Relevant bibliographies by topics / Deflocculation

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Deflocculation'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 July 2025

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Journal articles on the topic "Deflocculation"

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Henriques, I. D. S., R. T. Kelly, and N. G. Love. "Deflocculation effects due to chemical perturbations in sequencing batch reactors." Water Science and Technology 50, no. 10 (2004): 287–94. http://dx.doi.org/10.2166/wst.2004.0662.

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Toxic shock-induced deflocculation was examined for activated sludge exposed to six different classes of industrially relevant chemical toxins: an electrophilic solvent (1-chloro-2,4-dinitrobenzene, CDNB), a heavy metal (cadmium), a hydrophobic chemical (1-octanol), an uncoupling agent (2,4-initrophenol, DNP), alkaline pH, and weakly complexed cyanide. The concentrations required to inhibit respiration by 50% were used to shock sequencing batch reactors (SBRs) containing a nitrifying (10-day solids retention time (SRT)) and a non-nitrifying (2-day SRT) biomass. Effluent total suspended solids
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Zhang, Y., and D. G. Allen. "Strategies for minimizing deflocculation of biosolids due to oxygen disturbances." Water Science and Technology 55, no. 6 (2007): 173–80. http://dx.doi.org/10.2166/wst.2007.226.

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The objective of this paper is to identify deflocculation under short-term disturbances of dissolved oxygen (DO) in a continuous system, and to explore the strategies for minimizing the carry-over of biosolids. Sludge deflocculation was examined in four parallel sequencing batch reactors (SBRs) fed with primary treated effluents from a bleached kraft pulp and paper mill. Results show that the DO transients caused a reduction of soluble COD (SCOD) removal efficiency by 50–70%, increases in suspended solid (SS) concentration and turbidity by more than 100%. Under the DO disturbances, the ratio o
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Delavi, D. G. G., A. De Noni, and D. Hotza. "Deflocculant consumption of clay suspensions as a function of specific surface area and cation exchange capacity." Clay Minerals 48, no. 3 (2013): 473–80. http://dx.doi.org/10.1180/claymin.2013.048.3.04.

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AbstractCeramic tile production by the wet route requires clay suspensions with a high solid content and low viscosity. In this work the deflocculation of clays in aqueous suspensions was investigated by varying the type of clay and additive. Three kaolinitic and two illitic clays were characterized and dispersed with deflocculants based on lithium, sodium and potassium silicates and polyacrylates. The clays were characterized by chemical and mineralogical analyses, particle size distribution, zeta potential, organic carbon content, cation exchange capacity (CEC) and specific surface area (BET
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Morgan-Sagastume, F., and D. Grant Allen. "The assessment of different operating strategies for minimising activated sludge deflocculation under temperature transient conditions." Water Science and Technology 50, no. 3 (2004): 67–77. http://dx.doi.org/10.2166/wst.2004.0165.

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Three operating strategies were tested for decreasing activated sludge deflocculation due to temperature shifts from 30° to 45°C: magnesium sludge enrichment, increased sludge retention time (33 d), and spikes of an easily degradable substrate (methanol). The temperature shifts were conducted sequentially in 4 parallel lab-scale sequencing batch reactors (SBRs) treating kraft pulp mill effluent. Three SBRs operated at an SRT = 20 days, and in one of them the sludge was not manipulated, thus, serving as a reference SBR. The temperature shift was associated with decreased soluble chemical oxygen
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Abdulkarim, Mubarak, Haruna M. Grema, Ibrahim H. Adamu, et al. "Effect of Using Different Chemical Dispersing Agents in Grain Size Analyses of Fluvial Sediments via Laser Diffraction Spectrometry." Methods and Protocols 4, no. 3 (2021): 44. http://dx.doi.org/10.3390/mps4030044.

