Gotowe bibliografie tematyczne / Flocculation Tests

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Gotowa bibliografia na temat „Flocculation Tests”

Autor: Grafiati

Data publikacji: 29 lipca 2024

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Flocculation Tests"

Ma, Jun, and Guibai Li. "Laboratory and Full-Scale Plant Studies of Permanganate Oxidation as an Aid in Coagulation." Water Science and Technology 27, no. 11 (1993): 47–54. http://dx.doi.org/10.2166/wst.1993.0263.

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Standard jar tests and full-scale plant studies were conducted to evaluate the effectiveness of permanganate preoxidation as an aid to coagulation-flocculation of surface waters. The results of the Jar tests demonstrated that permanganate preoxidation obviously enhanced the coagulation-flocculation of the studied surface waters. Through full-scale plant studies, the positive effects of permanganate assistance in coagulation-flocculation of surface raters were confirmed by the turbidity reduction of about 4~11 FTU at permanganate dosages of 1~2 mg/L. It was observed that the size of flocs in th

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Luna, Christine Lamenha, Carlos Edison Lopes, and Giulio Massarani. "Recovery of Bacillus sphaericus spores by flocculation/sedimentation and flotation." Brazilian Archives of Biology and Technology 48, spe (2005): 61–70. http://dx.doi.org/10.1590/s1516-89132005000400008.

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The aim of this work was use flocculation/sedimentation and flotation for recovery of spores of the Bacillus sphaericus. Microorganism was produced batchwise using culture medium based skimmed milk, corn steep liquor and mineral salts. The best results of flocculation were obtained using CaCl2.2H2O, FeCl3.6H2O, Al2(SO4)3 and tannin as flocculating agents, with optimal flocculation concentrations of 1,500, 3,000, 2,000 and 1,700ppm, respectively. Flocculent suspensions were characterized based on floc diameter and density. Settling tests were performed in batch at different concentrations of th

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Ying Teh, Huey, Uganeeswary Suparmaniam, Man Kee Lam, et al. "Harvesting of Chlorella Vulgaris Biomass by Using Different Bio-Flocculants: A Comparison Study." International Journal of Biomass and Renewables 8, no. 2 (2019): 17. http://dx.doi.org/10.61762/ijbrvol8iss2art5734.

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In the present study, several natural flocculants were extracted from natural resources to harvest Chlorella vulgaris. Jar tests were carried out to evaluate the flocculation efficiencies of the extracted flocculants in harvesting C. vulgaris cells. Chitosan and maize seeds were proven to be effective flocculants as they achieved more than 80 % efficiency after one(1) hour and four (4) hours of sedimentation time, respectively. Under the optimum flocculation conditions of pH 7, 2 mg/L dosage, 120 rpm of stirring speed for chitosan; and pH 3, 450 mg/L of dosage, 15 rpm of stirring speed for mai

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Xu, Yan, Kemin Gan, Siyi Liang, Haitao Liu, and Qunhui Wang. "Investigation and Optimization of Chitosan Performance in Flocculating Kaolin Suspensions Using a Real-Time Suspending Solid Concentration Measuring Method." Water 13, no. 4 (2021): 513. http://dx.doi.org/10.3390/w13040513.

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The performance of chitosan in flocculating kaolin suspensions was investigated. A real-time suspended solid (SS) concentration measuring method was applied. The influence of pH was examined from 2.0 to 13.0. The optimal pH value for low-grade (100 mg/L), middle-grade (500 mg/L), and high-grade (1000 mg/L) kaolin suspension samples was 8.0. The optimal dosage of chitosan for the three grades of kaolin suspensions was 5.0 mg/L, regardless of the initial SS concentration. An orthogonal array test was performed to determine the optimal hydraulic conditions. Range analysis and variance analysis sh

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Monette, Frédéric, François G. Brière, Michel Létourneau, Marc Duchesne, and Robert Hausler. "Traitement des eaux usées par coagulation-floculation avec recirculation des boues chimiques : Évaluation et validation à grande échelle." Canadian Journal of Civil Engineering 27, no. 4 (2000): 735–53. http://dx.doi.org/10.1139/l00-045.

