IED Industrieanlagen und Ingeneering GmbH

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IED Industrieanlagen und Engineering GmbH in Frechen, Germany

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Project: ARA Oftringen

Project  at ERA Oftringen / 8 scrapers for final setting basins and a skimming channel in a basin of 44 x 8 m size

Supply of 8 DEWA® plastic chain scraper systems and a V-trough skim channel (hand-lever operated) to ARA Oftringen, Switzerland.

In September 2017, we supply the first two DEWA® plastic chain scrapers with our V-trough skim channel (hand-lever operated) to ARA in Oftringen (Switzerland). In the next two years all old bridge scrapers will be replaced by our DEWA® belt scrapers with skim gutters. Thereby, the discontinuous sludge removal will be replaced by continuous sludge scraping into the final setting basin of a 44 x 8 m size.

We would like to thank our Swiss partner and our common customers for its trust in us and are looking forward to a successful cooperation in the project implementation.

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Project sewage treatment plant in Berlin-Wassmannsdorf: 12 chain scrapers in a preliminary setting basin of a 50 x 10 m size.


Supply and assembly of DEWA® plastic chain scraper systems including built-in fittings in the preliminary setting basin at the sewage treatment plant in Berlin-Wassmannsdorf

In January 2015 we successfully commissioned the first two of a total of 12 DEWA® plastic chain scrapers at the sewage treatment plant in Berlin-Wassmannsdorf. In September 2017, the last two systems will be commissioned. Then all the old systems will be replaced by DEWA® belt scrapers. The low-wear DEWA® systems remove bottom sludge and top scum in the preliminary setting basin and in the central basin of a 50 x 10 m size.

We would like to thank the Berlin Public Waterworks for their trust in us and a fruitful cooperation during the project execution.

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Project sewage treatment plant in Mannheim: final treatment with activated carbon powder


Supply of 10 DEWA® plastic chain scrapers for bottom sludge scraping including in-feed units and skim gutters for the sedimentation basin for powdered activated carbon (size 77 x 6 m) at the sewage treatment plant of Mannheim.

The first plastic chain scrapers installed in 2009 were followed by 8 other scrapers commissioned in the summer of 2016. Today 10 DEWA® bottom-sludge scrapers remove the activated carbon powder sludge from the sedimentation tanks to the sludge hoppers of the recirculation pumps and ensure a perfect elimination of traces at the wastewater treatment plant in Mannheim.

We would like to thank our client and the end customer for their trust in us and a  fruitful cooperation during the project execution.

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