wastewater pretreatment screen 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 ...

  • 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 ...

  • 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 ...

  • Flocculation - Flotation pretreatment improves operation of MBR installed to treat snack food manufacturing wastewater

    Abstract Large food manufacturing company has facilities to produce their well known brand name dairy based products in rural Indiana. As is commonly case with dairy wastewater, significant amount of proteins, sugars, oil and some suspended solids are present. Company installed membrane bioreactor (MBR) System to treat such wastewater for possible reuse. The MBR performed poorly ...

  • Fundamentals and Advantages of Screen Filtration

    The “art” of filtration utilizes many methods for separating solid particles from fluids. There is often no right or wrong method. Water quality and customer requirements usually determine the “best” method for each unique situation. Ridged screens, pleated cartridges, string wound cartridges, melt blown cartridges, woven fabrics, non woven fabrics, sintered metals, granular media, frizzy balls ...

  • Rotary Drum Screen - Case Study

    This case study showcases how the Old Atlanta Club Wastewater Treatment Facility has solved its debris problem thanks to Aqualitec's rotary drum screen Drumtec which is ian internally fed rotating drum screen built for heavy pretreatment applications such as draining, mud thickening, and sandy or ...


    By Aqualitec Corp.

  • What is Wastewater?

    What is wastewater? Wastewater, the waste discharge that first comes to mind in any discussion of stream pollution, is the discharge of domestic wastewater, which contains a large amount of organic waste. Industry also contribute substantial amounts of organic waste, some of which comes from vegetable and fruit packing; dairy processing; meat packing; tanning; processing of poultry, ...

  • Screening optimisation for indirect potable reuse

    An automatic backflush pre-filter used for pre-treatment for secondary wastewater re-use was evaluated and optimised at two different mesh sizes over an 18 month period. The filter was initially run with a 500 μm rating mesh size, as recommended by the supplier of the downstream membrane filtration process, and then at 100 μm to investigate any change in water quality produced and associated ...


    By IWA Publishing

  • Food Manufacturing Wastewater Treatment

    Facility Background The new YIBO, Inc. facility in Warrenton MO is the firm's first US production plant. Using state of the art equipment they will manufacture 26 varieties of soy sauce products for the commercial market. Five gallon containers will be distributed nationwide. As a discharge requirement the local POTW requested a wastewater plant for effluent control prior to ...


    By Auquix, LLC

  • Wastewater treatment for a municipality

    Description of the plant At first, wastewater is pre-treated by a combinated sand and fat trap before further treatment is affected by a special screen. The accruing particles are collected in anti-septic plastic bags to avoid any personal contact because of hygienic reasons. Based on the high varying hydraulic amount of wastewater, an aerated mixing and balancing reactor is ...

  • Optimizing Wastewater Treatment

    ' Growing volumes of both industrial and municipal wastewater are being discharged to surface waters but the treatment provided frequently is inadequate to protect the desired uses of the receiving waters. With limited resources in terms of both institutional capacity and finance, governments face difficult choices in optimizing their investments in municipal systems and establishing practical ...


    By The World Bank

  • Wastewater pre-treatment in a confectionery industry

    Description of the plant In a first step, wastewater accruing from the production of marzipane is cleaned by a screen. As flow and load to the plant are highly variable depending on the production process an aerated mixing and balancing reactor has been installed to equalise flow and load before final chemical pre-treatment. After adding of chemicals for precipitation and flocculation ...

  • Electrocoagulation Wastewater Treatment – An Application To Sustainably Reuse Textile Wastewater

    The textile industry is a water consumption intensive industry. Water is utilized for cleaning the raw material, and for the different steps in the textile dyeing process. Due to the effects of water scarcity and stricter environmental regulations, the cost of fresh water utilization has increased worldwide. In addition, the textile industry is faced with pressure by government regulators to move ...

  • Biological wastewater treatment Dalian, China

    To manage the demands set for the plant, a biological treatment with fixed bed was chosen. The water first undergoes pre-treatment by screening and grit/grease removal. Primary sedimentation is done in 4 tanks with lamellar sedimentation.   The first step in the biological treatment consists of BOD, COD and SS ...

  • New trends in oil refinery wastewater reclamation

    Six of the ten largest companies in the world are Oil Companies. This fact would support the argument that there may be no industry more competitive than the Oil Industry.  Within the Oil Companies, the toughest challenges lie within the Refining Divisions. Extreme pressures exist to expand capacities, to produce products which generate market advantages, to improve upon environmental ...

  • Wastewater Treatment for a soft drink processing company

    Description of the plant The wastewater from production and filling of mineral waters and soft drinks is pre-treated mechanically by a screen and buffered in an aerated mixing and balancing reactor. After equalization of flow and load the wastewater is given to the biological reactors where organic substances as sugar and other organic compounds are decreased by biological activity of ...

  • Oil Field Production Wastewater Produce Water Treatment

    Produce Water Treatment Oil Drilling Produce Water Treatment Produce Water Produce water is generated from the oil field production of natural gas and ...


    By Integrated Engineers Inc.

  • Microbiology: The Key to Wastewater treatment case study

    The biological treatment of wastewater relies mainly on a consortium of heterotrophic and autotrophic bacteria. The fecal bacteria that are constantly introduced into the collection system are not the optimal bacteria for degrading the contaminants present in wastewaters. The soil bacteria that are introduced through inflow and infiltration are more effective at degrading the wastes and can ...

  • Introduction to Decentralized Packaged Wastewater Treatment (PWWT) Systems - PDH Article

    Learning Objectives After reading this article, you should understand: Functions and processes of a decentralized PWWT system; Design considerations of a PWWT system. Overview "Clean water will be the oil of the 21st Century." The accuracy and magnitude of this statement is resonating worldwide. ...

  • A new system for nitrogen removal - South African wastewater facility saves energy and meets nutrient removal regulations

    Many small communities across the U.S. and around the globe are struggling to meet more stringent nitrification of ammonia requirements on a tighter budget. When a South African community could not meet its state requirements and struggled with a failing rotor disc system, the town’s officials found an energy saving, affordable solution that met their unique needs and met all their new ...

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