cationic coagulant Articles

  • The effectiveness of humic acid coagulation with the use of cationic polyacrylamides

    The chemical coagulation process is a popular method for eliminating the precursors of disinfection by-products. This study presents the results of a laboratory experiment which investigates the use of cationic polyacrylamide copolymers (CPAMs) as primary coagulants in the purification of solutions containing humic acids (HA). A number of polymers with various molecular weight and charge density ...


    By IWA Publishing

  • The effectiveness of humic acids coagulation with the use of cationic polyacrylamides

    The chemical coagulation process is a popular method for eliminating the precursors of disinfection by-products. This study presents the results of a laboratory experiment which investigates the use of cationic polyacrylamide copolymers (CPAMs) as primary coagulants in the purification of solutions containing humic acids (HA). A number of polymers with various molecular weight and charge density ...


    By IWA Publishing

  • Integrated Engineers Case Study: Circuit Board Manufacturer

    A circuit board manufacturer in southern California was not able to achieve the discharge levels of copper and nickel with their existing system of coagulant, anionic and cationic flocculants and metal precipitant treatment process followed by lamella plate clarification. The previous treatment process developed a settled sludge that had poor shear characteristics and required further coagulant ...


    By Integrated Engineers Inc.

  • Corn starch-based treatment improves rainwater quality

    Rainwater harvesting can provide an alternative water source, which may demand little treatment, depending on the end use. Some starches have been used in water treatment as coagulant/flocculant/filtration aid, and might be applied as primary coagulant. Here, we show direct filtration with hydraulic rapid mixing, using 2–6 mg L−1 cationic corn starch as primary coagulant, considerably improves ...


    By IWA Publishing

  • Assessment of biologically active GAC and complementary technologies for gray water treatment

    The reuse of gray water for applications ranging from irrigation to showering is a viable means to reduce net water demand when water supplies are stressed. The objective of this study was to investigate the treatment of gray water using biologically active granular-activated carbon (GAC) and complementary technologies. Technologies were challenged individually or in combination using a ...


    By IWA Publishing

  • Treatment of oilfield wastewater by combined process of micro-electrolysis, Fenton oxidation and coagulation

    In this study, a combined process was developed that included micro-electrolysis, Fenton oxidation and coagulation to treat oilfield fracturing wastewater. Micro-electrolysis and Fenton oxidation were applied to reduce chemical oxygen demand (COD) organic load and to enhance organic components gradability, respectively. Orthogonal experiment were employed to investigate the influence factors ...


    By IWA Publishing

  • Removing Dissolved Copper from wastewater effluent

    Removing Dissolved Copper in Wastewater Treatment Plant How do you meet your dissolved copper discharge limit if it is 1.6 ppb, 3.1 ppb or 6.1 ppb? What is the cost to achieve these limits? Which treatment is cost effective? Is deionization, Reverse Osmosis or chemical precipitation the best alternative to low level of dissolved copper in a wastewater system? Is it cost effective to run a ...


    By Jenfitch, LLC

  • Chemical pretreatment of combined sewer overflows for improved UV disinfection

    The aim of this research was to better understand chemical pre-treatment of combined sewer overflows (CSOs) for subsequent ultraviolet (UV) disinfection. Approximately 200 jar tests were completed. Alum (Al2(S04)3·12H2O) resulted in a higher UV light transmission (UVT), and equivalent total suspended solids (TSS) removal, than ferric chloride (FeCl3). An ...


    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 ...

  • Application of PAC and flocculants for improving settling of solid particles in oilfield wastewater with high salinity and Ca2+

    The suspended solids in wastewater from Rekabak oilfield, Kazakhstan, were characterized and treated with flocculants to enhance settling. The wastewater contained a high concentration of total dissolved solids and calcium ion. Scanning electron microscopy and energy dispersive X-ray analyses showed that suspended solids were mainly composed of corrosion products (iron oxides) and silicon ...


    By IWA Publishing

  • Magnetic seeding of non-magnetic adsorbent powders by coagulation using ferric chloride and magnetite

    A magnetic modification of conventional adsorbent powders to remove them rapidly from water is investigated. In this paper we study the possibility of using a non-magnetic adsorbent powder mixed with magnetite and a coagulant such as ferric chloride added after the adsorption to create magnetic flocs that can be magnetically separated (magnetic seeding). A natural zeolite and Na-activated ...


    By IWA Publishing

  • 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 ...

  • Advanced phosphorus removal via coagulation, flocculation and microsieve filtration in tertiary treatment

    The applicability of microsieve technology together with coagulation and flocculation for advanced phosphorus removal was investigated. A pilot unit including a microsieve with 10 μm mesh size was operated continuously with secondary effluent from Ruhleben wastewater treatment plant in Berlin. By applying a pretreatment of 0.07–0.09 mmol/L (as metal) coagulant and 1.5–2 mg/L cationic polymer, ...


    By IWA Publishing

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you