SIEVE CLASSIFYING SCREENS." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 3 (June 15, 2017): 69. http://dx.doi.org/10.17770/etr2017vol3.2547.

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The investigation of motion and gravitational processing of disperse granular materials is very important for solution of a wide spectrum of technological processes, including the chemical technology of treatment (with or without the decoration-compression procedure) of granular mineral fertilizers and their drying and sorting/separation by means of vibrating sieve classifying screens, in particular. In this work, we have used the apparatus of the theory of continuous media for the mathematical modelling of dynamics of disperse granular materials, and by this we assume that a property of these materials is the distribution of a solid granular component inside of them. The elaborated mathematical model is based on the volume conservation law for granular components, on the momentum conservation law, as well as on the equations for stress tensor in the granular mineral fertilizers and equations for description of the Coulomb granular mineral fertilizers.
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Tesis sobre el tema "Solid-liquid separation with screens"

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Schmitt, Vivien. "Investigation expérimentale et numérique d'un ouvrage de séparation particulaire en assainissement." Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAD023/document.

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Dans le cadre de cette thèse, un ouvrage de type séparateur hydrodynamique est étudié pour répondre aux problématiques environnementales liées aux déversements de macro-déchets en mer. La première partie est destinée à l’analyse du fonctionnement hydraulique de l’ouvrage et son aptitude face au colmatage sur un pilote en laboratoire. Les données collectées vont ensuite permettre la validation d’une approche numérique capable de simuler l’écoulement. Cette technique est par la suite utilisée pour optimiser l’écoulement et la forme de la grille. Nous avons démontré, à partir de simulations numériques, l’intérêt d’une grille de type métal déployé pour obtenir des phénomènes d’agitations turbulentes et de gradient de pression important à l’amont de la grille. Ces phénomènes favoriseraient ainsi la dispersion des polluants et limiteraient les phénomènes de colmatage. La dernière partie de ce travail a été d’étudier le fonctionnement d’un ouvrage grandeur nature et d’observer son efficacité<br>The installation of hydraulic structures to separate particles is a key element to improve the quality of water bodies. This PhD work focus on the study of a hydrodynamic separator used to capture large wastes before their discharge into the see. Tangential separation mechanism along a screen is used in this device. The first part of the work consists in studying the hydraulic behavior and the clogging effectiveness of the device with laboratory experiments. A CFD multiscale approach was developed in this work to optimize the shape of the screen in order to avoid clogging. This method, validated against experimental data, allows us to predict that expanded metal stripes are useful to develop turbulence and pressure gradients upstream the screen. This hydrodynamic phenomenon favor particles and pollutants ejection near the apertures. The last part of the work was to study the hydrodynamic behavior and the real efficiency with in situ experiments
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Ortega-Rivas, Enrique. "Dimensionless scale-up of hydrocyclones for separation of concentrated suspensions." Thesis, University of Bradford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253983.

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Yuan, Huixin. "Hydrocyclones for the separation of yeast and protein particles." Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242214.

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Yawson, Selina Kuukuwa. "Dairy manure treatment using solid-liquid separation and microwave enhanced advanced oxidation process." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/29232.

