wastewater pretreatment Articles

  • Pretreatment Requirements for Membrane Bioreactors

    Adequate pretreatment including fine screening is essential to the stable, long-term operation of membrane bioreactors (MBR) used to treat municipal wastewater. The amount of screenings generated by a screen with 1-2 mm size openings ranges between 10-25 dry mg/L. The cost of fine screening represents less than 3% of the total investment cost for a MBR-based wastewater treatment facility. Case ...

  • Membrane Bioreactors for RO Pretreatment

    ABSTRACTCurrently, treated municipal wastewater is typically discharged to the environment in most parts of the world. It is, however, a potential water resource from which high quality water for reuse can be produced. Reuse applications include both non-potable applications such as irrigation and production of industrial process water, and indirect potable reuse including aquifer recharge. For ...

  • Pretreatment of Municipal Wastewater by Enhanced Chemical Coagulation

    The efficiency of existing municipal wastewater treatment plants has been affected by the increase of incoming organic load caused by the expansions in developing countries. In the present investigation, the effect of Chemically Enhanced Primary Treatment (CEPT) process was studied on the enhancement efficiency of a municipal wastewater treatment plant in ...


    By University of Tehran

  • The effect of wastewater pretreatment on nanofiltration membrane performance

    Membrane fouling is considered a serious obstacle for operation and cost efficiency in wastewater treatment using nanofiltration (NF). However, pretreatment is the most practical way to reduce this prior to NF. In this research, two types of wastewaters were pretreated with different methods prior to NF to examine the effect of pretreatment on membrane fouling in terms of turbidity, chemical ...


    By IWA Publishing

  • On-Site Food Waste Pretreatment

    Guide to equipment and systems for businesses, institutions and venues that manage food waste on-site. Businesses, institutions and venues that generate large volumes of food waste have an increasing number of options to manage this organics stream, starting with tools and knowledge to prevent and reduce what is generated in the first place, followed by donation of excess and prepared ...


    By BioCycle Magazine

  • Ozonation Pretreatment to MIEX® Process

    The MIEX®DOC process is a proven technology for the removal of dissolved organic carbon (DOC) from potable and wastewater sources. Occasionally, waters are found to contain an intractable fraction of organic carbon and in such instances, the performance of the MIEX®DOC technology can be enhanced with ozonation. Ozonation is believed to be effective in partially oxidizing organic material and ...


    By IXOM Watercare

  • Coal cinder filtration as pretreatment with biological processes to treat pharmaceutical wastewater

    This study aims at coupling coal cinder filter with biological process to improve pharmaceutical wastewater quality and reduce the disposal cost. In the coal cinder filter, the removal efficiencies of COD, BOD5, SS and color were 90±2%, 72±2%, 95±2% and 80±2%, respectively. The results attribute to the big specific surface area and strong adsorption ability. Coal cinder filter removes a large ...


    By IWA Publishing

  • Pretreatment system a success for meat processor

    Recovery & removal rates doubled with the AIRE-O2 MICROFLOAT® Problem This Midwest USA red meat processor faced rapidly rising surcharges from the municipal wastewater treatment plant that received the processor’s wastewater. City authorities encouraged the processor to help fund an expansion of the treatment plant’s capacity, an option the processor wanted to avoid. A successful ...

  • Monitoring and Controlling Pretreated Liquid Waste

    Intelligent dataTaker System Handles All Data Collection CAS DataLoggers has just provided an intelligent data logger for a manufacturer facing stringent environmental regulations requiring them to continuously monitor and manage their effluent disposal. Before effluent is discharged from the facility, it had to be heavily ...


    By CAS DATALOGGERS

  • Novel pretreatment enables performance of MBR installed to treat oily wastewater

    Abstract Two new integrated systems processes, gas-energy-mixing (GEM) flotation – electrochemical catalytic oxidation (ECO) – membrane bioreactor (MBR) and ultra-filtration (UF) – ECO – MBR, were tested in industrial-scale pilots of 200L/h to 3000L/h for the treatment and reuse of steel mill cold-rolling emulsion wastewater. The operation parameters and mechanisms of ...

  • Coagulation pretreatment of highly concentrated acrylonitrile wastewater from petrochemical plants

    Acrylonitrile (AN) wastewater is a heavily polluted and a likely hazardous liquid that is generated during the production of AN. Several chemical methods for the pretreatment of AN wastewater are available in laboratory scale. However, the harsh reaction conditions and high operational cost make these methods undesirable. Until now, four-effect evaporation is the only pretreatment method used ...


