coagulation and flocculation Articles

  • Prediction of coagulation and flocculation processes using ANN models and fuzzy regression

    Coagulation and flocculation are two main processes used to integrate colloidal particles into larger particles and are two main stages of primary water treatment. Coagulation and flocculation processes are only needed when colloidal particles are a significant part of the total suspended solid fraction. Our objective was to predict turbidity of water after the coagulation and flocculation ...


    By IWA Publishing

  • Treatment of biologically treated leachate by oxidation and coagulation

    This work aims to investigate removal efficiency of oxidation and coagulation/flocculation processes, to provide an effective method for the treatment of biologically pre-treated leachate. Leachate containing 985 mg L−1 COD was treated by using three treatment schemes, i.e. oxidation, coagulation/flocculation and the combined process of coagulation/flocculation followed by oxidation. The ...


    By IWA Publishing

  • Cactus juice as bioflocculant in the coagulation–flocculation process for industrial wastewater treatment: a comparative study with polyacrylamide

    Most industries in the world treat their wastewaters with a conventional coagulation–flocculation process using alum as coagulant, polyacrylamide (PAM) as flocculant and lime as coagulant aid. To reduce the use of chemical products in the process, experiments were conducted to substitute the PAM with cactus juice (CJ) as flocculant. From the obtained data, it was concluded that the ...


    By IWA Publishing

  • Removal of Organics and Nutrients from the Combined Sewage in Shanghai Using Coagulation-Flocculation Process

    Organics and nutrients removal by coagulation-flocculation process using polyaluminiumferric chloride and its aids, applied to a combined sewage in Shanghai, were studied. Cationic polyacrylamide (PAM), polyvinyl alcohol (PVA), a new type of polyelectrolyte (AN) and activated silica (AS) were used as coagulant aids. Performances were measured under optimum conditions for the polyaluminium-ferric ...

  • 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

  • Sequential treatment of an old-landfill leachate

    This work investigates the performance of combined techniques applied to the treatment of an old-landfill leachate, which presents high salinity, low biodegradability (BOD5/COD around 0.05) and high ammonia concentration. Three sequences of processes were employed, including coagulation/flocculation, chemical oxidation, biological treatment and ammonia stripping. The association of ...


    By Inderscience Publishers

  • A new strategy for treating a cotton dyeing wastewater – integration of physical-chemical and advanced oxidation processes

    New strategies were herein applied for treating a cotton dyeing wastewater: coagulation/flocculation followed by Fenton’s oxidation – approach 1, Fenton process per se – approach 2, and Fenton followed by coagulation/flocculation – approach 3, aiming reducing chemicals consumption. Regarding the cost analysis, which is crucial for deciding on the best strategy to implement, it was found that ...


    By Inderscience Publishers

  • Case Study: Iron Foundry

    The foundry recycles engine blocks to make iron pipe. They have a 350-gpm closed loop water reuse system that is used to cool the molds as part of the manufacturing process. The facility was using a coagulant and a flocculant to try and reduce the solids carryover from their clarifier. The solids in the reuse water were building up in their system filters causing intermittent downtime (downtime ...


    By Integrated Engineers Inc.

  • Light Industrial Laundry

    A smaller laundry treating 30,000 gallons/day of wastewater was using conventional chemistry with sulfuric acid to drop the pH to 7.5, addition of a coagulant, and a flocculent. The facility has been under pressure from the POTW to reduce the electroconductivity (EC) levels. Past analytical data has shown that the EC levels have averaged 2,100 μohms/cm from the addition of the laundry ...


    By Integrated Engineers Inc.

  • Preparation and characterization of polymeric phosphate-aluminum sulphate for source water treatment

    Aluminum sulphate (AS) as a common coagulant has been widely used in water treatment. Pre-hydrolysed AS (PAS) has higher molecular weight, presenting stronger water treatment performance; however, its poor stability has greatly limited its application. Therefore, there is still a need to obtain a stable PAS. In this study, a method for stabilizing PAS product was proposed and a new coagulant, ...


