Effects of low-concentration Cr(VI) on the performance and the membrane fouling of a submerged membrane bioreactor in the treatment of municipal wastewater |
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| Authors: | Lijie Zhou Wei Jiang Wenshan Guo Huu-Hao Ngo Xiangzhou Meng |
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| Affiliation: | 1. State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, China;2. Shenzhen Water Group Co. Ltd., Shenzhen, China;3. Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, NSW, Australia |
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| Abstract: | The effects of low-concentration Cr(VI) (0.4 mg?l?1) on the performance of a submerged membrane bioreactor (SMBR) in the treatment of municipal wastewater, as well as membrane fouling were investigated. Compared with the SMBR for control municipal wastewater, the SMBR for Cr(VI)-containing municipal wastewater had a higher concentration of soluble microbial products (SMP) with lower molecular weights, and smaller sludge particle sizes. Furthermore, low-concentration Cr(VI) induced membrane fouling, especially irreversible membrane pore blocking, which markedly shortened the service life of the membrane. |
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| Keywords: | submerged membrane bioreactor hexavalent chromium municipal wastewater membrane fouling membrane pore blocking |
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