    By IWA Publishing

  • Case study: pretreatment of challenging pork rinds manufacturing wastewater

    Abstract Problem: Gaytan Foods facilities in City of Industry (Los Angeles, CA) manufacture pickled pork rinds, pickled pig feet and “cheese” puffs. The resulting wastewater is loaded with FOG’s, proteins and salts. Wastewater varies hourly and daily. Drastic changes in amount and type of contaminants occur (two orders of magnitude). During some hours ...

  • Advanced pretreatment enables MBBR treatment of high strength candy manufacturing wastewater

    Abstract Bimbo – Ricolino candy manufacturing plant in Mexico City was discharging wastewater with high amount of fats oil and grease and dissolved sugars. Local regulatory agency requested that suspended solids, oil and grease and dissolved BOD be almost completely removed prior to discharge to municipal plant. The available real estate in Mexico City was very limited. A multistep ...

  • Performance of permeable media rotating reactors used for pretreatment of wastewaters

    The impact of organic loading rate (OLR) on carbonaceous materials and ammonia removal was assessed in bench scale rotating media biofilm reactors treating real wastewater. Media composition influences biofilm structure and therefore performance. Here, plastic mesh, reticulated coarse foam and fine foam media were operated concurrently at OLRs of 15, 35 and 60 g sCOD ...


    By IWA Publishing

  • Treatment of olive mill wastewater by chemical processes: effect of acid cracking pretreatment

    The effect of acid cracking (pH 2.0; T 70 °C) and filtration as a pretreatment step on the chemical treatability of olive mill wastewater (chemical oxygen demand (COD) 150,000 m/L; total organic carbon (TOC) 36,000 mg/L; oil–grease 8,200 mg/L; total phenols 3,800 mg/L) was investigated. FeCl3 coagulation, Ca(OH)2 precipitation, electrocoagulation using stainless steel ...


    By IWA Publishing

  • Dissolved air flotation separation for pretreatment of membrane bioreactor in domestic wastewater treatment

    Due to requiring higher water quality standards over time, new technologies are being employed for wastewater treatment. Dissolved air flotation (DAF) and membrane bioreactor (MBR) technologies are widely employed as new technologies in wastewater treatment. DAF is used due to its excellent separation capability of suspended solids as well as oily material. MBR is used because it may provide a ...


    By IWA Publishing

  • Preparation and Performance of Inorganic Coagulant for Landfill Leachate Pretreatment

    Landfill leachates are often defined as hazardous and heavy polluted wastewaters. It may contain large amount of organic matter, ammonia-nitrogen, heavy metals, chlorinated organics and inorganic salts (Wang et al. 2002). Proper treatment of leachate has therefore been a challenging problem confroting the local authorities. Anaerobic digestion or/and aerobic activated sludge methods are the most ...


    By Springer

  • Pretreatment of furfural industrial wastewater by Fenton, electro-Fenton and Fe(II)-activated peroxydisulfate processes: a comparative study

    The Fenton, electro-Fenton and Fe(II)-activated peroxydisulfate (PDS) processes have been applied for the treatment of actual furfural industrial wastewater in this paper. Through the comparative study of the three processes, a suitable pretreatment technology for actual furfural wastewater treatment was obtained, and the mechanism and dynamics process of this technology is discussed. The ...


    By IWA Publishing

  • Electrochemical treatment of residual ammonia nitrogen in biologically pretreated coking wastewater with three-dimensional electrodes

    The electrochemical oxidation of the residual ammonia nitrogen contained in biologically pretreated coking wastewater using three-dimensional electrode system was studied. The results show the Ti/RuO2/IrO2 anode plates and the coke have good surface characteristics for the purpose of this study. In addition, studies also show that the three-dimensional electrode system should be able to give a ...


    By IWA Publishing

  • Ozone pretreatment of olive mill wastewaters (OMW) and its effect on OMW biochemical methane potential (BMP)

    The possibility of coupling a physicochemical pretreatment (ozonation) with a biological treatment (anaerobic digestion) was investigated for the case of olive mill wastewaters (OMW). Batch ozonation experiments were performed in a glass bubble reactor. The parameters which were tested included the ozone concentration in the inlet gas stream, the reactor temperature and the composition of the ...


    By IWA Publishing

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