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Letteratura scientifica selezionata sul tema "Flocculation"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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Articoli di riviste sul tema "Flocculation"

1

P. Radhakrishnan, Anand N., Marco P. C. Marques, Matthew J. Davies, Brian O'Sullivan, Daniel G. Bracewell, and Nicolas Szita. "Flocculation on a chip: a novel screening approach to determine floc growth rates and select flocculating agents." Lab on a Chip 18, no. 4 (2018): 585–94. http://dx.doi.org/10.1039/c7lc00793k.

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2

Kurbiel, J., A. Sapulak, and H. Schade. "The Use of a Turbulent Pipe-Flow for Rapid Flocculation of Precipitate in the Electroplating Wastewater Treatment." Water Science and Technology 24, no. 7 (1991): 255–59. http://dx.doi.org/10.2166/wst.1991.0208.

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The paper presents the results of an experimental pilot study on advanced flocculation of metal hydroxides that are precipitated from electroplating wastewater during pH-adjustment. A pipe-flocculator with a turbulent flow, to ensure proper mixing conditions, was used instead of a classical flocculation tank. The results of the study indicated a high efficiency of the process. The flocculation proceeded within 50-100 seconds, which was much less than is required during classical flocculation. Application of a pipe-flocculator results also in reduction of both capital and operating costs of the

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3

Balakrishna, K., B. R. Manjunatha, and R. Shankar. "A Laboratory Study of the Flocculation of Dissolved Heavy Metals in Kali RiverDuring Estuarine Mixing, West Coast of India." Journal Geological Society of India 50, no. 6 (1997): 753–58. http://dx.doi.org/10.17491/jgsi/1997/500611.

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Abstract River water-sea water mixing experiments were carried out to study the time dependence of flocculation process, the flocculation behaviour of dissolved Cu, Pb, Zn, Ni, Co, Mn, Cr and Fe in the Kali estuary. Flocculation appears to be maximum at high salinities (&gt;25‰) and is rapid, about 7 to 60% of the dissolved metal content flocculating within half an hour of mixing. This brings out the role of sea water as a powerful flocculating agent for the dissolved load of river water.

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4

Dong, Ming, and Qiong Fang Shao. "Study of a Novel Honeycomb Continuous Flocculator." Advanced Materials Research 1033-1034 (October 2014): 435–38. http://dx.doi.org/10.4028/www.scientific.net/amr.1033-1034.435.

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The continuous flocculator described in this article refers to a kind of continuous flocculation device designed to flocculate fermentation liquid. The honeycomb continuous flocculator is composed of a vessel and built-in trapezoid subassemblies, which divide the space within the vessel into multiple honeycomb channels. The length ratio between the longest diagonal of the regular hexagon and the axial length of the channel is within the range 0.01–0.04; and the internal surface roughness (Ra) of the channels should be 0 < Ra ≤ 0.2 μm. In contrast to current flocculator designs, the channels

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5

Lai, Yan Ping, and Jian Hai Zhao. "The Numerical Simulation Study of a Flocculation Reactor." Applied Mechanics and Materials 260-261 (December 2012): 1022–25. http://dx.doi.org/10.4028/www.scientific.net/amm.260-261.1022.

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Three-dimensional flow field of flocculating reactor is simulated. Numerical results were applied to analyze and explain influence of flow field under different flocculation conditions. The results indicate that k, ε can reasonably explain flocculation effect, and meanwhile verify the better applicability as the CFD numerical simulation evaluation indexes of flocculation effect. The results can be extended to find an effective way to optimize the design and operation, to improve the efficiency of flocculation.

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6

Westman, Johan O., Valeria Mapelli, Mohammad J. Taherzadeh, and Carl Johan Franzén. "Flocculation Causes Inhibitor Tolerance in Saccharomyces cerevisiae for Second-Generation Bioethanol Production." Applied and Environmental Microbiology 80, no. 22 (2014): 6908–18. http://dx.doi.org/10.1128/aem.01906-14.

