flocculator Articles

  • Evaluation of the flocculation and de-flocculation performance and mechanism of polymer flocculants

    Understanding the interaction mechanism between polymeric flocculants and solid particles in two oppositely charged solutions: bentonite and calcium fluoride, is of great practical and fundamental importance. In this work, inorganic flocculants based on aluminum(III) or iron(III); cationic, anionic and non-ionic organic flocculants were used. The solution pH, which highly influenced the ...


    By IWA Publishing

  • Industrial Wastewater Treatment - Paint/Pigment Dye Industry

    Innovation in Industrial Wastewater Treatment - Sustainable Water Reuse Strategies Applied to the Paint/Pigment Dye Industry Introduction The paint/pigment industry is a large consumer of process and wash water to be used in various water based paint pigment products. The water usage for this industry is estimated at 75-85 million gallons per day, with ...

  • The flocculation mechanism and treatment of oily wastewater by flocculation

    In the present study, the performance of compound flocculants composed of different concentrations of polyaluminum chloride (PAC) and cationic polyacrylamide (CPAM), the influencing mechanism of the flocculation process and the effects of temperature, settling time, and speed and time of stirring were investigated. The results show that the poor water quality with high concentrations of oil, ...


    By IWA Publishing

  • Coagulation, flocculation and agglomeration

    Agglomeration Agglomeration refers to the formation of more or less firmly bound primary particles by collision processes between primary particles, primary particles and agglomerates, as well as pre-existing agglomerates. The agglomeration consists of a destabilization and a transport process. The destabilization is divided into coagulation and flocculation. In general, both ...

  • Biodegradable flocculants: Power of `natto`

    Just by adding and stirring (1 agent, 1 process) 'PG alpha 21Ca' to polluted water, it separates supernatant water with better turbidity, BOD, and COD, and sediments in a short time. This high-molecular flocculent adsorbs strongly the exogenous incretion disturbance substance (Environmental hormone ), like dioxin. By using this high-molecular flocculent, it is possible to draw and collect ...


    By Poly Glu USA

  • Coagulation and flocculation in water and wastewater treatment

    Coagulation and flocculation are an essential part of drinking water treatment as well as wastewater treatment.  This article provides an overview of the processes and looks at the latest thinking.  Material for this article was largely taken from reference (1). Coagulation and flocculation are essential processes in various disciplines. In potable water treatment, ...


    By IWA Publishing

  • The feasibility of flocculation in a storage sedimentation basin

    ABSTRACTFor the Flemish situation, storage sedimentation basins are one of the best 'end-of-pipe' solutions to reduce the impact of combined sewer overflows on the receiving waters. In some cases, when the spilled pollution load is too high, the settling efficiency of the basin has to be improved. Adding coagulants could be a reasonable alternative for building larger basins. To estimate the ...


    By IWA Publishing

  • Starch degradation and intermediate dynamics in flocculated and dispersed microcosms

    A large fraction of the organic substrate in municipal wastewater is particulate. Prior to uptake, particles have to be degraded through potentially a range of intermediates. However, research on intermediate dynamics during particle hydrolysis is limited. In this paper, batch experiments on flocculated and dispersed biomass microcosms using starch as particulate substrate are reported. ...


    By IWA Publishing

  • Suitability of cationic flocculants for RO membranes performance improvement

    Abstract As it has already been published and demonstrated, one of the main causes of membranes failures is related to a poor plant pre-treatment. Data from more than 600 autopsies demonstrated that both biofilm and colloidal matter are the most common components on RO (reverse osmosis) membranes fouling, therefore, main lack on membranes pre-treatment is related to disinfection and ...

  • Flocculation of a lactic acid fermentation broth by gelatin

    In the current study, flocculation of a lactic acid (LA) fermentation broth with three kinds of flocculants was performed in order to reduce membrane pollution during its subsequent electrodialysis. Gelatin was selected as the most suitable flocculant in comparison with others in terms of flocculation rate (FR), suspended solid (SS) removal rate, and filtration flux of the supernatant. Optimal ...