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Laser diffraction spectrometry allows for efficiently obtaining high-resolution grain size data. However, pretreatment and dispersion of aggregates in sediment samples are essential pre-requisites for acquiring accurate results using this method. This study evaluates the effectiveness of five dispersing agents in deflocculating the investigated fluvial sediments and the resulting grain size distribution obtained by laser diffraction spectrometry. We also examine the ability of the different dispersing agents to deflocculate sediment samples treated by thermal combustion. Distilled water presen
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Bott, Charles B., and Nancy G. Love. "Implicating the Glutathione-Gated Potassium Efflux System as a Cause of Electrophile-Induced Activated Sludge Deflocculation." Applied and Environmental Microbiology 70, no. 9 (2004): 5569–78. http://dx.doi.org/10.1128/aem.70.9.5569-5578.2004.

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ABSTRACT The glutathione-gated K+ efflux (GGKE) system represents a protective microbial stress response that is activated by electrophilic or thiol-reactive stressors. It was hypothesized that efflux of cytoplasmic K+ occurs in activated sludge communities in response to shock loads of industrially relevant electrophilic chemicals and results in significant deflocculation. Novosphingobium capsulatum, a bacterium consistent with others found in activated sludge treatment systems, responded to electrophilic thiol reactants with rapid efflux of up to 80% of its cytoplasmic K+ pool. Furthermore,
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Liu, Yang Qiao, and Lian Gao. "Deflocculation of Alumina Suspensions Using Polyelectrolyte Dispersants." Key Engineering Materials 352 (August 2007): 81–84. http://dx.doi.org/10.4028/www.scientific.net/kem.352.81.

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In this paper, the dispersing abilities of three polyelectrolytes, poly (acrylic acid), poly (acrylic acid-co-acrylate), and a four-member copolymer containing various anionic functional groups were tested for aqueous Al2O3 suspensions. The influence of the dispersants on the surface charge of the powder was evaluated by measuring the zeta potential in dilute Al2O3 suspensions. It was found that all the three dispersants shifted the isoelectric point to a lower pH value. Rheological measurements showed that the four-member dispersant decreased the viscosity in the widest pH range, which should
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Nagarajan, M. K. "Entflockung von Kaolinschlämmen / Deflocculation of Kaolinite Slurries." Tenside Surfactants Detergents 28, no. 4 (1991): 230–34. http://dx.doi.org/10.1515/tsd-1991-280404.

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Trimm, H. H., B. R. Jennings, and K. Parslow. "Colloid deflocculation detection by transient light scattering." Colloids and Surfaces 18, no. 1 (1986): 113–21. http://dx.doi.org/10.1016/0166-6622(86)80198-6.

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Li, Gang, Shu Hai Guo, Chun Shan Zhang, and Xi Lin Liu. "Treatment of Oily Sludge from Floatation Process: Floc Breakage and Dewatering." Advanced Materials Research 113-116 (June 2010): 579–83. http://dx.doi.org/10.4028/www.scientific.net/amr.113-116.579.

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The aim is to treat oily sludge from floatation process of oil produced water by deflocculation. Based upon analyzing the granularity distribution and dewater efficiency of the flocs, floc breakage and dewater of oily sludge was carried out. The results indicated that the coagulant skeleton builder in sludge could be broken by changing the coalescent state, and deflocculation could disrupt skeleton of the floc and release interstitial water in sludge. The highest dewatering efficiency is about 81.2% at the pH of 4.5 by gravity sedimentation. The sludge had a broader range of granularity distri
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Dissertations / Theses on the topic "Deflocculation"

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Shen, Xiaoteng. "Modeling flocculation and deflocculation processes of cohesive sediments." W&M ScholarWorks, 2016. https://scholarworks.wm.edu/etd/1539616853.

