Energy-Efficient Operation of Wastewater Pumping Systems

Abstract

Speed control of pumps can be used to adapt flow rates to varying operational conditions. In comparison to conventional two-level controllers depending on the water level in the pump sump considerable energy savings can be achieved. In a research project in cooperation with industrial partners, intelligent strategies for the operation of pumps by using speed control have been developed, leading a significant reduction of energy demand. In a reference sewage pumping station on the peninsular Fischland-Darß-Zingst theoretical energy savings of over 20 % were calculated. These savings and the impact of changes in operation of the wastewater conveyance system are currently being demonstrated in a practical test.