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Dairy manure treatment, using solid-liquid separation and microwave enhanced advanced oxidation process (MW/H₂O₂-AOP), was investigated. The objectives of the research were to determine: 1) the nutrient and metal composition of solid and liquid fractions of raw dairy manure following solid-liquid separation, 2) the effects of MW/H₂O₂-AOP operating factors of temperature, hydrogen peroxide (H₂O₂) dosage, acid concentration and heating time on sugar production and nutrient release from solid dairy manure. Solid-liquid separation of raw dairy manure, using a 1mm laboratory sieve, showed that solid fractions had a higher composition of TS and volatile solids (VS), while the liquid fractions were richer in nutrients and metals. Laboratory separation by screening alone was not effective in removing high amounts of nutrients and solids from the raw manure. Screening experiments were conducted using cellulose fibers to study the effects of temperature, acid concentration, H₂O₂ dosage and heating time on sugar production, with the aim of applying the results to dairy manure lignocellulosic material. Sugar production increased when acid concentration was increased from 1% to 3%, but decreased with an increase to 10%. More sugar was produced at 160°C compared to 120°C. Sugar production decreased with increasing time. Microwave irradiation of solid dairy manure at pH 2, temperatures of 80, 120 and 160°C, H₂O₂ dosages of 0 to 0.50 mL, and heating times of 10 to 20 min, showed that more sugars were released at higher temperatures. Temperature and hydrogen peroxide dosage were identified as the most important factors affecting solubilization of phosphorus and ammonia. Subsequently, a two-stage acid hydrolysis process, using MW/H₂O₂-AOP, was used to investigate sugar production and solubilization of phosphorus and ammonia from solid dairy manure at: 3% acid concentration, 120 and 160°C, 0 and 2 mL H₂O₂ and heating times of 20 and 60min. To enhance sugar production from solid dairy manure, the microwave should be operated at higher temperatures and shorter heating times with no H₂O₂. For ammonia and phosphorus solubilization, higher temperatures and longer heating times, in the presence of H₂O₂, would be advantageous. MW/H₂O₂-AOP is therefore an efficient means for treating diary manure for nutrient recovery.
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Strandh, Jenny. "A study of solid and liquid inclusion separation at the steel-slag interface." Licentiate thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-307.

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Kholany, Mariam Achraf Mohamed Bahie El Din El. "Enantioselective separation of chiral compounds using aqueous biphasic systems and solid-liquid biphasic system." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22708.

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Mestrado em Biotecnologia - Industrial e Ambiental<br>Tipicamente, apenas um dos enantiómeros é responsável pelo efeito pretendido de um fármaco, sendo que o outro pode levar a respostas menos potentes ou até mesmo indesejadas. As entidades reguladoras praticam políticas restritas em relação à comercialização de fármacos como misturas racémicas. Assim, a indústria farmacêutica tem enfrentado desafios relacionados com o desenvolvimento de métodos para produção de fármacos oticamente puros. No entanto, e considerando a dificuldade acrescida na produção de enantiómeros puros por síntese direta, a síntese de misturas racémicas seguida da sua purificação surge como uma alternativa mais barata, simples e flexível. Os sistemas aquosos bifásicos (SABs) e os sistemas de duas fases sólida-líquida (SDFSL) são técnicas alternativas mais biocompatíveis que têm sido utilizados como técnicas de separação enantiosseletiva de fármacos e/ou aminoácidos com enantiosseletividades bastante promissoras. Para além disso, apresentam benefícios de custo, rapidez, simplicidade e versatilidade de operação e possibilidade de aumento de escala. Este trabalho foca-se no desenvolvimento de SABs e SDFSL constituídos por seletores quirais que possam atuar simultaneamente como solvente. Numa primeira abordagem o objetivo foi desenvolver novos SABs quirais, mais biocompatíveis, simples e eficientes. Para tal, SABs constituídos por açúcares, aminoácidos e líquidos iónicos quirais foram aplicados na resolução enantiomérica de ácido mandélico racémico. O sistema mais promissor, composto por [C1Qui][C1SO4] + K3PO4, obteve um excesso enantiomérico de -33.4%. Numa segunda abordagem, foi possível criar uma alternativa mais simples e mais eficiente recorrendo a SDFSL. Com estes sistemas, foi obtido o valor mais elevado de excesso enantiomérico deste trabalho, de 49.0%, através da precipitação enantiosseletiva do R-ácido mandélico por interação com [N4444][D-Phe].<br>Conventionally, only one of the enantiomers is responsible for the intended effect of a drug, whilst the other may lead to a less potent or even undesired response. Regulation entities are very strict regarding the commercialization of racemic drugs. Thus, pharmaceutical industry has been facing challenges related to the creation of methods to produce optically active drugs. However, considering the increased difficulty in the production of pure enantiomers by direct synthesis, the synthesis of racemic mixtures followed by their purification appears as a cheaper, simpler and more flexible alternative. Aqueous biphasic systems (ABS) and solid-liquid biphasic system (SLBS) are more biocompatible alternatives that have been used to separate racemic drugs and amino acids with promising enantioselectivities. Furthermore, these are cost-effective, quick, simple and operationally flexible. This work intended to develop ABS and SLBS using chiral selectors that can simultaneously act as solvents. In a first attempt, chiral ABS of better biocompatibility, simplicity and efficiency were developed. For that purpose, ABS constituted by sugars, amino acids and chiral ionic liquids (CILs) were applied for chiral resolution of racemic mandelic acid (MA). The most promising ABS was a system composed of [C1Qui][C1SO4] + K3PO4 which yielded the maximum enantiomeric excess of -33.4%. In a second approach, it was possible to create a simpler and more efficient technique resorting to SLBS. The enantiomeric excess value of 49.0% was achieved, by the enantioselective precipitation of the R-MA caused by interactions with [N4444][D-Phe].
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7