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The transport and fate of cohesive sediments are responsible for many engineering, environmental, economic and policy issues that relate to, for example, siltation and dredging in navigation channels, water quality, water turbidity, pollutant transports, and biological ecosystem responses. Our current understanding, however, is insufficient to conduct accurate quantitative predictions of these processes. This is because the cohesive particles in natural waters will flocculate, which determines the settling, and thus the deposition behaviors. The simulation of flocculation processes is a primar
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Wimmer, Robert Francis. "Development of a Biosensor to Predict Activated Sludge Deflocculation, and the Link Between Chlorination and Potassium Efflux." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/30839.

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In an effort to provide wastewater treatment operators with the capability to be proactive in assessing and solving deflocculation events, this study has tested the components of a biosensor to predict deflocculation and investigated the mechanistic cause of deflocculation relating to chlorination of activated sludge cultures. In order to effectively manage upset events, it is necessary to know the source of an upset and the causative mechanism that the source initiates. The Glutathione-gated potassium efflux (GGKE)induced activated sludge deflocculation biosensor incorporates novel microtech
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Liimatainen, H. (Henrikki). "Interactions between fibres, fines and fillers in papermaking:influence on dewatering and retention of pulp suspensions." Doctoral thesis, University of Oulu, 2009. http://urn.fi/urn:isbn:9789514292101.

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Abstract Interactions between the components of papermaking suspensions (e.g. fibres, fillers, fines and polymers) have a remarkable effect on various unit processes in papermaking. The filterability of fibre suspensions, which is a crucial property for example in paper sheet forming and solid recovery, is also known to be depended on particle interactions. However, due to the complex nature of the interactions, the role of these phenomena in fibre suspension filtration is still not fully understood. The focus of this thesis was to find out how phenomena associated to fibre flocculation, fibre
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Bott, Charles Briddell. "Elucidating the Role of Toxin-Induced Microbial Stress Responses in Biological Wastewater Treatment Process Upset." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/26641.

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The overall hypothesis of this work is that the physiological microbial stress response could serve as a rapid, sensitive, and mechanistically-based indicator of process upset in biological wastewater treatment systems that receive sporadic shock loads of toxic chemicals. The microbial stress response is a set of conserved and unique biochemical mechanisms that an organism activates or induces under adverse conditions, specifically for the protection of cellular components or the repair of damaged macromolecules. Using traditional immunochemical analysis techniques, the heat shock protein, G
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Sethna, Rustam Homi. "Fiber deflocculation." 1985. http://catalog.hathitrust.org/api/volumes/oclc/12727744.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1985.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 111-112).
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Choi, Jin-Yong. "pH-induced flocculation/deflocculation process for harvesting microalgae from water." Thesis, 2014. http://hdl.handle.net/2152/25946.

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Historically, the presence of microalgae (algae hereafter) in natural waters has been viewed as a nuisance due to its adverse impact on water quality. More recently, however, algae are being investigated as potential sources of biofuel and a range of natural products. These applications require the development of large-scale cultivation systems for mass production that include growth, harvesting, concentration, and product recovery components. While challenges still remain with respect to many of the processes involved in mass production, one of the most technically and economically challen
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Zhang, Yi. "Understanding Defloccation of Activated Sludge Under Transients of Short-term Low Dissolved Oxygen." Thesis, 2008. http://hdl.handle.net/1807/11283.

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Deflocculation is a common upset event in biological wastewater treatment plants and causes significant problems in biosolids discharge and environmental management. However, fundamental understanding of deflocculation is limited. The overall objective of this work was to explore the fundamentals for deflocculation under transients of short-term low dissolved oxygen (DO). The investigation was carried out in a sequence of batch and continuous experiments on activated sludge, followed by batch experiments on E. coli suspensions. Both batch and continuous experiments on activated sludge demons
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Pimenta, João Manuel Rosa. "Micronização de partículas num jet mil." Master's thesis, 2013. http://hdl.handle.net/10316/38864.