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Two sequences of tests were carried out at the Centre d'épuration Rive-Sud wastewater treatment plant (Longueuil, Que.) to evaluate the performances of a coagulation-flocculation process with chemical sludge recycling. The tests consisted in following the evolution of the quality of the treated water when two flowsheets are supplied simultaneously in parallel with the same wastewater, one flowsheet incorporating the sludge recycling process. Results showed that the recycled sludge contributes significantly to water degradation compared with a classical coagulation-flocculation system. These re

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Fu, Chaochen, Zhengan Zhang, Yuying Li, et al. "Optimizing the Flocculation Effect of Cationic Polyacrylamide Prepared with UV-Initiated Polymerization by Response Surface Methodology." Water 15, no. 6 (2023): 1200. http://dx.doi.org/10.3390/w15061200.

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Cationic polyacrylamide (CPAM) is a commonly used flocculant for water treatment. Factors that affect the flocculation effect and can be controlled manually include the type and dosage of CPAM, wastewater pH, stirring time and settling time, and their reasonable setting is critical to the flocculation effect of CPAM. In this paper, the optimal flocculation conditions of a novel CPAM were studied. First, single-factor tests were conducted to preliminarily explore the optimal range of factors that influence CPAM flocculation, and then response surface methodology (RSM) tests were performed to ac

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Kaya, Özlem, and Ahmet Özkan. "Feldspar flocculation performance using cationic and anionic flocculants in dual system: evaluation by turbidity, settling rate and flocculation efficiency." Journal of Scientific Reports-A, no. 060 (March 25, 2025): 99–106. https://doi.org/10.59313/jsr-a.1640994.

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This study investigated the flocculation performance of feldspar using combinations of cationic and anionic flocculants in a dual flocculation system. Flocculation tests were performed with five different flocculants (C.1597, A.336, A.338, A.1011 and A.5250) at various dosages (0.2 mg/L to 12.5 mg/L). Flocculation performance was evaluated based on turbidity, settling rate, and flocculation efficiency. Among the flocculant combinations tested, the C.1597-A.338 combination showed that the most effective performance of both turbidity reduction and flocculation efficiency. In the flocculation tes

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Monette, Frédéric, François G. Brière, Michel Létourneau, Marc Duchesne, and Robert Hausler. "Traitement des eaux usées par coagulation-floculation avec recirculation des boues chimiques : Performance générale et stabilité du procédé." Canadian Journal of Civil Engineering 27, no. 4 (2000): 702–18. http://dx.doi.org/10.1139/l00-047.

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Six series of tests were carried out to have a better understanding of the stability and efficiency of a coagulation-flocculation process with chemical sludge recycling. The tests consisted in sequential sludge recycling in 100-L pilot reactors. Other tests were performed to examine the stability following wastewater loading variations. Results showed that stability was reached immediately during the first recycling sequences. Furthermore, to obtain improved results compared with those of a classical coagulation-flocculation process, the flocculant concentration must be increased according to

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Maćczak, Piotr, Halina Kaczmarek, Marta Ziegler-Borowska, Katarzyna Węgrzynowska-Drzymalska, and Aleksandra Burkowska-But. "The Use of Chitosan and Starch-Based Flocculants for Filter Backwash Water Treatment." Materials 15, no. 3 (2022): 1056. http://dx.doi.org/10.3390/ma15031056.

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Inorganic aluminum or iron salts supported with synthetic polymers are commonly used to eradicate colloidal particles from water in coagulation and flocculation processes. Nevertheless, these agents have several disadvantages, such as large volumes of sludge produced or environmental toxicity. Recently biodegradable polymers have been suggested as eco-friendly flocculants for water treatment. This study aimed to investigate the possibilities of using starch and chitosan and their oxidized derivatives as flocculants for filter backwash water treatment. Dialdehyde starch (DST) and dialdehyde chi

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Kaiser, M. "Operational tests on combined flocculation in coal processing." Fuel and Energy Abstracts 37, no. 3 (1996): 173. http://dx.doi.org/10.1016/0140-6701(96)88377-9.