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ABSTRACTYeast has long been considered the microorganism of choice for second-generation bioethanol production due to its fermentative capacity and ethanol tolerance. However, tolerance toward inhibitors derived from lignocellulosic materials is still an issue. Flocculating yeast strains often perform relatively well in inhibitory media, but inhibitor tolerance has never been clearly linked to the actual flocculation abilityper se. In this study, variants of the flocculation geneFLO1were transformed into the genome of the nonflocculating laboratory yeast strainSaccharomyces cerevisiaeCEN.PK 11

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Li, Rongpeng, Xuesong Li, Lei Sun, et al. "Reduction of Ribosome Level Triggers Flocculation of Fission Yeast Cells." Eukaryotic Cell 12, no. 3 (2013): 450–59. http://dx.doi.org/10.1128/ec.00321-12.

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ABSTRACTDeletion of ribosomal protein L32 genes resulted in a nonsexual flocculation of fission yeast. Nonsexual flocculation also occurred when two other ribosomal protein genes,rpl21-2andrpl9-2, were deleted. However, deletion of two nonribosomal protein genes,mpgandfbp, did not cause flocculation. Overall transcript levels ofrpl32inrpl32-1Δ andrpl32-2Δ cells were reduced by 35.9% and 46.9%, respectively, and overall ribosome levels inrpl32-1Δ andrpl32-2Δ cells dropped 31.1% and 27.8%, respectively, compared to wild-type cells. Interestingly, ribosome protein expression levels and ribosome l

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8

Liu, Quan Xiao, Wen Cai Xu, and Jin Li Li. "Application of Cationic Starch Graft Copolymer in Flocculating of Wastewater from Bleaching." Advanced Materials Research 356-360 (October 2011): 1985–89. http://dx.doi.org/10.4028/www.scientific.net/amr.356-360.1985.

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Corn starch, acrylamide and diallyl dimethyl ammonium were used as the raw materials and ammonium persulfate as initiator, cationic starch graft copolymer was prepared, and then the prepared cationic starch graft copolymer is applied to flocculate wastewater from bleaching. The results show that The flocculation of cationic starch graft copolymer to wastewater from increases first and then decreases after the reach of the peak with the increase of the cationic degree of the cationic starch graft copolymer, addition amount, flocculating temperature and flocculating time. When the cationic degre

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9

Zhou, Li Na, Ling Du, and Wen Jie Zhang. "The Effect of KNO₃ on Electrolysis-Assisted Flocculation of Azophloxine Using Polyaluminum Chloride." Applied Mechanics and Materials 707 (December 2014): 3–6. http://dx.doi.org/10.4028/www.scientific.net/amm.707.3.

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Electrolysis-assisted flocculation methods were used in decoloration of azophloxine. Electrolysis-assisted flocculation of azophloxine was conducted under the applied potential using titanium anode. The concentration of KNO3, flocculating time and applied potential were investigated. The application of applied potential has nearly no power to remove the dye from wastewater since the highest decoloration rate is only 2.5% after treatment at KNO3 concentration of 0.6 mol/L. The total flocculating decoloration efficiency decreases gradually after increasing the KNO3 concentration in the solution.

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Kurbiel, Jerzy, Adam Sapulak, and Horst Schade. "Application of Pipe Flocculator and Cross-Flow Tilted Plate Settler for Effective Separation of Precipitate from Electroplating Wastewater." Water Science and Technology 21, no. 6-7 (1989): 539–46. http://dx.doi.org/10.2166/wst.1989.0256.

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During a research program, the flocculation and settling of suspended solids in electroplating wastewater were tested. The experimental unit comprised a pipe flocculator and a cross-flow tilted plate settler. The experiment showed high efficiency of the system at short flocculation and settling times: τf = 50 s and τc = 11 min., respectively.

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Tesi sul tema "Flocculation"

1

Cousland, Bryan. "Flocculation and flocculating mutants of Pseudomonas putida." Thesis, University of Strathclyde, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291993.

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Domingo, Jody L. (Jody Lawren). "Stationary phase-specific expression of dominant flocculation genes for controlled flocculation of yeast." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/49788.

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Thesis (MSc)--University of Stellenbosch, 2003.<br>ENGLISH ABSTRACT: Flocculation can be defined as the asexual aggregation of yeast cells in a liquid environment. This aggregation of cells, also referred to as "floc formation", will in most cases lead to rapid settling or sedimentation. However, in so-called top-fermenting yeast strains, the floes can move to the surface of the liquid growth substrate to form a thin layer, called a "velum", that has been compared to other microbial biofilms. The factors that trigger flocculation can be divided into two groups, physical/chemical (e.g. s

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Chin, Ching-Ju. "Particle flocculation in stirred tanks." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/21253.

