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Performance of a hybrid system of osmotic membrane bioreactor and reverse osmosis

Authors： ZHU Weijun1, WANG Xinhua1,2*, LI Xiufen1,2, REN Yueping1,2

Units： (1.School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122; Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi 214122

KeyWords： microfiltration; forward osmosis; reverse osmosis; salt accumulation; draw solute recovery

ClassificationCode：X703.1

year,volume(issue):pagination： 2018,38(3):104-109

Abstract：

In order to overcome the problems including draw solute recovery and salt accumulation associated with the osmotic membrane bioreactors (OMBR), a new OMBR system assisted with microfiltration (MF) membrane for discharging soluble salts and reverse osmosis (RO) membrane for recovering draw solute was proposed in this study. The results indicated that the salinity in the bioreactor was controlled in the range of 1.95-2.43mS/cm due to the introduction of MF membrane. RO membrane could effectively concentrate the draw solution from 33 mS/cm to 45 mS/cm, and thus achieving the simultaneous recovery of draw solute and water. The MF-OMBR-RO system effectively removed the organic matters, ammonia nitrogen and phosphorus, i.e., the RO permeate could be reused as a high quality water while MF effluent was suitable for urban miscellaneous water. Compared with the commercial forward osmosis (FO) membrane made of cellulose triacetate (CTA) and thin-film composite polyamide (TFC), the aquaporin FO membrane used in this study had a lower initial water flux but a more stable operating flux due to a lower biofouling.

Funds：

国家自然科学基金项目（51578265）

AuthorIntro：

朱卫军（1989-），男，江苏东台人，硕士生，主要从事污水处理与资源化研究，E-mail：m18800583921@163.com *通讯联系人，E-mail：xhwang@jiangnan.edu.cn

Reference：

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