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Rozprawy doktorskie na temat "Flocculation Tests"

Hägg, Kristofer. "Kalciumklorid som hjälpkoagulant." Thesis, KTH, Skolan för kemivetenskap (CHE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170638.

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As populations continue to grow, the demand for fresh drinking water is increasing. This puts a lot of pressure on drinking water producers to strive for more efficient solutions and techniques. Many producers worldwide use surface water as a raw water source, which they often treat through coagulation and flocculation techniques. This is done by adding coagulant (e.g. metal coagulants), creating instability in the suspension, causing flocculation. In this work, PIX-311 (a FeCl3 coagulant produced by Kemira) and Al2(SO4)3 (Kemwater ALG) were used as primary coagulants and CaCl2 (produced by TE

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King, Charles Sean. "The Utilization of Granular Media Filtration and Rapid Flocculation in a Modified Jar Test Procedure for Drinking Water Treatment." Thesis, The University of North Carolina at Charlotte, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10683115.

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<p> Jar testing is one of the most common tools that water treatment facilities use to determine the treatment conditions necessary to meet finished water quality goals. A six-place stirrer is normally used for jar testing to provide identical mixing conditions while coagulant dose and pH vary in each jar to create “floc” that is removed via sedimentation. There are some utilities that are unable to utilize jar testing, since the current jar testing procedures do not identify optimum treatment conditions for their water supply. This is particularly true for those utilities treating

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Brites, Anny Stella Monteiro. "Seleção de linhagens de Saccharomyces cerevisiae potencializadas pelo fator Killer, H2S- e o carater floculante." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/11/11141/tde-19052003-144728/.

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Dentre as características desejáveis em leveduras fermentadoras alcóolicas estão a capacidade de floculação, a não produção de H2S e o caráter "killer". Neste trabalho foram selecionadas sete linhagens de Saccharomyces cerevisiae com algumas destas características, que passaram por testes confirmativos e pela cariotipagem eletroforética resultando na escolha de duas linhagens: ATCC 26602 (altamente floculante) e K1 (H2S - e possuidoras do caráter "killer"). Estas linhagens foram utilizadas em um cruzamento via fusão de protoplasto para se obter um produto de fusão estável com as característica

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Hespanhol, Katia Maria Hipolito. "Cinética de floculação de suspensões coloidais: influência da dosagem de coagulante metálico e da concentração de partículas primárias nas constantes de agregação e ruptura." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3147/tde-05032018-150830/.

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A floculação é o principal estágio do tratamento da água e apesar dos significativos avanços alcançados nos últimos anos, a compreensão do mecanismo de floculação está longe de ser completa. O objetivo principal do presente trabalho foi investigar a cinética de floculação de suspensões coloidais, através da influência da dosagem de coagulante metálico e da concentração de partículas primárias nas constantes de agregação e ruptura, utilizando o modelo de Argaman e Kaufman para a cinética de floculação de um reator em batelada. A água bruta sintética foi feita com a adição de caolinita, de tal f

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Voltan, Paulo Eduardo Nogueira. "Avaliação da ruptura e do recrescimento de flocos na eficiência de sedimentação em água com turbidez elevada." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-10072007-202831/.

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Durante a floculação, a agitação promove dois efeitos simultaneamente, a agregação e a ruptura. A ruptura ocorre devido à atuação de forças de cisalhamento sobre os flocos. O aumento da agitação com, conseqüentemente, aumento do gradiente de velocidade médio, em água com flocos formados, promove o aumento das forças de cisalhamento e a degradação parcial ou total dos mesmos, em poucos segundos. Retornando à condição anterior de agitação, pode ocorrer o recrescimento dos flocos. Através de ensaios em reatores estáticos (em equipamento de jarteste) foram estudados os efeitos da ruptura e da refl

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Sapla, Rudner Brancalhoni. "Tratamento físico químico da vinhaça de destilaria de etanol com biopolímero à base de cálcio." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-01022013-095340/.

