2007•China Water & WastewaterRequires access

Effect of Aeration Mode on Operational Performance of Submerged Membrane Bioreactor

Chao Sun

Abstract

The two submerged membrane bioreactors with same structure were used to treat domestic wastewater,and the influence of different aeration modes on the operational efficiency was investigated.The average removal efficiencies of COD,NH3-N and TN by MBRs operated with continuous intense aeration mode and intermittent intense aeration mode don't have a significant difference.Nevertheless,the latter can reduce the releasing of extracellular polymeric substances(EPS) and soluble microbial products(SMP) in mixed liquor,which mitigates the membrane fouling.Moreover,the effective energy consumption is 60% of the former.

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Key concepts: Aeration, Membrane bioreactor, Extracellular polymeric substance, Membrane fouling, Bioreactor, Wastewater, Pulp and paper industry, Chemistry