Treatment of Chemical Wastewater by Coupled Membrane-Aerated Biofilm Reactor (MABR) System

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Abstract

The treatment of high-concentration chemical organic wastewater by a coupled membrane-aerated biofilm reactor(MABR) system, including ferric-carbon micro-electrolysis and Fenton reaction applied as biological polishing steps, membrane-aerated biofilm reactor(MABR) process and ozonization as post-treatment was studied experimentally. The influence of operational conditions on COD reduction and BOD₅/COD (B/C) ratio was explored. The results showed that an increase of B/C ratio from 0.05 to 0.12 was achieved when micro-electrolysis was employed at pH of 4 for 1.5 h. The optimized conditions of Fenton reaction were n(H₂O₂)∶n(Fe²⁺) of 9 and pH of 3. Finally, coupling MABR system with ozonization, COD concentration of the effluent quality stayed below 500 mg/L and reached the standard of introduction to municipal sewage treatment plants.

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	Articles by authors
	Zhang Huimin
	Li Peng
	Sun Linquan
	Tian Hailong
	Li Baoan

Keywords： MABR； chemical organic wastewater； ferric-carbon micro-electrolysis； Fenton reaction； ozonization

Received 2015-04-23;

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Zhang Huimin, Li Peng, Sun Linquan, Tian Hailong, Li Baoan.Treatment of Chemical Wastewater by Coupled Membrane-Aerated Biofilm Reactor (MABR) System[J] Chemcial Industry and Engineering, 2017,V34(3): 58-64

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