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Este presente trabalho teve como objetivo a investigação do desempenho de um biopolímero experimental à base de cálcio, desenvolvido e fornecido por uma empresa americana, na coagulação, floculação e sedimentação da vinhaça bruta como tratamento físico-químico na remoção de carga orgânica e na concentração de compostos fertilizantes no lodo. O estudo do tratamento da vinhaça por meio da aplicação deste biopolímero possibilitaria, hipoteticamente, uma redução significativa da carga orgânica como tratamento inicial da vinhaça, além de concentrar os nutrientes presentes na vinhaça no lodo gerado

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Silva, Rafael Camargo D\'Ambrósio da. "Pós-tratamento de efluente de sistema biológico aeróbio em batelada de lixiviado de aterro sanitário através do processo físico-químico." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3147/tde-12122011-144123/.

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As melhoras nas condições de disposição de resíduos sólidos em aterros sanitários teve, como conseqüência, a geração de um efluente com um grande potencial poluidor, o lixiviado de aterro sanitário, que anteriormente percolava pelo solo. Com o confinamento da massa de lixo e a impermeabilização do aterro, o lixiviado começou a ser coletado exigindo que o mesmo fosse tratado. A necessidade do tratamento deste efluente está relacionada com sua toxidade,pois contém altas concentrações de amônia, metais e alta carga orgânica que se originam da decomposição de compostos contidos no interior

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Rocha, Vinícius Carvalho. "Processamento anaeróbio de vinhaça pré-tratada com biopolímero à base de cálcio." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-14062012-100601/.

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O objetivo principal desta pesquisa foi comparar o desempenho de dois reatores anaeróbios híbridos de biomassa imobilizada (RAHBI), em escala de laboratório, no processamento da vinhaça de cana-de-açúcar. Um (reator 1) recebendo vinhaça sem tratamento prévio e outro (reator 2) processando vinhaça previamente submetida à coagulação, utilizando-se de um biopolímero experimental a base de cálcio. Os reatores foram construídos em acrílico, com volume de 1,5 litros cada, provido de sistema de recirculação com razão igual a 3. A operação dos reatores foi dividida em duas etapas: a primeira, com dura

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Constantino, Luís Truppel. "Ruptura e recrescimento de flocos em água com substâncias húmicas aquáticas coagulada com sulfato de alumínio e cloreto férrico." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-22102008-193848/.

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Por meio de ensaios em reatores estáticos (em equipamento de jarteste) foram estudados os efeitos da ruptura e da refloculação na sedimentação dos flocos, para diferentes velocidades de sedimentação. A água de estudo foi preparada com substâncias húmicas aquáticas (SHA) extraídas de água coletada do rio Itapanhaú - Bertioga/SP, resultando cor verdadeira de 100 uH, e coagulada com sulfato de alumínio e cloreto férrico. Para os dois coagulantes, foram realizadas as etapas de coagulação, mistura rápida, floculação, ruptura (G=50, 100 e 150/s) e refloculação (G=10 e 20/s). Na sedimentação sem a oc

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Amaral, Mailer Sene. "Tratamento físico-químico de lixiviado de aterro sanitário pré-tratado por processo biológico aeróbio." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/3/3147/tde-09092009-101501/.

