conventional thickener Articles

  • Anaerobic thermophilic digestion of sewage sludge with a thickened sludge recycle

    The process of anaerobic thermophilic digestion of municipal wastewater sludge with a recycled part of thickened digested sludge, was studied in semi-continuous laboratory digesters. This modified recycling process resulted in increased solids retention time (SRT) with the same hydraulic retention time (HRT) as compared with traditional digestion without recycling. Increased SRT without ...


    By IWA Publishing

  • A pilot study of anaerobic membrane digesters for concurrent thickening and digestion of waste activated sludge (WAS)

    The increased interest in biomass energy provides incentive for the development of efficient and high throughput digesters such as anaerobic membrane bioreactors (AnMBRs) to stabilize waste activated sludge (WAS). This paper presents the results of a pilot and short term filtration study that was conducted to assess the performance of AnMBRs when treating WAS at a 15 day hydraulic retention time ...


    By IWA Publishing

  • Mine backfill

    Mine backfill is defined as the material used to fill the cavities (i.e., stopes) created by underground mining. Backfilling can be a means to dispose of sludge and/ or tailings which may contain hazardous materials and to reduce surface environmental impacts by storing tailings underground. Alternately, backfilling with nonhazardous materials can allow for mining productivity improvements. To ...


    By WesTech Engineering, Inc.

  • Tailings paste disposal – more than water recovery

    The minerals industry has faced increasing pressures in recent years in the management of tailings streams. Environmental, economic and other factors have led many minerals producers to explore the technology of making and using “paste.” With the increasing number of installations worldwide, this technology has proved to not only be industry accepted, but economically advantageous. ...


    By WesTech Engineering, Inc.

  • Lab-scaled digestibility study of wastewater sludge treated by thermal hydrolysis

    ABSTRACT High-solids mesophilic anaerobic digestion (HS-MAD) processes employing thermal hydrolytic pretreatment (THP) have gained much interest in recent years; primarily because they have been shown to produce Class A biosolids in accordance with EPA 503 regulations, but also because they represent an economical approach to the maximization of available anaerobic digester volume. The ...


    By Cambi AS

  • Cambi – the digester `turbo charger`

    ABSTRACT A new patented process design has re-invented thermal hydrolysis in sludge treatment. The first plant from Cambi for hydrolysis of sewage sludge was built in 1995 at the HIAS WwTP, Hamar, Norway for a design capacity of 3500 Mg DS/year. The sludge is directly heated by injection of live steam. During internal recycling of steam a low energy consumption is secured. Predewatering raw ...


    By Cambi AS

  • Direct Dewatering from Oxidation Ditch (Africa)

    Development of proper sanitation or wastewater treatment has been a critical issue in Africa for prevention of almost any types of infectious diseases. Generally, anywhere in the world, the keys for the successful wastewater treatment system is choosing the appropriate solids removal and dewatering technology and achieving the acceptable quality of water for discharge. However, the high ...


    By AMCON Inc.

  • Life Cycle Assessment of an intensive sewage treatment plant in Barcelona (Spain) with focus on energy aspects

    Life Cycle Assessment was used to evaluate environmental impacts associated to a full-scale wastewater treatment plant (WWTP) in Barcelona Metropolitan Area, with a treatment capacity of 2 million population equivalent, focussing on energy aspects and resources consumption. The wastewater line includes conventional pre-treatment, primary settler, activated sludge with nitrogen removal, and ...


    By IWA Publishing

  • Neptune project deliverable D1.3

    Strategies for a sustainable and safe sludge removal Wastewater (WW) treatment and the management of sludge produced are global issues, with growing challenges, that must address the concerns of all of the stakeholders, including the facility administrators and operators, the regulators, the politicians, the scientific community, the wastewater generators, the taxpayers and the general ...


    By IWA Publishing

  • Thermal hydrolysis pre-treatment for high solids anaerobic digestion

    The City and County of San Francisco completed a two-year pilot study of pre-treatment processes to mesophilic anaerobic digestion for improved biosolids stabilization and production of biosolids suitable for unrestricted reuse (class A biosolids). The results of this effort will help in the design of the new Solids Handling Facility (SHF) at the 11 m3/s Southeast Water Pollution Control Plant ...


