Water extraction from mixed liquor of an aerobic bioreactor by forward osmosis: Membrane fouling and biomass characteristics assessment

摘要: Abstract This study investigated membrane fouling and biomass characteristics during water extraction from mixed liquor of an aerobic bioreactor by a submerged forward osmosis (FO) system. As the sludge concentration in reactor increased 0 to 20 g/L, FO but was much less severe than that reference microfiltration membrane. The results also indicate aeration can be used effectively control fouling. By increasing draw solute concentration, as expected, initial flux increased. However, there appears critical above which encountered. A short-term osmotic experiment showed build-up salinity due reverse transport inorganic salts rejection Salinity reduced permeate production, at same time, altered characteristics, leading more soluble microbial products extracellular polymeric substances mass. Additionally, inhibitory effects on high capacity led ammonia ortho-phosphate bioreactor.