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Lixiviados de aterros sanitários apresentam altas concentrações de nitrogênio amoniacal e matéria orgânica, além de outros poluentes, que não permitem seu descarte no meio ambiente, sem um prévio tratamento. Lixiviados de aterros sanitários mais antigos, com matéria orgânica mais estabilizada, apresentam grande potencial poluidor, principalmente devido à presença de substâncias recalcitrantes que, usualmente, não são removidas através de tratamento biológico, necessitando, portanto, da aplicação de um pós-tratamento. A presente pesquisa objetivou aplicar o tratamento físico-químico a dois eflu

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Książki na temat "Flocculation Tests"

Pivokonský, Martin, Kateřina Novotná, Lenka Čermáková, and Radim Petříček, eds. Jar Tests for Water Treatment Optimisation. IWA Publishing, 2022. http://dx.doi.org/10.2166/9781789062694.

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Abstract The book is intended as a handbook providing detailed instructions for the correct conducting of jar tests, which are needed for the optimisation of the coagulation/flocculation process. It contains the essential theoretical background of coagulation/flocculation, including a description of the influence of different parameters on the coagulation efficiency of various impurities (e.g. pH value and type/dose of coagulant), and floc properties and their separation (e.g. mixing intensity, mixing time, but also type/concentration of coagulant and impurities). The principle of jar tests is

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Części książek na temat "Flocculation Tests"

Maclagan, N. F. "Recent Developments in Flocculation Tests." In Ciba Foundation Symposium - Liver Disease. John Wiley & Sons, Ltd, 2008. http://dx.doi.org/10.1002/9780470718766.ch1.

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Zhang, Wei, Xingyu Li, and Dong Zhang. "Application of Tower Type Cyclone Stabilizing Cylinder Concentration Technology in Wastewater Treatment of Sand and Gravel Processing System of Batang Hydropower Station." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-9184-2_16.

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AbstractThe artificial sand and stone processing plant has always been a major pollutant discharge household in hydropower station construction, and the problems of dust and waste water are more prominent. In order to solve the problem of waste water, the artificial sand and stone processing system often uses the wet production process, combined with the sewage treatment facilities to treat the waste water produced by the system, and the pollution particles are precipitated and dehydrated again. The proper measures can realize the zero discharge of waste water. The treatment method of floccula

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Zhang, Jian, Udo Wiesmann, and Andreas Grohmann. "Process Control of a Chemical Water Treatment Plant by a Continuous Flocculation Test." In Chemical Water and Wastewater Treatment. Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-76093-8_17.

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Hernebring, Claes. "SETTLING TESTS AS A MEANS OF IMPROVING FLOCCULATION PERFORMANCE — AN ON-LINE MEASUREMENT APPLICATION." In Instrumentation and Control of Water and Wastewater Treatment and Transport Systems. Elsevier, 1985. http://dx.doi.org/10.1016/b978-0-08-032591-0.50097-x.

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Tupy, Isabela Carvalho, Gyzelle Pereira Vilhena do Nascimento, Alberto de Andrade Reis Mota, and Simone Cruz Longatti. "Development of phytocosmetics based on the hydroalcoholic extract of Myrciaria cauliflora (jabuticaba)." In DEVELOPMENT AND ITS APPLICATIONS IN SCIENTIFIC KNOWLEDGE. Seven Editora, 2023. http://dx.doi.org/10.56238/devopinterscie-221.

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Brazil holds the largest reserves of natural resources in the world, being an international highlight in biological diversity, it is estimated that 20% of the total species already inventoried are in Brazil. However, the literature indicates that there are few studies related to the use and development of technologies from native plants, mainly in the cosmetic industry. This work aims to develop a cosmetic product based on the hydroalcoholic extract of the bark of Myrciaria Cauliflora (jabuticaba) and carry out its quality control. As an extraction methodology, cold maceration was used, with d

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"Flocculations-Test." In Springer Reference Medizin. Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-48986-4_311389.

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Wilkinson A., Haque A., Kodikara J., Adamson J., and Christie D. "Physico-chemical aspects of cementitious slurry design for the stabilisation of reactive soils." In Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering. IOS Press, 2005. https://doi.org/10.3233/978-1-61499-656-9-1813.

