Water Screens Articles

  • Rotomite application serving municipal WWTP, Decatur, Arkansas-case study

    As reported in WaterWorld, Serving the Municipal Water/Wastewater Industry In 1996, the Town of Decaur, Ark., purchased a self-propelled Rotomite 180-P dredging system as part of a new biosolids management program designed to reduce the cost of sludge disposal and to increase solids detention time in-plant. While less than 1,000 people live in Decatur, the town's wastewater treatment plant ...


    By SRS Crisafulli, Inc.

  • A framework for screening sites at risk from contaminants of emerging concern

    Trace levels of a variety of currently unregulated organic chemicals have been detected in treated wastewater effluents and surface waters that receive treated effluents. Many of these chemicals of emerging concern (CECs) originate from pharmaceuticals and personal care products that are used widely and that frequently are transported “down the drain” to a wastewater treatment plant (WWTP). ...


    By John Wiley & Sons, Ltd.

  • Cellulose recovery from municipal wastewater

    During Aquatech 2015 the Dutch technology developer Brightwork set in the spotlight the recovery of cellulose from waste water. The project Cellulose Assisted Dewatering of Sludge (CADoS) aims at separating cellulose fibres from toilet paper from waste water using finescreening technology. After separation the fibres serve as a filter aid for effective dewatering of biological sludge. The ...

  • Control of Microthrix parvicella and sludge bulking by ozone in a full-scale WWTP

    Bulking and rising sludge are common problems in wastewater treatment plants (WWTPs) and are primarily caused by increased growth of filamentous bacteria such as Microthrix parvicella. It has a negative impact on sludge settling properties in activated sludge (AS) process, in addition to being responsible for foam formation. Different methods can be used to control sludge bulking. The aim of ...


    By IWA Publishing

  • Fish consumption as a driver of risk‐management decisions and human health–based water quality criteria

    The use and interpretation of fish consumption surveys and interviews, the application of fish consumption rates for sediment evaluation and cleanup, and the development of human health water quality criteria (HH WQC) are complex and interrelated issues. The present article focuses on these issues using examples from the United States, although the issues may be relevant for other countries. ...


    By John Wiley & Sons, Ltd.

  • Impact of fine mesh sieve primary treatment on nitrogen removal in moving bed biofilm reactors

    The purpose of this project was to investigate the effect of selective particle removal during primary treatment on nitrogen removal in moving bed biofilm reactors (MBBRs). Two small MBBR pilot plants were operated in parallel, where one train treated 2 mm screened municipal wastewater and the other train treated wastewater that had passed through a Salsnes Filter SF1000 rotating belt sieve ...


    By IWA Publishing

  • ROMAG storm water screen system for the CSO works La Maladière in Neuenburg

    With the RSW-K high-capacity storm water screen and a emergency shut-off valve, the volume of the upstream sewerage system is optimally utilized and the receiving body ideally protected against contamination. The storm water screen removes visible solids from the sewage water before the water is discharged into the receiving body. At the La Maladière surplusing works, the ROMAG RSW-K ...


    By ROMAG aquacare ag

  • Impact of activated sludge process configuration on removal of micropollutants and estrogenicity

    The efficacy of three different wastewater treatment configurations, conventional activated sludge (CAS), nitrifying activated sludge (NAS) and biological nutrient removal (BNR) for removal of selected micropollutants from authentic wastewater was investigated. The processes were also characterized based on their proficiency to reduce the estrogenic activity of the influent wastewater using the ...


    By IWA Publishing

  • Virulence and plasmidic resistance determinants of Escherichia coli isolated from municipal and hospital wastewater treatment plants

    Escherichia coli is simultaneously an indicator of water contamination and a human pathogen. This study aimed to characterize the virulence and resistance of E. coli from municipal and hospital wastewater treatment plants (WWTPs) in central Portugal. From a total of 193 isolates showing reduced susceptibility to cefotaxime and/or nalidixic acid, 20 E. coli ...


