acidic wastewater effluent Articles

  • Performic acid for advanced wastewater disinfection

    The disinfection efficiency of performic acid (PFA) against various microbial contaminants has been studied in municipal secondary effluent. The study demonstrated that PFA provides rapid, efficient and safe disinfection, degrading both bacteria and viruses even at low doses. The resistance order starting from the most resistant microorganism is as follows: MS2-coliphages > DNA-coliphages ...


    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

  • The dissolution characteristics of calcium sulfide and utilization as a precipitation agent in acidic wastewater effluent treatment

    The dissolution characteristics of CaS in the presence of CO2 has been investigated by monitoring sulfide speciation, solution conductivity and pH during dissolution. The sulfide speciation associated with CaS dissolution was utilized for metal precipitation from acidic wastewater effluents. The mechanism involved in the dissolution process was observed to be pH-dependent, characterized by ...


    By IWA Publishing

  • System for bioremediation of effluents

    Executive Summary The remediation process of commercial, municipal, industrial and agricultural wastewaters has employed combinations of sulfuric acid, caustic, petroleum based solvents and synthetic emulsifiers, which are either toxic or generally non-biodegradable. An alternate method using naturally occurring microorganisms has been utilized for many years to facilitate the remediation ...


    By NCH Corporation

  • Factors Affecting Cyanide Generation in Chlorinated Wastewater Effluent Matrix

    ABSTRACTFalse positives for cyanide analysis in wastewaters have been reported. We examined the effects of storage time at high pH and of pH adjustments on the cyanide levels. Cyanide levels changed within the holding time allowed by Standard Methods. We also studied the difference in cyanide levels using two disinfection conditions -- breakpoint chlorination and chloramination. Glycine was used ...

  • Removal characteristics of retinoic acids and 4-oxo-retinoic acids in wastewater by activated sludge treatment

    Retinoic acid (RA) receptor (RAR) agonists are potential teratogens to various vertebrates. Their contamination has been detected in municipal wastewater in different countries. This study involved field investigations and laboratory batch treatment experiments to elucidate the removal characteristics by activated sludge treatment of RAs (all-trans RA and 13-cis RA) and ...


    By IWA Publishing

  • What is the textile effluent treatment?

    Water is the most wonderful gift of nature. Water is most useful and abundant compound in the earth. Water is not only essential for human lives, animals, plant lives but also has a unique importance in industries. The textile industry uses water very intensively. Water is the main principle medium in the textile industry to apply dyes and various finishes. Thus the ...

  • Water matrix effect on UV photodegradation of perfluorooctanoic acid

    The widespread detection of perfluorinated compounds (PFCs) in the water environment has been a concern for the last several years, while effluents from wastewater treatment facilities are the major sources of these compounds. Even advanced oxidation technologies (AOTs) are not useful for mineralization of the compounds due to their very high stability. Photochemical techniques using particularly ...


    By IWA Publishing

  • Removal of perfluorinated compounds in wastewater treatment plant effluents by electrochemical oxidation

    The presence of perfluorinated compounds (PFCs) in the effluents of a wastewater treatment plant (WWTP) in Beijing was investigated in the current study. Perfluorooctanoate acid and perfluorooctane sulfonate were the predominant PFCs in wastewater, accounting for 19–27% and 18–31%, respectively. The concentrations of PFCs with long chains were much lower than those ...


    By IWA Publishing

  • Characteristic of wastewater and their analysis

    Wastewater containing chromium and other heavy metals, is highly toxic effluents which require high-quality and efficient purification. Such effluents formed during electroplating, other types of chemical, electrochemical surface treatment of metal products such as chromium-plating, nickel-plating, copper-plating, zinc-plating, cadmium-plating and also during some technological ...


    By GlobeCore GmbH

  • Adi-hybrid pilot study for treating acrylic acid and formaldehyde wastewater

     ABSTRACT This paper summarizes the results of an anaerobic pilot study conducted on-site at the Eastman Chemical Company plant located in Sokolov, Czech Republic. One 800 L ADI-Hybrid pilot reactor was operated for 15 months from February 19, 2003 to May 23, 2004, treating selected petrochemical wastewater generated from the two Acrylic Monomers Plants (acrylic acid plants) on site. ...