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The physico-chemical implications of cementitious stabilisation across a range of soil geochemical conditions have been addressed to rationalise the current state of practice. The processes that influence the gain in soil characteristics include the short-term flocculation of clay particles that stabilises the expansive nature of moisture-sensitive soils, and the occurrence of pozzolanic reaction to give cementitious products. The proposed approach to slurry design is based on assessing the potential for these two processes in the soil chemistry and mineralogy and matching a complementary ceme

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Nakamura, Takashi, Kazuhiro Chiba, Yumiko Asahara, and Setsuzo Tada1. "Prediction of barley which causes premature yeast flocculation." In European Brewery Convention. Oxford University PressOxford, 1997. http://dx.doi.org/10.1093/oso/9780199636907.003.0006.

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Abstract During fermentation of wort produced from certain malts, premature yeast flocculation occurs leaving fermentable sugars in solution. Premature yeast flocculation results in a low attenuation. We have developed a novel fermentation method to predict barley which causes premature yeast flocculation. A barley extract obtained by hot-water extraction using an enzyme mixture of BÂ¬ glucanase, protease, a-amylase and B-amylase was added to a synthetic medium. The premature yeast flocculation activity of this extract was evaluated by a fermentation test. Analysis could be carried out within

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Kempers, J., P. C. van der Aar, and J. Krotje. "Flocculation characteristics of brewer’s yeast during fermentation." In European brewery convention. Oxford University PressOxford, 1991. http://dx.doi.org/10.1093/oso/9780199632831.003.0030.

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Abstract Control of yeast flocculation is very important, especially in brewery groups where fermenters of varying sizes and geometries are in use. Recently we started a multidisciplinary project to study the biochemical, physical and physiological aspects of flocculation. A quantative test for flocculence (the potential to flocculate) has been developed. With this test it has been shown that during fermentation yeast cells become flocculent at the time of cell division arrest. The concentration of wort amino acids in standard 12 °P wort did not influence flocculence in subsequent fermentation

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Anderson, I. W. "The role of malt components in mash flocculation and wort filtration." In European Brewery Convention. Oxford University PressOxford, 1993. http://dx.doi.org/10.1093/oso/9780199634668.003.0021.

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Abstract A wide range of “porosity” values are encountered when laboratory-scale mashes are assessed using a simple filtration test. This “porosity” can be greatly improved by adding a cationic polyelectrolyte (protein or polysaccharide) which flocculates anionic particles present in the mash. It has been shown that cationic proteins isolated from malt can flocculate mash particles in a laboratory assay, whereas addition of a cationic polysaccharide to the mash of a pilot-scale brew reduces lautering time.

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Streszczenia konferencji na temat "Flocculation Tests"

Adina, Pacala. "ARSENIC REMOVAL FROM GROUNDWATER BY COAGULATION PROCESS: PERFORMANCE AND LIMITATIONS INFLUENCED BY THE GROUNDWATER SOURCES CHEMISTRY USED FOR DRINKING WATER PURPOSE IN THE WEST REGION OF ROMANIA." In 24th SGEM International Multidisciplinary Scientific GeoConference 2024. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024v/3.2/s11.03.

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Arsenic (As) contaminated groundwater is a critical issue of concern, in view of its toxicity through drinking water and health impacts on the human body. In this regard, the World Health Organization (WHO, 1993) has recommended 10 ?g/L for dissolved As concentration in water as standard value for drinking purposes. Special attention should be paid to the monitoring the quality of the groundwater, the chemistry and composition of arsenic-contaminated water are the major factors, determining the applied technologies for removal of arsenic. The coagulation-flocculation process is well known as p

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Kumar, Anupam, Benito Moyls, Ardalan Sadighian, Jason Schaan, and Sean R. Sanders. "Use of Pipeline Pressure Gradients to Monitor Inline Polymer Flocculation of Oil Sand Fine Tailings." In The 20th International Conference on Transport and Sedimentation of Solid Particles. Wydawnictwo Uniwersytetu Przyrodniczego we Wrocławiu (WUELS Publishing House)), 2023. http://dx.doi.org/10.30825/4.14-16.2023.

