GRUNDFOS CASE STORY New propellers result in greater efficiency TOPIC: Biological treatment LOCATION: Switzerland COMPANY: Abwasserverband Altenrhein NEW PROPELLERS FOR GRUNDFOS AMG MIXERS RESULT IN GREATER EFFICIENCY AND REDUCED COSTS FOR SWISS WASTEWATER TREATMENT FACILITY. Biological treatment at a wastewater treatment plant requires carefully-managed flow velocity. At the Altenrhein wastewater treatment plant in Switzerland, Grundfos replac

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