Bailey, Andrew Douglas. "An exploratory investigation of crossflow microfiltration for solid/liquid separation in biological wastewater treatment." Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/21915.

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This thesis contains the results and discussion of an exploratory investigation into the application of Crossflow Microfiltration (CFMF) for solid/liquid separation in biological wastewater treatment systems. The principal objective of the study was to assess the influence of CFMF on the performance of identified biological wastewater treatment systems. It was not the objective to optimise filtration performance. A literature review indicated that the crossflow mode of filtration has been widely accepted as a unit operation in the fermentation industry. The filtration mode is now being applied not only for solid/liquid separation but also for separations on a molecular and ionic level. Very few applications of crossflow filtration in the context of biological wastewater treatment solid/liquid separation are reported in the literature. The reasons for this limited experience would appear to be the scale involved and the perceived high costs; separations in the fermentation industry are usually conducted at relatively small scale (laboratory or pilot-scale) and involve high-value products, justifying high capital and operating costs. Also, the high level of separation performance attained is perhaps not necessary for many wastewater treatment applications. No doubt these reservations are largely valid. However, these arguments cannot be applied equally to all filtration methods and wastewater treatment schemes. For example, the costs of microfiltration are substantially less than ultrafiltration or reverse osmosis, and in certain cases effluents with extremely low suspended solids contents may be required. In the light of these observations an investigation of CFMF for solid/liquid separation in biological wastewater treatment systems appears justified. Two biological treatment systems were selected for study: the Upflow Anaerobic Sludge Bed (UASB) reactor and the Activated Sludge system. The envisaged benefits accruing from the application of CFMF were different in each case.
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8

Menon, Sreejit Rajiv Menon. "Design and Development of 2-Functionalized Calix[4]arenes and Their Investigation in the Separation of Lanthanides." University of Toledo / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1461715995.

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Adamcewicz, Justine E. "A study on the effects of dot gain, print contrast and tone reproduction as it relates to increased solid ink density on stochastically screened images verus conventionally screened images /." Online version of thesis, 1994. http://hdl.handle.net/1850/11989.

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Du, Toit Geoff J. G. "Design and performance of BNR activated sludge systems with flat sheet membranes for solid-liquid separation." Master's thesis, University of Cape Town, 2006. http://hdl.handle.net/11427/5061.