  • Peracetic Acid – is it an Environmentally Friendly Alternative to Chlorine?

     ABSTRACT Concerns with chlorine disinfection have led to investigation of alternative disinfectants for use in the environmental arena. Are there environmentally safe alternatives to chlorine? Is peracetic acid one among these? Peracetic acid is one among several chemicals that have been touted as a replacement in recent years. Peracetic acid is very effective in killing bacteria, ...

  • Disinfection of an advanced primary effluent using peracetic acid or ultraviolet radiation for its reuse in public services

    The disinfection of a continuous flow of an effluent from an advanced primary treatment (coagulation-flocculation-sedimentation) with or without posterior filtration, using either peracetic acid (PAA) or ultraviolet (UV) radiation was studied. We aimed to obtain bacteriological quality to comply with the microbiological standard established in the Mexican regulations for treated wastewater reuse ...


    By IWA Publishing

  • Titanium Dioxide Wastewater

    A large amount of waste acid is produced in the production of titanium dioxide, a large amount of high-salt wastewater is generated in the post-treatment process, and some titanium dioxide is still lost after the CN filter. On the one hand, the titanium white industry suffers from increasingly strict Environmental constraints, on the other hand, waste acid, water, and titanium dioxide resources ...


    By Jiangsu Jiuwu Hi-tech Co

  • Bioplastic production using wood mill effluents as feedstock

    Fibreboard production is one of the most important industrial activities in Galicia (Spain). Great amounts of wastewater are generated, with properties depending on the type of wood, treatment process, final product and water reusing, among others. These effluents are characterized by a high chemical oxygen demand, low pH and nutrients limitation. Although anaerobic digestion is one of the most ...


    By IWA Publishing

  • Odorous compounds treatment of winery and distillery effluents during natural evaporation in ponds

    ABSTRACTDuring treatment of winery and distillery wastewater by natural evaporation in ponds, formation of malodorous compounds induces harmful olfactory effects. In this work, we studied the origin of malodorous compounds and methods to prevent and treat odours. The formation of volatile fatty acids (VFA) from pure substrates (glycerol, lactic and tartaric acids, ethanol) and complex media ...


    By IWA Publishing

  • Titanium Dioxide Wastewater

    Titanium Dioxide Wastewater A large amount of waste acid is produced in the production of titanium dioxide, a large amount of high-salt wastewater is generated in the post-treatment process, and some titanium dioxide is still lost after the CN filter. On the one hand, the titanium white industry suffers from increasingly strict Environmental constraints, on the other hand, waste acid, water, and ...


    By Jiangsu Jiuwu Hi-tech Co

  • Catalytic wet oxidation of ferulic acid

    Catalytic Wet Oxidation (CWO) of aqueous ferulic acid (a lignin model compound) was carried out under mild conditions (100?150?C, ~300 kPa PO2). Significant removal of ferulic acid (in terms of Total Organic Carbon (TOC)) (81% at 100?C and 95% at 150?C after 2 hr) was obtained using a CuNiCe/Al2O3 catalyst. A considerable portion of this TOC was removed during the heat-up period prior to oxygen ...


    By Inderscience Publishers

  • Valuable product production from wood mill effluents

    Fibreboard production is one of the most important industrial activities in Galicia (Spain). Great amounts of wastewater are generated, with properties depending on the type of wood, treatment process, final product and water reusing, among others. These effluents are characterized by a high chemical oxygen demand (COD), low pH and nutrients limitation. Aerobic and anaerobic processes have been ...


    By IWA Publishing

  • Contribution of different effluent organic matter fractions to membrane fouling in ultrafiltration of treated domestic wastewater

    In the present work, effluent organic matter (EfOM) in treated domestic wastewater was separated into hydrophobic neutrals, colloids, hydrophobic acids, transphilic acids and neutrals and hydrophilic compounds. Their contribution to dissolved organic carbon (DOC) was identified. Further characterization was conducted with respect to molecular size and hydrophobicity. Each isolated fraction was ...


    By IWA Publishing

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