Scum Removal Articles

  • Gaafour & Ghardimaou WWTP Project - Tunes - Case Study

    Customer: Geiger International GmbH& Co.KG Project Name: Gaafour & Ghardimaou WWTP Manufacturing year: 2001 Scope of supply 32 pcs. in Various dimensions Penstocks and Stoplogs, completely AISI 304 ...


    By ASTIM A.S.

  • European Foods Project - Romania - Case Study

    Customer: BIOTHANE systems International BV Project Name: European Foods Manufacturing year: 2002 Scope of supply 1 pcs. Polymer Preparation Unit Automatic, 1m3 capacity 1 pcs. Ø 9 m. Picket ...


    By ASTIM A.S.

  • OTV France SUD Project (France) - Case Study

    Customer: OTV France Sud (France) Project Name: ...... Manufacturing year: 2009 Scope of supply 4 pcs. Cable Operated ...


    By ASTIM A.S.

  • TULA Project WWTP (Russia) - Case Study

    Customer: Hager & Elsässer (Germany) Project Name: Tula WWTP (Russia) Manufacturing year: 2008 Scope of supply 1 ...


    By ASTIM A.S.

  • Kaunas WWTP Rehabilitation Project (Litauen) - Case Study

    Customer: WTE (Germany) Project Name: Kaunas WWTP Rehabilitation Project (Litauen) Manufacturing year: 2007 Scope of supply 1 pcs. Ø 40 m Half Type PST Scraper Bridges (with 4Control Panel, Channel Cleaning ...


    By ASTIM A.S.

  • SKIKDA WWTP Project - Case Study

    Customer: OTV France Sud (France) Project Name: SKIKDA WWTP Manufacturing year: 2008 Scope of supply 1 pcs. Ø 10 m Degazeur Tank Central Driven Surface Scrapers (with Weirs, Baffles and Scum Hoppers); Dry ...


    By ASTIM A.S.

  • Rectangular vs. Circular Clarifiers: Which is better?

    Both rectangular and circular configurations have been commonly used in clarifier basins. The relative merits of the two have been discussed at length for decades. Historically, the selection of rectangular versus circular clarifiers has been based on past experience and the preference of the design engineer or design company. Initial wastewater treatment plant designs in the United States were ...


    By Brentwood Industries, Inc.

  • Algae Problems

    Almost everywhere where water is being stored, algae problems may occur. When water is stagnant, has a high temperature or a high concentration of Nitrates and Phosphates, an algae bloom might occur, which can cause several problems. Blue-green algae growth can cause a foul odour to the water, a layer of scum on the surface and even pose a health risk. Green algae may colour the water green, look ...


    By LG Sonic

  • Enhanced phosphorus removal in the DAF process by flotation scum recycling for advanced treatment of municipal wastewater

    To remove phosphorus (P) from municipal wastewater, various types of advanced treatment processes are being actively applied. However, there is commonly a space limit in municipal wastewater treatment plants (MWTPs). For that reason, the dissolved air flotation (DAF), which is well known for small space and flexible application process, is preferred as an additive process to enhance the removal ...


    By IWA Publishing

  • Amnite k100 & k150 case study

    This trial was carried out in the waste water treatment plant of a paper mill with severe bulking problems. Large amounts of suspended solids regularly overflowed from the secondary clarifier and the aerated lagoon had a scum layer of about 20cm on top. This scum layer contained a lot of filamentous bacteria. The effluent from the clarifier flowed into a river resulting in visual floating clumps ...


    By Cleveland Biotech Ltd.

  • Occurrence of Microthrix parvicella in sequencing batch reactors

    Sequencing batch reactors (SBRs) are known for high process stability and usually have a good sludge volume index (SVI). Nevertheless, in many SBRs in Germany for municipal wastewater treatment, scum and foam problems can occur, and SVI can be larger than 200 mL/g. The microscopic investigations of the activated sludge from plants with nitrogen and phosphorus removal have shown that Microthrix ...