    By IWA Publishing

  • Evaluation of acute ecotoxicity removal from industrial wastewater using a battery of rapid bioassays

    The present study compares conventional wastewater treatment technologies (coagulation–flocculation and activated sludge) and powdered activated carbon (PAC) treatment for the removal of acute ecotoxicity from wastewater generated by tank truck cleaning (TTC) processes. Ecotoxicity was assessed with a battery of four commercially available rapid biological toxicity testing systems, ...


    By IWA Publishing

  • Removal of norovirus from water by coagulation, flocculation and sedimentation processes

    In this study, we determined the removal of a prototype human norovirus (Norwalk virus, NV) by bench-scale alum coagulation, flocculation and sedimentation processes using reverse transcriptase polymerase chain reaction (RT-PCR) for norovirus assays. After determining optimum conditions for the coagulation, flocculation and sedimentation processes in terms of turbidity reduction, jar tests were ...


    By IWA Publishing

  • Landfill leachate treatment

    BOYDEL is pleased to confirm that we have produced great results running a heavily fuel and metals laced municipal landfill leachate through our LMR electrocoagulation reactor. The attached picture essentially speaks for itself except that the clear BOYDEL treated effluent is free of fuel smell and that the sludge depicted on the right side of the picture has not been further dewatered and is ...

  • Effect of coagulant and flocculant addition scheme on the treatment of dairy farm wastewater

    Our group was approached by a manufacturer of treatment trains to recycle wastewater from dairy farm manure. Company X treatment trains consist of microscreening, sedimentation and filtration units attached to a reverse osmosis (RO) membrane. To enhance screening, a coagulant and a flocculant are added to the stream feeding the microscreen. However, their customers experience foaming on the ...


    By IWA Publishing

  • How can drinking water treatments influence chlorine dioxide consumption and by-product formation in final disinfection?

    In this study water samples of different origins (subalpine lake, artificial lake and river) were treated by pre-oxidation, coagulation/flocculation, adsorption on granular activated carbon and disinfection. Different laboratory-scale tests were carried out to evaluate the treatment impact on ClO2 consumption in disinfection and on the formation of disinfection by-products (trihalomethanes, ...


    By IWA Publishing

  • Auxipó as auxiliary agent of coagulation for pulp and paper industry wastewater

    The aim of this paper is to prove the applicability of Auxipó as an auxiliary agent of coagulation for pulp and paper industry wastewater. Thus, it is possible to clarify the effluent more efficiently before launching it in waterbodies. To test the applicability of the auxiliary agent of coagulation, two coagulation and flocculation assay diagrams were developed: the first diagram only shows ...


    By IWA Publishing

  • Use of chitosan in coagulation flocculation of raw water of Keddara and Beni Amrane dams

    The effectiveness of chitosan as a coagulant flocculant in surface water treatment has been studied. Tests were carried out in laboratory on treated and raw water. The treated water was mixed with high and low concentrations of bentonite to simulate turbid water. This treated water provides from water treatment plant of Algiers (Boudouaou site) which is supplied by both dams of Keddara and Beni ...


    By IWA Publishing

  • Color removal from industrial wastewater with a novel coagulant flocculant formulation

    Abstract: Chemically enhanced wastewater treatment is attracting substantial interest among the currently employed chemical unit processes in wastewater treatment. Coagulation-flocculation has received considerable attention for yielding high pollutant removal, especially color removal. This investigation presents a novel formulation of coagulation-flocculation for color removal from industrial ...

  • Latex Paint Manufacturer-1

    The paint manufacturing facility was using 1 MGD of fresh water in the manufacturing process with a majority of the water being used for tank and pipe cleaning. As a cost cutting measure, the facility wanted to reduce the water consumption and reuse part, if not all of the wastewater. They tried several different combinations of coagulants and flocculants with limited success. Integrated ...


    By Integrated Engineers Inc.

  • The use of response surface methodology for modelling and analysis of water and wastewater treatment processes: a review

    In recent years, response surface methodology (RSM) has been used for modelling and optimising a variety of water and wastewater treatment processes. RSM is a collection of mathematical and statistical techniques for building models, evaluating the effects of several variables, and obtaining the values of process variables that produce desirable values of the response. This paper reviews the ...


    By IWA Publishing

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