    By Cambi AS

  • Nakanojo wastewater treatment plant case study

    "We wonder why others don't use Volute." Nakanojo town, nestled along streams in Gunma prefecture, has seven wastewater treatment plants. Among them, Nakanojo wastewater treatment plant is the biggest municipal plant serving 5000 population equivalent. Nakanojo is the municipality where "Volute", originally intended for use in industrial applications, was installed for the ...


    By AMCON Inc.

  • Loch Turret water treatment works

    Actiflo® high rate sand ballasted clarification & multiflo lamella sludge thickening plant The Loch Turret upgrade was the largest drinking water project for Scottish Water in the latest investment period. The scheme was taken over in 2010 and is delivers approx 85 million litres of drinking water per day The Client Scottish Water is the UK's fourth largest ...


  • Acid mine drainage treatment

    Acid mine/rock drainage is a rampant problem in the world today. The above photo depicts acid drainage at an abandoned mine in the Yukon Territory of northwest Canada. This mine shares a similar history to thousands of other mines throughout the world. It was in operation for six short years in the 1950’s, producing gold ore. Its profitability eventually failed and it was abandoned. In the ...


    By WesTech Engineering, Inc.

  • Phosphorus and Heavy Metal Extraction from Wastewater Treatment Plant Sludges Using Microwaves for Generation of Exceptional Quality Biosolids

    ABSTRACTThe objective of this study was to evaluate how much phosphorus and metals in sludge can be released into solution by microwave irradiation when applied to sludge prior to anaerobic digestion, and to determine the effectiveness of subsequent lime precipitation. For thickened sludge, the fraction of phosphorus in the soluble form increased to 23%~28% while for unthickened sludge, to ...

  • Integration of thermal hydrolysis into sludge treatment at cottonvalley WwTW, milton keynes

    The paper is a case study of the construction, commissioning and operation of a new 21,000 tonnes dry solids per annum sludge treatment centre at Anglian Water’s wastewater treatment works at Cottonvalley, Milton Keynes. The construction of the new sludge treatment centre was completed in summer 2008 and is part of Anglian Water’s £95 million AMP5 biosolids programme to provide treatment capacity ...


    By Cambi AS

  • Effect of Microsludge on Anaerobic Digester Performance and Residuals Dewatering at La County’s JWPCP

    MicroSludge™ is a patented chemical and pressure pretreatment process that liquefies waste activated sludge (WAS) to increase both the rate and extent that it is degraded in a conventional mesophilic anaerobic digester (CMAD). The process uses chemical pretreatment to weaken cell membranes and a high-pressure homogenizer, or “celldisrupter”, to provide an enormous and sudden pressure change to ...

  • Municipal Innbygda, Norway case study

    Project Name: Innbygda WWTP Location: Trysil, Norway Type of Plant: Municipal Technology Used: CFAS + DAF Separation (chemical precipitation of P) Operational Since: November 2010 The Challenge the municipality of trysil is home to the largest ski resort in scandanavia. due to ...


    By Biowater Technology

  • Mononov specified for europe’s largest storm overflow

    Through its Spanish distributor, Albosa, Mono has supplied 32 stormscreens and 46 progressing cavity pumps to the UMAC Wastewater Treatment plant, which was designed to handle a maximum flow of 129,600m3 per day. These high performance stormscreens, which offer an alternative to conventional mesh and powered screens for handling storm overflows, have been installed to ensure that no contaminated ...

  • Lagoon and Ditch Sediment Dewatering Utilizing Geotube Preliminary Pilot Demonstration - Case Study

    Project Background Geotubes have proven to be a practical and economical way of dewatering a number of domestic and industrial sludges, and sediments, such as river and lake sediments and contaminates, wastewater lagoon sludge, water treatment plant sludge, packinghouse sludges and wood products sludges. The Michigan Department of Environmental Quality (MDEQ) is interested in evaluating ...

  • Five Years of Successful Operation – A Report on North America’s First New Temperature Phased Anaerobic Digestion System at the Western Lake Superior Sanitary District (WLSSD)

    The Western Lake Superior Sanitary District (WLSSD) is located on the western shore of Lake Superior in Duluth, Minnesota. Five years ago, the WLSSD undertook a major change in its biosolids program, shifting from sludge co-incineration with solid waste to temperature phased anaerobic digestion (TPAD) and land application. The WLSSD wastewater treatment plant treats average flows of 162 million ...

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