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Includes bibliographical references.<br>Wastewater treatment technologies have developed out of the need to protect receiving water bodies from the increasingly concentrated municipal and industrial waste streams generated through human activity. Of the methods available to clean wastewaters, biological nutrient removal (BNR) activated sludge (AS) is applied throughout South Africa and internationally as it has many advantages, notably it is cheaper to operate, does not introduce salinity into the water and is a simple and robust process. One of the key steps in the BNR AS process is the separation of biomass from the water. This is traditionally achieved by means of secondary settling tanks (SSTs), however recently the use of membranes for solid-liquid separation has gained popularity for the following reasons: Membranes are able to retain all solids and thus are insensitive to the settling characteristics of sludges, • they can be run at high concentrations and hence smaller reactor volumes are required, • membranes can produce a guaranteed high quality effluent free of pathogens and in some cases viruses too. • Additionally smaller reactor volumes and the obviation of SSTs allow a substantial wastewater treatment plant footprint reduction. Hence the combination of membranes in BNR AS is being increasingly applied. where much research has been conducted on the performance of membranes. The majority of the research has focused on the physical membrane performance, investigating the mechanisms of fouling, or on the membrane biological reactor (MBR) performance in removing organic compounds or nitrogen compounds from wastewater. There are however few case studies investigating BNR using membranes despite speculation that the inclusion of membranes may indeed affect the nature of the activated sludge biomass (Witzig et al., 2002).
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Libros sobre el tema "Solid-liquid separation with screens"

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Svarovsky, Ladislav. Solid-liquid separation processes and technology. Elsevier, 1985.

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Svarovsky, Ladislav. Solid-liquid separation processes and technology. Elsevier, 1985.

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S, Ward A., and Holdich R. G, eds. Solid-liquid filtration and separation technology. 2nd ed. Wiley-VCH, 2000.

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Svarovsky, Ladislav. Solid-liquid separation processes and technology. Elsevier, 1985.

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Svarovsky, Ladislav. Solid-liquid separation processes and technology. Elsevier, 1985.

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Svarovsky, Ladislav. Solid-liquid separation processes and technology. Elsevier Pub. Co, 1985.

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Solid-liquid separation of livestock manure. Agricultural Technologies Section, Alberta Agriculture and Food], 2008.

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Concha A., Fernando. Solid-Liquid Separation in the Mining Industry. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-02484-4.

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International Symposium on Solid/Liquid Separation (1999 Québec, Quebec). Solid/liquid separation: Including hydrometallurgy and the environment : proceedings of the International Symposium on Solid/Liquid Separation. Edited by Harris G. B, Omelon S. J, Canadian Institute of Mining, Metallurgy and Petroleum., Conference of Metallurgists (38th : 1999 : Québec, Quebec), and Hydrometallurgical Meeting (29th : 1999 : Québec, Quebec). Canadian Institute of Mining, Metallurgy and Petroleum, 1999.

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Genck, Wayne J. Liquid-solid operations and equipment. McGraw-Hill, 2008.

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Capítulos de libros sobre el tema "Solid-liquid separation with screens"

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Adorjan, L. A. "Developments in Solid-Liquid Separation." In Mineral Processing at a Crossroads. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4476-3_12.

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Smiles, D. E., and J. M. Kirby. "One-Dimensional Solid-Liquid Separation." In Flow and Transport in the Natural Environment: Advances and Applications. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73845-6_21.

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Abidin, Zurina Zainal, Dayang Radiah Awang Biak, Hamdan Mohamed, and Mohd Yusof Harun. "Solid-Liquid Extraction in Biorefinery." In Separation and Purification Technologies in Biorefineries. John Wiley & Sons, Ltd, 2013. http://dx.doi.org/10.1002/9781118493441.ch13.

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Christensen, Morten L., Knud V. Christensen, and Sven G. Sommer. "Solid-Liquid Separation of Animal Slurry." In Animal Manure Recycling. John Wiley & Sons, Ltd, 2013. http://dx.doi.org/10.1002/9781118676677.ch7.

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Fell, C. J. D., and R. M. McDonogh. "One-Dimensional Solid-Liquid Separation: Commentary." In Flow and Transport in the Natural Environment: Advances and Applications. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73845-6_22.

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Stitt, E. H. "Membrane Separation." In Solid–Liquid Separation. Elsevier, 1990. http://dx.doi.org/10.1016/b978-0-408-03765-5.50028-2.

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Couper, James R., W. Roy Penney, James R. Fair, and Stanley M. Walas. "Solid-Liquid Separation." In Chemical Process Equipment. Elsevier, 2012. http://dx.doi.org/10.1016/b978-0-12-396959-0.00011-2.

