Anaerobic membrane bioreactor for high-strength wastewater treatment: batch and continuous operation comparison

Journal of Water Reuse and Desalination

Hong, Y.¹  Wu, P.²  Chang, S.³  Zytner, R. G.³  Hufnagel, D.³ 

[1] GE Water and Process Technologies, 3239 Dundas Street West, Oakville, ON L6M 4B2, Canada;Ontario Ministry of Agriculture and Food, and Ministry of Rural Affairs, 1 Stone Rd West, Guelph, ON N1G 4Y2, Canada;School of Engineering, University of Guelph, Guelph, ON N1G 2W1, Canada

关键词: anaerobic membrane bioreactor (AnMBR);    AnMBR start-up;    batch operation;    continuous operation;    critical flux;   

DOI  :  10.2166/wrd.2015.058

学科分类：工程和技术（综合）

来源: IWA Publishing

【 摘 要 】

The anaerobic membrane bioreactor (AnMBR) is a recent development in high-rate anaerobic bioreactors. This study assessed the treatment of high-strength wastewater by an AnMBR using batch and continuous feeding operation. The results showed that the AnMBR could establish a biomass concentration of 6–8 g/L in approximately 20 days due to retention of micro-organisms by the membrane, resulting in 86% chemical oxygen demand (COD) removal efficiency in the treatment of high-strength brewery wastewater. Batch operation was proven to be effective for an organic loading rate (OLR) up to 2 gCOD/L/day and was beneficial to the membrane filtration. However, the treatment capacity of the AnMBR with batch feeding was limited by the high instantaneous OLR during the feeding period. Compared to batch operation, continuous feeding can achieve improved stability and better effluent quality, but prolonged continuous permeation may make the membrane more susceptible to fouling. Although a critical flux of 22 L/m2/h was determined for the membrane filtration in the AnMBR tested, a decrease in the membrane permeability was still observed in the long-term filtration at a flux of approximately 10 L/m2/h.

【 授权许可】

CC BY-NC-ND