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Kazi, Noor Mohammed. "Pneumatic flocculation in water treatment." Thesis, Nottingham Trent University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283273.

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5

Bilgen, Sedat. "Shear flocculation of fine cassiterite." Thesis, University of Exeter, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304300.

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Thomas, David N. "Flocculation modelling in wastewater treatment." Thesis, Cranfield University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323835.

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Khan, M. M. "Selective flocculation of lead-zinc concentrate." Thesis, University of Nottingham, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355440.

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Waterson, Joanne. "Selective flocculation by small particle adsorption." Thesis, University of Bristol, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279824.

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Jones, David Andrew Ross. "Depletion flocculation of sterically-stabilized particles." Thesis, University of Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364692.

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Ramirez, Mendoza Rafael. "Flocculation controls in a hypertidal estuary." Thesis, University of Liverpool, 2015. http://livrepository.liverpool.ac.uk/2010209/.

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Estuaries are ephemeral geological formations in constant change, which is being accelerated by human intervention. Fine sediments are an important characteristic of estuarine systems upon which anthropogenic and natural activities depend. An important feature of fine sediments is their cohesiveness, following which individual particles aggregate into the so-called flocs or break-up due to turbulent motions. Throughout the flocculation process (aggregation and break-up), flocs change their properties of size, density and settling velocity with consequences on suspended sediment transport, prim

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Libri sul tema "Flocculation"

1

Hansjoachim, Stechemesser, and Dobiáš B, eds. Coagulation and flocculation. 2nd ed. Taylor & Francis, 2005.

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2

A, Amirtharajah, Clark Mark M, Trussell R. Rhodes, and AWWA Research Foundation, eds. Mixing in coagulation and flocculation. The Foundation, 1991.

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3

Ruan, Zhuen. Flocculation Behavior of Full Tailings. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-1100-3.

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4

Kleine, Ulrich. Der Einfluss der Flockenbildungsbeanspruchung auf die Festigkeit und das Sedimentationsverhalten von Flocken bei der Zentrifugalabscheidung. Universität Karlsruhe, 1992.

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5

Blanco, Angeles. Developments in flocculation: A literature review. Pira International, 2001.

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6

Mines, USDI Bureau of. Improved flocculation method for dewatering coal. s.n, 1985.

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7

International Symposium on Flocculation in Biotechnology and Separation Systems (1986 San Francisco). Flocculation in biotechnology and separation systems. Elsevier, 1987.

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8

Cikcik, Ali. Magnetic flocculation of weakly magnetic minerals. University of Birmingham, 1985.

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9

B, Dobiáš, ed. Coagulation and flocculation: Theory and applications. M. Dekker, 1993.

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10

Dippenaar, Andre. Shear flocculation of fines for improved flotation. Mintek (Mineral and Process Chemistry Division), printed and published by The Council for Mineral Technology, 1985.

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Capitoli di libri sul tema "Flocculation"

1

Marquez, Dorothy Joyce D. "Flocculation." In Encyclopedia of Estuaries. Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-8801-4_214.

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2

Gooch, Jan W. "Flocculation." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_5110.

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Gooch, Jan W. "Flocculation." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_13769.

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4

Paz, Carlota Garcia, Teresa Taboada Rodríguez, Valerie M. Behan‐Pelletier, et al. "Flocculation." In Encyclopedia of Soil Science. Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-3995-9_229.

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5

Gregory, John. "Flocculation Fundamentals." In Encyclopedia of Colloid and Interface Science. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-20665-8_17.

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Marquez, Dorothy Joyce D. "Estuarine Flocculation." In Encyclopedia of Estuaries. Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-8801-4_215.

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Gregory, John. "Flocculation Measurement Techniques." In Encyclopedia of Colloid and Interface Science. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-20665-8_172.

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Verma, Subhash. "Coagulation and Flocculation." In Math Problems in Water and Wastewater. CRC Press, 2024. http://dx.doi.org/10.1201/9781003468745-19.

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Verma, Subhash. "Coagulation and Flocculation." In Water and Wastewater Engineering Technology. CRC Press, 2023. http://dx.doi.org/10.1201/9781003347941-10.