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Svarovsky, L. "Solid-liquid separation." In Engineering Processes for Bioseparations. Elsevier, 1994. http://dx.doi.org/10.1016/b978-0-7506-1936-3.50008-4.

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"Solid-Liquid Separation." In Chemical Process Equipment. Elsevier, 2005. http://dx.doi.org/10.1016/b978-075067510-9/50043-7.

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"SOLID–LIQUID SEPARATION." In Chemical Process Equipment. Elsevier, 2010. http://dx.doi.org/10.1016/b978-0-12-372506-6.00007-1.

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Actas de conferencias sobre el tema "Solid-liquid separation with screens"

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Saasen, Arild, and Helge Hodne. "The Influence of Drilling Fluid Rheological Properties on Primary Solids Control." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-41749.

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Throughout the last decades, the design and performance of the primary solid control devices have changed significantly. Some five decades ago, the circular motion shakers dominated the marked. These shakers operated by sending the drilling fluid downhill a vibrating screen. Thereafter appeared the elliptical motion or linear motion shakers where the cuttings particles were vibrated upwards a tilted screen. Onto these shakers, the use of double screen decks and finally triple screen decks became common. Within the last years also the vacuum devices appeared. Throughout the last two decades, there has been an effort to increase the g-forces on these shakers and the industry seems to have preferred the high g-force devices recently. Laboratory studies, however, has indicated that the very high g-forces are not necessary to perform proper solids control. Instead, different vibration modes interacts with the gel structure of the drilling fluid and remove yield stresses. Hence, the fluid becomes mobile for flow through the screen. Flow through screens is strongly dependent on the extensional properties within the drilling fluid rheology. Drilling fluids with high extensional viscosity seldom has a very strong gel structure, and are generally not affected equally much by vibrations. This explains why solids control is more difficult using a KCl/polymer water based drilling fluid than if using an oil based drilling fluid. This article focuses on describing how the drilling fluid rheological properties alter during primary solids control. It is based on theoretical analysis, rheological studies in the laboratory and finally on practical applications in two recent exploration drilling operations. The solids control efficiency resulting from using different screen configurations is outside the scope of this article, as this topic requires a higher focus on separation technology.
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Delfel, Sean, James Olson, Carl Ollivier-Gooch, and Phil Wallace. "Experimental Measurement of Pressure Pulses From a Pulp Screen Rotor." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30859.

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Pressure screens are the most industrially effective way to remove contaminants from a pulp stream, improving the strength, smoothness, and optical qualities of both new and recycled paper. Pressure screens are comprised of two main components: a screen cylinder with narrow slots or small holes and a rotor. The main function of the rotor is to prevent the narrow cylinder apertures from becoming plugged by pulp and debris. In this study, the pressure pulses generated by a novel multi-element foil (MEF) and a single-element foil rotor in a pressure screen were measured at various foil configurations, rotor speeds, and flow rates. The experimental measurements were compared to the results from a computational fluid dynamics model (CFD). Experimental measurements showed that increasing both the angle-of-attack and the flap angle of the MEF increases the magnitude of the negative pressure pulse and reduce the magnitude of the maximum pressure pulse generated by the rotor. At the optimum configurations, the MEF was shown to produce a 126% higher magnitude negative pressure pulse and a 39% lower magnitude positive pressure pulse. It was also found that at higher tip speeds the magnitude of the pressure pulse varies with tip speed squared and the non-dimensional pressure coefficient is Reynolds number independent. Similarly, at higher tip speeds increasing the velocity of the flow through the slots had no effect on the pressure pulse generated by the rotor. At lower rotor speeds, however, the dimensionless pressure was increasingly depending on Reynolds number as slot flow velocity was increased. This is likely due to the increase in slot flow velocity causing the onset of flow separation over the foil. Finally, the numerical model was shown to accurately predict the pressure pulses generated by the MEF at low angles-of-attack and flap angles. However, the model predicted that the foil would stall at lower angles than what was shown experimentally. This is probably because the CFD model used a solid wall boundary condition rather than modeling the slots in the cylinder, preventing low momentum fluid from re-entering the domain.
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"Solid-liquid separation." In The 8th International Mineral Processing Symposium. CRC Press, 2017. http://dx.doi.org/10.4324/9780203747117-111.

