Effect of driving force on the performance of anaerobic osmotic membrane bioreactors: New insight into enhancing water flux of FO membrane via controlling driving force in a two-stage pattern 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Journal of Membrane Science
年/卷/期
2019 / 569 /
页码
41-47
ISSN号
0376-7388
作者单位
Jiangnan Univ, Sch Environm & Civil Engn, Jiangsu Key Lab Anaerob Biotechnol, Wuxi 214122, Peoples R China;Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China;Jiangnan Univ, Sch Environm & Civil Engn, Jiangsu Key Lab Anaerob Biotechnol, Wuxi 214122, Peoples R China;Jiangnan Univ, Sch Environm & Civil Engn, Jiangsu Key Lab Anaerob Biotechnol, Wuxi 214122, Peoples R China;Univ Sydney, Sch Chem & Biomol Engn, Sydney, NSW 2006, Australia;Jiangnan Univ, Sch Environm & Civil Engn, Jiangsu Key Lab Anaerob Biotechnol, Wuxi 214122, Peoples R China;
作者
Wang, Xinhua;Meng, Fangang;Li, Xiufen;Ren, Yueping;She, Qianhong;Wang, Hailong;
摘要
Anaerobic osmotic membrane bioreactor (AnOMBR) has shown great promise for wastewater treatment and energy recovery. One of the major obstacles limiting the performance of the AnOMBR is the low water flux of forward osmosis (FO) membrane. Here, impacts of draw solution (DS) concentration on the performance of the AnOMBR were investigated for enhancing the water flux of FO membrane via controlling the driving force. The results indicated that the flux variations of FO membrane in the AnOMBR included two stages of a rapid and a mild flux declines at all DS concentration conditions. In addition, the FO membrane fouling correlated well with the flux variations for all DS concentration levels, i.e., a severe fouling in Stage 1 and a slight fouling in Stage 2. When the driving force or DS concentration exceeded a critical value, a worse FO membrane performance especially a severer flux decline in Stage 1 was observed. It could be attributed to an aggravated membrane fouling in Stage 1 owing to an increased initial flux with the rise of the driving force, implying that a critical initial flux exists in the AnOMBR except for a critical driving force. Inspired by the critical initial flux and the significant role of the membrane fouling in Stage 1, this study provides a novel method to enhance flux performance of FO membrane via controlling the driving force in a two-stage pattern. It utilizes a low driving force in Sage 1 to form a thin and loose fouling layer on the FO membrane surface and then a high driving force in Sage 2 to alleviate the flux drop. Compared with the stable driving force, the two-stage pattern obtained a better flux performance owing to a mitigation of membrane fouling with thinner layer thickness and less deposited foulants.
机翻摘要
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关键词/主题词
Driving force;Forward osmosis;Membrane fouling;Osmotic membrane bioreactor;Anaerobic reactor;
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