    By Inderscience Publishers

  • Cactus Opuntia as natural flocculant for urban wastewater treatment

    The cactus tree, species Opuntia ficus-indica, is a primary material of many products in various domains such as cosmetics, medicine and nutrition. In the present work, we assess its potential as a flocculant. We tried a technique which adopts three sequential treatments that used coagulation, flocculation and sedimentation processes under certain operating conditions. For this purpose, we ...


    By IWA Publishing

  • Whitepaper: Chemical-physical Water Treatment, Filtration and Flocculation

    Introduction In water treatment plants chemical-physical processes play an essential part in the process chain. They are successfully employed in the pre- and post-treatment of waters of different origins, as well as of other process liquids. In this regard the removal of particles by filtration is a central step. Classical filtration processes are used for particles ranging from ...


    By EnviroChemie GmbH

  • Coagulation and flocculation in the Helsinki drinking water treatment plant

    The raw water for Finland’s capital Helsinki is pumped from Lake Päijänne, located approximately 120 km away, via a tunnel to two water treatment plants, where it is treated and purified. This secures sufficient drinking water of excellent quality for around one million people. In the drinking water treatment plant in Vanhakaupunki 18 HYPERCLASSIC® Evolution7 mixers and three ...

  • Preparation and application of a new composite chitosan flocculant

    A new composite chitosan flocculant has been prepared, and its optimal dosage in the treatment of sewage established. It significantly improves the removal of chemical oxygen demand, suspended solids and aluminium ions from water. Compared with the traditional flocculant polyaluminium chloride, the cost of the composite flocculant was lower and it produced less pollution.Keywords: chitosan, ...


    By Inderscience Publishers

  • The safe use of cationic flocculants with reverse osmosis membranes

    Abstract Flocculants are used in combination with coagulants to agglomerate suspended particles for removal by filtration. This technique is used extensively in all types of surface waters to reduce the silt density index (SDI) and minimise membrane fouling. Although organic cationic flocculants are particularly effective, their widespread use in membrane applications is limited ...

  • A novel poly(acrylic acid-co-acrylamide)/diatomite composite flocculant with outstanding flocculation performance

    Series of anionic flocculants with outstanding flocculation performance, poly(acrylic acid-co-acrylamide)/diatomite composite flocculants (PAAD) were successfully prepared through aqueous solution copolymerization and applied to flocculate from oil-field fracturing waste-water. The structure of PAAD was characterized by Fourier transform infra-red spectroscopy , 13C nuclear magnetic resonance ...


    By IWA Publishing

  • Strong selection pressures impact the capacity of flocculating activated sludge bacteria to granulate

    The capacity of activated sludge (AS) microbial populations to form dense granules offers the potential to establish efficiently settleable biomass. This has the potential to circumvent problems around ineffective solids–liquid separation and sensitivity to variable chemical oxygen demand (COD) loads. Although a number of studies have evaluated aerobic laboratory granulation reactors as ...


    By IWA Publishing

  • Flocculation performance of magnetic particles with high-turbidity surface water

    The sharp increase in raw-water turbidity following heavy rain presents considerable treatment problems due to low sedimentation rates. The objective of this study was to evaluate the removal of negatively charged suspended solids (SS) in surface water treatment using magnetic particles (nFeO; FeO · Fe2O3) synthesised in our laboratory. The performance of nFeO in removing ...


    By IWA Publishing

  • Hydrodynamic evaluation of the influence of outlet configuration for mechanical flocculation facilities

    This paper focuses on hydrodynamic research aiming at the short-circuit evaluation of five different outlet configurations through the compartments of a mechanical flocculation unit of vertical shaft with mixing paddles at pilot scale. The tests were carried out with two, three and four compartments, variable and constant velocity gradients, including alternating senses of paddle rotation ...


    By IWA Publishing

  • Flocculation properties of a bioflocculant produced by Bacillus licheniformis

    Studies of the flocculation properties of bioflocculant combined with its structure characterization are helpful to develop more effective bioflocculant. This paper reports findings of our research on the flocculation properties of the bioflocculant ZS-7 in the kaolin suspension based on its structure characterization. With the addition of 2 mg/L ZS-7 and 9 mM CaCl2, the optimum temperature for ...


    By IWA Publishing

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