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REY, C. M., K. KELLER, and B. FUCHS. "MAGNETICALLY ENHANCED SOLID-LIQUID SEPARATION." In Proceedings of the International Workshop on Materials Analysis and Processing in Magnetic Fields. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812701800_0021.

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William F. Wright. "Defining Manure Solid-Liquid Separation Unit Efficiency." In 2005 Tampa, FL July 17-20, 2005. American Society of Agricultural and Biological Engineers, 2005. http://dx.doi.org/10.13031/2013.19508.

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Victor B Johnson and Patrick K Hartzell. "Mechanical/Chemical Liquid Solid Separation of Anaerobic Digestate." In 2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010. American Society of Agricultural and Biological Engineers, 2010. http://dx.doi.org/10.13031/2013.29987.

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Kukowski, Rob. "MDT: Micro Deformation Technology." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42861.

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Micro-Deformation Technology (MDT) is a proprietary material deformation process that was originally developed for the production of engineered heat transfer tubing. The patented process employs a fixed tool, which mechanically and plastically deforms the work piece to form finite and repeatable channels. These channels are developed in one continuous pass or multiple passes of the tool and the geometric shape and angle of the tool define the final channeled form. The MDT process can achieve a variety of channles form. The MDT process can achieve a variety of channel depths, channel widths, fin shapes and angularity. It can be applied to rounds, sheet and contoured work pieces. MDT is readily adaptable to conventional machining and milling equipment. The MDT process can be performed on nearly any ductile material. Materials ranging from titanium, stainless steel, silver, aluminum, copper, to the non-metallic materials like Teflon, polyethylene, rubber and PVC have been successfully processed. Most materials can be channeled in excess of 250 channels/inch. The process generates no material fines and lubrication is not required for most applications. MDT is therefore ideal for precious metal conversion and secondary cleaning steps are generally not required. Channeling sheet from opposite sides, MDT is capable of producing fine meshes via the intersection of the angled channel depths. The repeatable and uniform channels produce an extremely uniform pore distribution from a solid body. The unique attributes of MDT make it an enabling technology. By itself or in combination with current processes, it opens capability that previously did not exist. Potential applications include: filters and screens; catalyst substrates; heat transfer; material flow and separation; heat pipes; surface cladding and adhesion; capillary structures; surface preparation; and solid surface lubrication, to name only a few.
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Severino, Jose G., Luis Eduardo Gomez, Shoubo Wang, Ram S. Mohan, and Ovadia Shoham. "Mechanistic Modeling of Solids Separation in Solid/Liquid Hydrocyclones." In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2009. http://dx.doi.org/10.2118/124499-ms.

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Chen, Yanhui, Xinjie Zhang, and Linfeng Zhang. "Experimental Study on the Solid-Liquid Separation of Sugar Mud." In 3rd International Conference on Electromechanical Control Technology and Transportation. SCITEPRESS - Science and Technology Publications, 2018. http://dx.doi.org/10.5220/0006973805320535.

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Hong, Sun, Liu Xiaogang, Chen Zhifeng, and Qin Ke. "Post-vulcanization Solid-liquid Separation Device for Medical Latex Gloves." In 2020 5th International Conference on Mechanical, Control and Computer Engineering (ICMCCE). IEEE, 2020. http://dx.doi.org/10.1109/icmcce51767.2020.00020.

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Informes sobre el tema "Solid-liquid separation with screens"

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McCabe, D. J. Evaluation and ranking of the tank focus area solid liquid separation needs. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/170586.

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Poirier, M. R. Evaluating Centrifuges for Solid-Liquid Separation in the SRS Salt Processing Program. Office of Scientific and Technical Information (OSTI), 2002. http://dx.doi.org/10.2172/799305.