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Xin, Tan, and Xu Kuangdi. "Shear-Flocculation Flotation." In The ECPH Encyclopedia of Mining and Metallurgy. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-0740-1_568-1.

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Atti di convegni sul tema "Flocculation"

1

Rong, J. "Flocculation Synergism NTP Purification of Emulsified Oil-bearing Wastewater." In 2024 IEEE International Conference on Plasma Science (ICOPS). IEEE, 2024. http://dx.doi.org/10.1109/icops58192.2024.10626294.

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2

Dmitrović, Selena, Ivana Danilov, Vanja Vlajkov, et al. "POSSIBILITY OF USING EGG SHELL AS A FLOCCULANT TO HARVEST BIOMASS OF Bacillus sp. FOLLOWING BIOTECHNOLOGICAL TREATMENT OF FOOD SECTOR WASTEWATERS." In 2nd International Symposium on Biotechnology. University of Kragujevac, Faculty of Agronomy, 2024. http://dx.doi.org/10.46793/sbt29.35sd.

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The aim of this study was to asses the ability of egg shell flocculation to recover bacterial Bacillus sp. BioSol021 biomass from the broth after biological treatment of wastewaters from the dairy, wine and fruit juice industries. Different concentrations of flocculant were used to estimate the effect of egg shell dosage on flocculation efficiency and antimicrobial activity against Aspergillus flavus, i.e., inhibition zone diameter. The maximum values for flocculation efficiency and inhibition zone diameter (antimicrobial activity against Aspergillus flavus) for cheese whey effluent were 94.02

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3

Cheng, Lun K., and Uilke Stelwagen. "Fiber optic flocculation sensor." In Optical Tools for Manufacturing and Advanced Automation, edited by John W. Berthold III, Richard O. Claus, Michael A. Marcus, and Robert S. Rogowski. SPIE, 1994. http://dx.doi.org/10.1117/12.166846.

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4

Yan, Bipeng, and Feng Shen. "Numerical Modeling and Experimental Study of the Mechanical Flocculation Process." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-03021.

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Flow characteristics are one of the main factors affecting the flocculation process. The flow field in the flocculation tank was numerically modeled using the κ-ε turbulent flow model by considering different hydraulic conditions such as the flow rate, paddle rotating speed, dimension and its installation positions. The numerical modeling and experiment observation indicates that the turbulent momentum κ and effective energy consumption ε can be used as an indicator of flocculation efficiency. The rectangular shaped flocculation tank can dampen the flow effectively, but in the four corners the

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5

Kerekes, R. J., R. M. Soszynski, and P. A. Tam Doo. "The Flocculation of Pulp Fibres." In Papermaking Raw Materials, edited by V. Punton. Fundamental Research Committee (FRC), Manchester, 1985. http://dx.doi.org/10.15376/frc.1985.1.265.

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This paper reviews current knowledge of pulp flocculation over the entire range of consistency found in pulping and papermaking, from dilute suspensions of fibres in water to dry fibres suspended in air. Some of the key factors that govern flocculation in low consistency aqueous suspensions are shown to apply with changing emphasis over the entire consistency range. Several recent findings from our laboratory that fill gaps in current knowledge are also reported.

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Gorres, J., H. W. Kropholler, and P. Luner. "Measuring Flocculation Using Image Analysis." In Papermaking Raw Materials, edited by V. Punton. Fundamental Research Committee (FRC), Manchester, 1985. http://dx.doi.org/10.15376/frc.1985.1.363.

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Experimental and theoretical measures of flocculation were studied using image analysis. An experimental study of commercial board samples led to the proposal of three descriptive floc features, namely, size, ‘definition’, and contrast. Numerical values were obtained from an ensemble averaged linear auto-correlation function. In addition a theoretical model of formation was simulated to compare degrees of flocculation. The theoretical structure was created by using a poisson cluster model in conjunction with a coverage model. This led to the superposition of fibrous micro0-flocs whose flock ce

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7

Hanhui, Zhan, Zhang Xiaoqi, Luo Dingti, and Hu Yuehua. "Coagu-Flocculation Mechanism and Experimental Study." In World Water and Environmental Resources Congress 2004. American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40737(2004)338.

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Idžakovičová, K., V. Bílek, J. Haidl, M. Isoz, and M. Pivokonský. "Flow Simulations Approach for Flocculation Tanks." In Topical Problems of Fluid Mechanics 2024. Institute of Thermomechanics of the Czech Academy of Sciences; CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics, 2024. http://dx.doi.org/10.14311/tpfm.2024.011.

