Biological Nutrient Removal and EPS Performance in Aerobic-MBR and SBR-MBR Systems
.Membrane bioreactor (MBR) is considered to be a promising technology for combine biological with filtration and many advantages over conventional activated sludge (CAS) processes. In this study, the submerged membrane bioreactor which was explored by our research group and JDL Environmental Protection Ltd. at condition of aerobic-MBR and SBR-MBR were investigated. Hydraulic characteristics of MBR by the tracer experiments showed the total dead space (Vd, %) in the MBR was 3.2%. Compared with aerobic-MBR situation, the SBR-MBR exhibited better performance of average NH4+-N, total nitrogen, and phosphorus removal efficiency 90%, 86%, 57% respectively. The content of protein was correlated to sludge activity and organic matter. The initial membrane fouling was caused by layer pollution and subsequently the extra-cellular polymeric substances (EPS) contributed.
Jin Yun and Dehuai Zeng
X. N. Feng et al., "Biological Nutrient Removal and EPS Performance in Aerobic-MBR and SBR-MBR Systems", Advanced Materials Research, Vol. 699, pp. 291-297, 2013