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In Canada’s oil sands industry, the processing and storage of fluid fine tailings is important because it directly impacts land usage and reclamation, water and thermal energy requirements as well as environmental stewardship and mine sustainability. A key technology used for this purpose is inline flocculation, wherein existing inventories of fluid fine tailings are withdrawn from tailings storage facilities and mixed with polymer flocculants. These flocculated tailings can be then sent through additional process stages (e.g. evaporation, centrifugation, filtration) to promote dewatering and

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Avramenko, Valentin, Svetlana Bratskaya, Dmitry Marinin, Anatoliy Terzi, and Mariya Yarmolyuk. "Pilot Test of Precipitation Setup for Dust Supressor and Transuranic Elements Removal From Wastewaters of Chernobyl Nuclear Power Plant." In ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2011. http://dx.doi.org/10.1115/icem2011-59256.

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In this paper we report the results of pilot tests of flocculation/precipitation setup for dust-suppressor (DS) and transuranic elements (TUE) removal from wastewaters of Chernobyl Nuclear Power Plant (ChNPP), including those of the Object “Shelter”. Tests were performed on the pilot unit (PU), which included service tank, precipitation tank, and accumulation tank, 300 dm3 each, connected with pipelines with dosing and pumping equipment, and throttle valves providing controlled dosing, mixing, precipitation and mechanical filtration of radioactive wastewaters under different conditions. The re

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Murtaza, Mobeen, Mujtaba Allowaim, Azeem Rana, et al. "Comprehensive Assessment of Inorganic Salt Inhibitors for Clay Swelling Mitigation in Drilling and Completion Operations." In SPE Conference at Oman Petroleum & Energy Show. SPE, 2024. http://dx.doi.org/10.2118/218563-ms.

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Abstract Clay swelling in geological formations presents a substantial challenge during drilling and completion operations, resulting in formation damage and decreased wellbore productivity. To address this issue, various clay swelling inhibitors have been incorporated into drilling and completion fluids. Inorganic salts, such as KCl, CaCl2, NaCl, and MgCl2, are frequently employed for their inhibitory properties. This study aims to consolidate and provide a comprehensive overview of the inhibitory potential of these inorganic salts by concurrently examining multiple salts at various concentra

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Sharma, Rohan, Scott Shirley, Tahir Farrukh, Mohammadhassan Kavosi, and Myeongsub Kim. "Microalgae Harvesting in a Microfluidic Centrifugal Separator for Enhanced Biofuel Production." In ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2020 Heat Transfer Summer Conference and the ASME 2020 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icnmm2020-1078.

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Abstract Biofuel is one of the renewable energy resources alternatives to fossil fuels [1]. Among various sources for biofuels, microalgae provide at least three-orders-of-magnitude higher production rate of biodiesel at a given land area than conventional crop-based methods. However, microalgal biodiesel still suffers from significantly lower harvesting performance, making such a fuel less competitive. To increase the separation performance of microalgae from cultivation solution, we used a spiral microchannel that enables the isolation of biofuel-algae particles from water and contaminants c

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Sun, Hong, Ying-ying Lin, Xi Geng, Lanka Wickramasinghe, Fulya Zalluhoglu, and Qing Wang. "Engineering a Synthetic Friction Reducer to Combat Undesirable Formation of FR-Metal Complex/Precipitation in Slickwater Fracturing." In SPE Hydraulic Fracturing Technology Conference and Exhibition. SPE, 2024. http://dx.doi.org/10.2118/217763-ms.