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Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra.<br>O objectivo deste trabalho consiste no estudo e análise do processo de micronização de partículas num jet mill. Este tipo de moinho permite a micronização de partículas micrométricas sem qualquer contaminação pelos materiais de moagem. O projecto deste tipo de equipamento foi efectuado com o recurso à modelação simples de movimento de partículas, no interior de um escoamento, aplicado à separação ciclónica. Os resultados numéricos provaram que estávamos em co
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Book chapters on the topic "Deflocculation"

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Gooch, Jan W. "Deflocculation." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_3367.

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Funk, James E., and Dennis R. Dinger. "Rheological Properties: Gelation and Deflocculation Curves." In Predictive Process Control of Crowded Particulate Suspensions. Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-3118-0_45.

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Liu, Yang Qiao, and Lian Gao. "Deflocculation of Alumina Suspensions Using Polyelectrolyte Dispersants." In Innovation in Ceramic Science and Engineering. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-454-5.81.

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Gooch, Jan W. "Deflocculating Agent." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_3366.

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Rands, J. G., R. A. Hodgkinson, A. A. Thorburn, and R. A. Chase. "The Breakdown of Field Drainage Systems due to Deflocculation in the Coastal Marshes of England. The Extent of the Problem and Possible Remedies." In Hydraulic Design in Water Resources Engineering: Land Drainage. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-662-22014-6_41.

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"Deflocculation." In Encyclopedia of Agrophysics. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-3585-1_586.

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"deflocculation." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_40803.

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"Deflocculation." In Encyclopedic Dictionary of Polymers. Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_3313.

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"deflocculation, n." In Oxford English Dictionary, 3rd ed. Oxford University Press, 2023. http://dx.doi.org/10.1093/oed/9728272190.

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Grant Allen, D., and Fernando Morgan-Sagastume. "Impact Of Stresses Or Transient Conditions On Deflocculation In Engineered Microbial Systems." In Flocculation in Natural and Engineered Environmental Systems. CRC Press, 2004. http://dx.doi.org/10.1201/9780203485330.ch17.

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Conference papers on the topic "Deflocculation"

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ReboIa, M. Margarida L. F. L., M. Graca B. V. Rasteiro, and Fernando Pita. "Flocculation/Deflocculation Studies Of Kaolin Suspensions Using LDS." In Laser Technologies in Industry. SPIE, 1988. http://dx.doi.org/10.1117/12.968876.

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"Application of Deflocculation Test to Characterise the Admixture Plasticizer and Superplasticizer Effect in Different Cements." In SP-173: Fifth CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete. American Concrete Institute, 1997. http://dx.doi.org/10.14359/6214.

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Ghazali, Nurul Aimi, Shigemi Naganawa, Yoshihiro Masuda, Wan Asma Ibrahim, and Noor Fitrah Abu Bakar. "Eco-Friendly Drilling Fluid Deflocculant for Drilling High Temperature Well: A Review." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-78149.

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Conventional clay-based drilling fluids often experienced difficulties in controlling the rheological properties, gelation, and filtration due to flocculation of clay at the temperature higher than 121°C. Deflocculant or thinner, one of the drilling fluid additives, serves a significant role in preventing the association of clay particles particularly in high temperature environments such as high-pressure and high-temperature (HPHT) deep-water drilling. Lignosulfonate has been commonly used in the industry as deflocculant for clay-based drilling fluids since the late 1950s as a replacement for
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Norman, Bo, and Daniel Söderberg. "Overview of Forming Literature, 1990-2000." In The Science of Papermaking, edited by C. F. Baker. Fundamental Research Committee (FRC), Manchester, 2001. http://dx.doi.org/10.15376/frc.2001.1.431.

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Paper structure characterisation has been extended to include 2-D formation and periodic marks as well as wavelet techniques. Local fibre orientation anisotropy and misalignment angle analysis, in combination with tape-splitting layering and image analysis have improved the understanding of the relationship between paper structure and properties as well as increased the possibilities to trace the forming history from final paper structure. The Crowding Factor has been introduced, to describe the tendency of fibre suspensions to form fibre flocs. It gives an improved predictability in compariso
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