Effect of Suspended Carriers on Extracellular Polymeric Substances in MBR

Abstract:

Suspended carriers were added into a submerged membrane bioreactor (SMBR) using polypropylene non-woven fabric (PP NWF) as membrane model to treat synthetic wastewater. The changes of EPS_SEPS_B and EPS in activated sludge mixing liquid of MBR and in sludge on membrane model surface were researched at different aeration rate. The results showed that adding suspended carriers in MBR can increase the concentration of EPS_S and EPS_B in activated sludge mixing liquid, but the effect on EPS_S and EPS_B in the sludge on membrane model surface is related to aeration rate. Adding suspended carriers can increase the concentration of EPS_S and EPS_B in the sludge on membrane model surface at 0.10m³/h of aeration rate; the concentration of EPS_S and EPS_B in the sludge with suspended carriers is reduced when aeration rate is increased to 0.25m³/h. The study on the effect of aeration rate on EPS in sludge mixing liquid of MBR and in sludge on membrane model surface showed that an optimized aeration rate exists if suspended carriers are added to control MBR membrane fouling. At the optimized aeration rate, membrane fouling can be mitigated and controled effectively.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 1939-1943
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.1939
• Online since: June 2014
• Authors: Chun Hua Zhang*, Xiao Xia Ou, Feng Jie Zhang
• Keywords: Aeration Rate, EPS, Suspended Carrier

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