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Abstract During stimulation and production, a highly viscous and rubbery precipitation can form due to incompatibility of friction reducer polymers (cationic, anionic or amphoteric) with ferric ions, particularly in formations with high iron content. This material plugs up proppant packs, even production strings, and is extremely detrimental to well productivity. A straightforward sequestration approach with chelants does not work because of poor outcome and prohibitive economics. Compatible biopolymer FRs, as an alternative approach, have limited applications due to their moderate FR performa

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Fengjiu Li, Qingmei Jia, and Fusheng Niu. "Computer simulation of flocculation for fine hematite particle with FLUENT." In 2009 International Conference on Test and Measurement (ICTM). IEEE, 2009. http://dx.doi.org/10.1109/ictm.2009.5413082.

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Punase, Abhishek, Antonio Pedro Oliveira, and Jonathan Wylde. "Green and Sustainable Asphaltene Dispersant with Cardanol Derivatives for Medium and Heavy Asphaltenic Oil Application." In SPE Eastern Regional Meeting. SPE, 2022. http://dx.doi.org/10.2118/211872-ms.

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Abstract Phenolic resins are major class of polymeric compounds used for treating asphaltene instability related challenges. Such compounds often act like as artificial resins naturally present in crudes to prevent the aggregation of asphaltene molecules and therefore their tendency to deposit on solid surfaces. However, these phenolic resins are known to have toxicity and biodegradability issues. Aim of this work is to elucidate and compare cardanol ethoxylates derivatives as asphaltene dispersants in comparison with commonly used phenolic resins chemistries. To characterize the effects of ca

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Onabe, Fumihiko, and Kunio Sakurai. "Applications of Flow Visualization Technique in Wet End Chemistry." In Fundamentals of Papermaking, edited by C. F. Baker and V. Punton. Fundamental Research Committee (FRC), Manchester, 1989. http://dx.doi.org/10.15376/frc.1989.1.219.

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A microcomputer–aided flow visualization system consisting of Strobovision analyzer(SVA) and image processing apparatus was applied to the analysis of the effect of a variety of parameters in wet end chemistry on the flocculation behavior of model stock systems. These are (a)single polymer addition systems and dual component additive systems,(b)low and high filler content suspensions,and (c)colloidal force and hydrodynamic shear force. Analysis by digital geometry was carried out to represent features of projected images of flocs and fiber network supporting flocs. The flocculation states were

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Moringo, Nicole, Fatee Malekahmadi, Yifan Li, Brian Price, Moin Muhammad, and Moosaa Young. "Case Study of Drag Reducing Agent Application in Produced Water Reuse: Produced Water Throughput Improvement, Total Cost Reduction, ESG Enhancement." In International Petroleum Technology Conference. IPTC, 2024. http://dx.doi.org/10.2523/iptc-23706-ea.

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Abstract Objective/Scope In response to environmental, social, and governance (ESG) regulations, the industry has shifted to using produced water for hydraulic fracturing. However, the present infrastructure limits the volume of produced water that can be transferred. As infrastructure is not easily replaced, a water-based drag reducing agent (DRA) can chemically alter pipe friction. Formulating a DRA with shear stability and chemical compatibility in produced water remains a significant obstacle and requires thoughtful and specific chemistry. Methods, Procedures, Process A comprehensive water

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Raporty organizacyjne na temat "Flocculation Tests"

Xu, Yuming, and H. Hamza. Flocculation of oil sand tailings. pilot-scale tests. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1997. http://dx.doi.org/10.4095/305296.

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Bradford, Joe, Itzhak Shainberg, and Lloyd Norton. Effect of Soil Properties and Water Quality on Concentrated Flow Erosion (Rills, Ephermal Gullies and Pipes). United States Department of Agriculture, 1996. http://dx.doi.org/10.32747/1996.7613040.bard.

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Concentrated flow erosion in rills, pipes, ephermal gullies, and gullies is a major contributor of downstream sedimentation. When rill or gullies form in a landscape, a 3- to 5-fold increase in soil loss commonly occurs. The balance between the erosive power of the flow and the erosion resistance of the bed material determines the rate of concentrated flow erosion. The resistance of the bed material to detachment depends primarily on the magnitude of the interparticle forces or cohesion holding the particles and aggregates together. The effect of soil properties on bed material resistance and

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