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McCabe, D. J. Technology Status Report of the Applicability of Solid-Liquid Separation Methods to Radioactive Tank Wastes. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/626457.

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Poirier, M. R. Evaluation of Solid-Liquid Separation Technologies to Remove Sludge and Monosodium Titanate from SRS High Level Waste. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/768547.

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Poirier, M. R. Impact of Strontium Nitrate and Sodium Permanganate Addition on Solid-Liquid Separation of SRS High Level Waste. Office of Scientific and Technical Information (OSTI), 2002. http://dx.doi.org/10.2172/799304.

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Poirier, M. R., K. M. L. Taylor-Pashow, W. H. Woodham, and D. J. McCabe. Solid-liquid Separation Testing for the Remediation of Hanford Waste Treatment Plant Low Activity Waste Melter Off-Gas Condensate. Office of Scientific and Technical Information (OSTI), 2019. http://dx.doi.org/10.2172/1519113.

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Schmidt, L. W. Chemically modified polymeric resins for solid-phase extraction and group separation prior to analysis by liquid or gas chromatography. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10116845.

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Crouch, Rebecca, Jared Smith, Bobbi Stromer, et al. Preparative, extraction, and analytical methods for simultaneous determination of legacy and insensitive munition (IM) constituents in aqueous, soil or sediment, and tissue matrices. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/41480.

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No standard method exists for determining levels of insensitive munition (IM) compounds in environmental matrices. This project resulted in new methods of extraction, analytical separation and quantitation of 17 legacy and 7 IM compounds, daughter products of IM, and other munition compounds absent from USEPA Method 8330B. Extraction methods were developed for aqueous (direct-injection and solid-phase extraction [SPE]), soil, sediment, and tissue samples using laboratory-spiked samples. Aqueous methods were tested on 5 water sources, with 23 of 24 compounds recovered within DoD QSM Ver5.2 limits. New solvent extraction (SE) methods enabled recovery of all 24 compounds from 6 soils within QSM limits, and a majority of the 24 compounds were recovered at acceptable levels from 4 tissues types. A modified chromatographic treatment method removed analytical interferences from tissue extracts. Two orthogonal high-performance liquid chromatography-ultraviolet (HPLC-UV) separation methods, along with an HPLC–mass spectrometric (HPLC-MS) method, were developed. Implementing these new methods should reduce labor and supply costs by approximately 50%, requiring a single extraction and sample preparation, and 2 analyses rather than 4. These new methods will support environmental monitoring of IM and facilitate execution of risk-related studies to determine long-term effects of IM compounds.
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Crouch, Rebecca, Jared Smith, Bobbi Stromer, et al. Methods for simultaneous determination of legacy and insensitive munition (IM) constituents in aqueous, soil/sediment, and tissue matrices. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/41720.

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Currently, no standard method exists for analyzing insensitive munition (IM) compounds in environmental matrices, with or without concurrent legacy munition compounds, resulting in potentially inaccurate determinations. The primary objective of this work was to develop new methods of extraction, pre-concentration, and analytical separation/quantitation of 17 legacy munition compounds along with several additional IM compounds, IM breakdown products, and other munition compounds that are not currently included in U.S. Environmental Protection Agency (EPA) Method 8330B. Analytical methods were developed to enable sensitive, simultaneous detection and quantitation of the 24 IM and legacy compounds, including two orthogonal high-performance liquid chromatography (HPLC) column separations with either ultraviolet (UV) or mass spectrometric (MS) detection. Procedures were developed for simultaneous extraction of all 24 analytes and two surrogates (1,2-dinitrobenzene, 1,2-DNB; o-NBA) from high- and low-level aqueous matrices and solid matrices, using acidification, solid phase extraction (SPE), or solvent extraction (SE), respectively. The majority of compounds were recovered from four tissue types within current limits for solids, with generally low recovery only for Tetryl (from 4 to 62%). A preparatory chromatographic interference removal procedure was adapted for tissue extracts, as various analytical interferences were observed for all studied tissue types.
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