14 COMPARISON AND UPGRADING OF WASTEWATER TREATMENT PLANTS FOR WASTEWATER RECLAMATION AND REUSE BY MEANS OF MEMBRANE BIOREACTOR (MBR) TECHNOLOGY

摘要

Domestic wastewater is usually treated by conventional activated sludge processes (CASPs), which involve the natural biodegradation of pollutants by heterotrophic bacteria (i.e., activated sludge) in aerated bioreactors [1]. Activated sludge could be separated by gravitational settling. The treatment efficiency is usually limited by the difficulties in separating suspended solids (SS) [2].