    By IWA Publishing

  • Particle removal in a novel sequential mechanical filter system loaded with blackwater

    A novel sequential mechanical filter system was developed as an alternative primary treatment method for onsite wastewater treatment. The filter combines traditional screening with a novel type of counter-flow filter using wood-shavings as a biodegradable filter matrix. This study tested the system in a batch loading regime simulating high frequency toilet flushing using blackwater from a ...


    By IWA Publishing

  • Linking the chemical speciation of Ce to its bioavailability in water for a freshwater alga

    Over the past decade, researchers have begun to use metals of the lanthanide family for numerous applications, including liquid crystal display (LCD) screens, optical fibers and laser technology. Unfortunately, little is presently known about their bioavailability or the mechanisms by which they might cause toxicity. This paper focuses on cerium, which is one of the most widely used ...


    By John Wiley & Sons, Ltd.

  • Turning metal wires from pulp bales into profit with TANA Shark

    Metal wires from paper pulp bales are high in value but very hard to shred and clean for selling purposes. Usually the metal wires are stuck with plastics and some remains of the pulping process. This particular type of waste is almost impossible to separate, says a landfill operator in France. Normally the only possibility to handle this type of waste is to dump it at a landfill. This is due ...


    By Tana Oy

  • Case study - Meat processing

    The client Our client produces and sells a variety of beef products, including fresh, frozen, canned, both vacuum packed or packaged in a protective atmosphere. They also offer a completerange of cuts and processed hamburgers, ready pre-cooked meals, veal cutlets, grilled and roasted products. The company is the market leader in the frozen hamburger sector, with an annual production ...


    By IDRAFLOT

  • Sensitivity analysis of the CLARA Simplified Planning Tool using the Morris screening method

    The Morris screening sensitivity analysis (SA) has been used to assess how the uncertainty of input parameters influences the output of the CLARA Simplified Planning Tool (CLARA-SPT). To assess the sensitivity of the tool, four hypothetical waste collection and treatment alternatives, which planned to serve 10,000 people, have been proposed and analysed. These alternatives are (A1) dry ...


    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 Plant Optimisation PLANT C - Case Study

    Site Details:: PLANT C Wastewater Treatment Works, Co. Cavan, Ireland. Operator details: Undisclosed Description of Wastewater Treatment Facility: PLANT C is a Municipal Wastewater Treatment Facility which uses a trickling filter and RBC for treatment of the wastewater and has tertiary treatment using a reed bed before final discharge. Plant consists of an ...


  • Drum mixer compounds wide range of particles... and a modified paddle mixer solves a tricky problem

    In 1985 Mortex Manufacturing Co., Inc., bought a new rotary drum mixer in anticipation of expanding its line of chemical additives that are used to make decorative, nonskid coatings for concrete around swimming pools and on patios. The additives are mixed with white cement and white ...

  • Heard County Water Authority - Holistic approach - Case Study

    Location: Franklin, Georgia Owner: Heard County Water Authority Engineer: Hayes, James, & Associates Contractor: P.F. Moon Outdated Equipment The Heard County Water Authority serves over 380 connections in and around Franklin, Georgia. With a growing population, Heard County was beginning to  exceed the capacity of the existing wastewater treatment ...


    By WesTech Engineering, Inc.

  • High output of quality flavors demands efficient grinding

    Vanilla beans from Madagascar, cinnamon bark from Sri Lanka, ginger roots from Nigeria and many other natural flavors you enjoy have likely come from Givaudan Flavors Corp. which extracts flavor from natural products, concentrates it, packages and markets it to food and beverage manufacturers. Givaudan processes natural ingredients on a mass scale, placing high demands on its size reduction ...

  • Start up of Indonesian Cinnamon Plant employs screen classifying cutter, rotary mixer

    Starting up a new process plant can be a tricky business for any company, but when it is the first plant the company has ever built and the location is halfway around the world from equipment suppliers, the project can be daunting. So it was with ForesTrade, Inc., when it set about building Indonesia's first state-of-the-art organic cinnamon-processing plant and an associated essential oils plant ...

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