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igus®-energy chain "basic flizz®" in the ZWAV sewage treatment plant in Plauen
The Zweckverband Wasser und Abwasser Vogtland (ZWAV) has replaced the motorised cable reel, which supplied a scraper with energy, with a "basic flizz®" system from igus® at the Plauen sewage treatment plant. Since then, the energy and signalling supply to the primary clarifier has been running smoothly. The new system - a ready-to-install combination of energy chain and stainless steel housing - was specially developed for the requirements profile of sewage treatment plant operation.
"There were no problems. With the motorised cable reel, we would certainly have had at least one more accident"
Andreas Schubert, Division Manager of ZWAV Plauen on his experience with the igus®-energy chain system
The classic solution for a scraper in a sewage treatment plant is a motorised cable reel that travels on the scraper bridge and rolls the cable up and down synchronously with the position of the scraper. However, such a system can cause problems, as those responsible at the Plauen wastewater treatment plant realised. Andreas Schubert, wastewater foreman and responsible for a foreman area of the plant operator ZWAV (Zweckverband Wasser und Abwasser Vogtland): "As the cable rests on the top of the tank, it can twist and freeze in frosty conditions. It is then run over by the scraper and has to be replaced."
This also happened several times in Plauen, where the wastewater from around 70,000 residents and the local industry is treated, and led to high repair costs because the cables are adapted to the adverse environmental conditions and are correspondingly expensive. The idea for the energy chain ultimately came from an electrician who had already worked with the systems in a completely different field of application.
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