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Flocculation in water treatment facilities plays a key role in the separation of colloidal inorganic and organic substances. Its optimization leads to a significant increase in its efficiency and savings of operational costs. However, it is currently based on trial-and-error experimental approaches. In this contribution, we focus on flow modeling in stirred flocculation tanks that would, after coupling with a calibrated model of particle aggregation, enable simulationbased flocculation optimization. Despite the abundance of literature on stirred tank modeling, there is no universal agreement o

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Manaf, Febina A., and Priya K. L. "Influence of Heavy Metals and Non-Cohesive Sediments on the Flocculation Behavior of Kaolin." In 6th International Conference on Modeling and Simulation in Civil Engineering. AIJR Publisher, 2023. http://dx.doi.org/10.21467/proceedings.156.2.

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Flocculation of cohesive sediments are affected by various physical, chemical and biological factors. The present study investigated the effect of heavy metals on the flocculation of cohesive sediments and its resistance to breakage under the shear imparted by sand. Experimental investigations were conducted in a flocculator with varying speed agitator for various concentrations of Fe (II) (0mg/L, 0.1mg/L, 0.5mg/L, 1mg/L, 5mg/L, 10mg/L and 20mg/L) and sand (0%,10%,30%,40% and 50%) under different salinity conditions (0g/L, 15g/L and 30g/L). The floc characteristics were obtained using an image

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Leinweber, Matthias, Patrick Bitter, Stefan Brueckner, Hans-Ulrich Moesch, Peter Lenz, and Bernd Freisleben. "GPU-Based Simulation of Yeast Cell Flocculation." In 2014 22nd Euromicro International Conference on Parallel, Distributed and Network-Based Processing (PDP). IEEE, 2014. http://dx.doi.org/10.1109/pdp.2014.65.

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Rapporti di organizzazioni sul tema "Flocculation"

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Thomas, Catherine C., Jonathan Broussard, and Victor F. Medina. Chitosan as a Coagulant and Precipitant of Algae Present in Backwater. U.S. Army Engineer Research and Development Center, 2022. http://dx.doi.org/10.21079/11681/44904.

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The purpose of this technical note (TN) is to highlight the current state of knowledge of algal flocculation by chitosan and identify data gaps existing between specific algal characteristics and chitosan binding efficiency. Published relationships and correlations between the quality of backwaters and the prevalence of algae, a baseline for flocculation efficiency of microalgae, and ideal treatment instances for algal removal by way of chitosan flocculation and precipitation will be identified.

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2

Wilmarth, W. R. Desilication from DWPF Recycle using Ferric Flocculation. Office of Scientific and Technical Information (OSTI), 2002. http://dx.doi.org/10.2172/803617.

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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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Cender, Clinton, Catherine Thomas, Martin Page, et al. Rapid algae flotation techniques. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/47704.

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Dissolved air flotation (DAF) is an effective technique for algae separation following the application of flocculants and coagulants. Some harmful algae produce mucilage or extracellular polymeric substances useful for flotation. This study evaluated natural polysaccharides to determine effects on algal flotation with DAF. Food-grade gums (xanthan gum, guar gum, gum arabic, gellan gum, and diutan gum) were tested with cyanobacteria cultures singly and in combination with commercial flocculants (including Tramfloc 222 and Tramfloc 300). Gum arabic alone had no effect when evaluated at concentra

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Somasundaran, P. Flotation and flocculation chemistry of coal and oxidized coals. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6471008.

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Somasundaran, P., and R. Ramesh. Flotation and flocculation chemistry of coal and oxidized coals. Office of Scientific and Technical Information (OSTI), 1989. http://dx.doi.org/10.2172/5632118.

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7

Moudgil, B. M. A new approach in ultrapurification of coal by selective flocculation. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/5925605.

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Moudgil, B. A new approach in ultrapurification of coal by selective flocculation. Office of Scientific and Technical Information (OSTI), 1989. http://dx.doi.org/10.2172/5143601.

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9

Moudgil, B. M. A new approach in ultrapurification of coal by selective flocculation. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/5164035.

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10

Lalvani, S. Coal flotation and flocculation in the presence of humic acids. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6991451.

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