    By IWA Publishing

  • Steam Wash Systems: Simplifying Soap Scum Removal

    Bathroom maintenance is one of the most demanding cleaning applications in most hospitality settings and restrooms. The floors, walls, show stalls, bathtubs, and sliding doors can quickly develop rust, hard water, and soap scum with daily use. This is primarily due to the high moisture levels, poor lighting, and minimal air circulation in these areas. Sometimes, the use of best chemicals or hours ...


    By Daimer Industries Inc.

  • Blue green algae in Harbour case study

    In May 2007 LG Sound proposed treatment for a harbour in the Netherlands, called Tholen. The harbour, which measured approximately 1 Km in length, suffered badly from blue-green algae growth. Blue-green algae produce toxins, which can be harmful form humans and animals and lead to major fish die offs. The toxin concentration and smell in the harbour from Tholen was so bad that recreational use ...


    By LG Sonic

  • Wireless control for valve actuators - Case Study

    At first glance, wireless network control and its application to valve actuation might not impress many plant engineers as being an earthshaking technological development. Yet, because of the tremendous cost savings that can result, the benefits associated with its adoption can be dramatic – an evolutionary achievement that is likely to change the process plant landscape for decades to ...


    By Rotork plc

  • Viikinmäki WWTP

    Helsinki city municipal wastewater treatment plant DEWACO delivered a complete sludge removal system comprising of: 14 nos. Chain & Flight type sludge and scum collectors (each system 65m x 8,2m) Project completion: 2008 Customer: Helsinki City Background info of this unique plant design can be found ...


    By Dewaco Ltd

  • WWTP Quesna, Mubarak Industrial City

    During Phase I of the project, DEWACO delivered a complete sludge dewatering solution for comprising of: 3 nos. Belt Filter presses type NPD31L (3.1m belt width) and all other peripheral equipment including polymer preparation and post dilution, pups, conveyors, PLC etc. for dewatering and 4 sets of chain and flight type sludge and scum collectors ( dimensions: 36m L x 5,5m W x 2,35m ...


    By Dewaco Ltd

  • Putrajaya WWTP, Phase I & II, Kuala Lumpur CSS

    Design capacity of 300 000 P.E (phase 1) and 600 000 P.E. (phase II) DEWACO Supplied full package for the sludge removal system of: 4 nos. Chain & Flight type sludge and scum collectors and 4 nos. scum pipes (each 62m long and 9m width) for Phase I Project completion: 1998 10 nos. Chain & Flight type sludge and scum collectors and 10 nos. scum ...


    By Dewaco Ltd

  • Mumbai Refinery Mahaul (BPCL) API settlers

    API Settlers DEWACO deployed a complete sludge removal system consisting of: 16 nos. Chain and Flight type sludge and scum collectors and 28 nos. Scum pipes . 3 nos. 21 x 2,5 3 nos. 21 x 2,5 2 nos. 18 x 4,6 3 nos. 18 x 6,1 5 nos. 18 x 6,1 Project completion: 2008 ...


    By Dewaco Ltd

  • MOL oil & gas refinery

    MOL Hungarian Oil & Gas Plc is the national Oil & Gas company for Hungary, it forms part of the large MOL Group and is by far the largest, in terms of turnover for the Hungarian sector as a whole. The project is a first for the region. API Settlers DEWACO supplied a fully functional sludge removal system comprising of: 6 nos. Chain & Flight type sludge and scum ...


    By Dewaco Ltd

  • Amnite k100/k150 case study

    This trial was carried out in the waste water treatment plant of a paper mill with severe bulking problems. Large amounts of suspended solids regularly overflowed from the secondary clarifier and the aerated lagoon had a scum layer of about 20cm on top. This scum layer contained a lot of filamentous bacteria. The effluent from the clarifier flowed into a river resulting in visual floating clumps ...


    By Cleveland Biotech Ltd.

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