Solar Thermal Desalination

Abstract

This study describes the experience received in operating an SM-SBR under different hydraulic retention times for the treatment of synthetic greywater. The pilot-scale SM-SBR with a working volume of VR = 500L is operated with a hydraulic retention times of 36h, 24h and 12h, but a constant volumetric exchange ratio of 0.25.The removal of COD, ammonia, total nitrogen is investigated for the different set-ups. Despite the low COD in greywater, the treatment performance of the reactor is always sufficient to meet reuse guidelines. The biomass concentration increases slowly, although no excess sludge has been taken out (except sampling). Therefore the sludge age is assumed to be >360d.