Hu Dongxue, Liu Lixue, Liu Wenyu, Yu Liqiang, Dong Jian, Han Fei, Wang Hongcheng, Chen Zhaobo, Ge Hui, Jiang Bei, Wang Xin, Cui Yubo, Zhang Wanjun, Zhang Ying, Liu Shuchen, Zhao Longmei
Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, Dalian Minzu University, 18 Liaohe Road West, Dalian Economic and Technological Development Zone, Dalian 116600, China; College of Environment and Resources, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, China.
State Key Laboratory of Urban Water Resource and Environment, School of Civil & Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, China.
Water Res. 2022 Apr 15;213:118153. doi: 10.1016/j.watres.2022.118153. Epub 2022 Feb 2.
Electrochemical anaerobic membrane bioreactor attracted attention due to stable treatment quality with low footprint, and draw solute has significant effect on the sludge characteristics and membrane fouling performance. In this pilot-scale study, an electrochemical anaerobic membrane bioreactor (E-AnMBR) was proposed for treating pesticide wastewater at different hydraulic retention times (HRTs), demonstrating that E-AnMBR was superior on improvement of sludge characteristics and mitigation of membrane fouling, compared with the conventional anaerobic membrane bioreactor (C-AnMBR). E-AnMBR reduced sludge yield by 41.2 ± 6.7% and the SVI was significantly decreased by 32.5±13.8%. The accumulation of VFA in E-AnMBR was slighter than that of C-AnMBR, and the minimum average VFA was 255±6 mg/L. The methane yield of E-AnMBR (0.22-0.29 L CH/g COD) was 1.2-1.4 times than that of C-AnMBR. The EPS contents in suspended and attached sludge of E-AnMBR were significantly reduced by 41.8 ± 3.3% and 77.4 ± 14.5% than that of C-AnMBR, respectively. These results suggested that E-AnMBR has lower sludge disposal pressure, higher stability and methane recovery potential. Not only that, E-AnMBR successfully reduced membrane resistance, delaying the fouling rate by 31.0-38.5%. Finally, the linear relationship between EPS characteristics and membrane pollution was determined.
电化学厌氧膜生物反应器因其处理质量稳定、占地面积小而受到关注，且汲取溶质对污泥特性和膜污染性能有显著影响。在这项中试规模研究中，提出了一种电化学厌氧膜生物反应器（E-AnMBR）用于在不同水力停留时间（HRT）下处理农药废水，结果表明，与传统厌氧膜生物反应器（C-AnMBR）相比，E-AnMBR在改善污泥特性和减轻膜污染方面更具优势。E-AnMBR使污泥产量降低了41.2±6.7%，污泥体积指数（SVI）显著降低了32.5±13.8%。E-AnMBR中挥发性脂肪酸（VFA）的积累比C-AnMBR少，最低平均VFA为255±6mg/L。E-AnMBR的甲烷产量（0.22 - 0.29L CH/g COD）是C-AnMBR的1.2 - 1.4倍。E-AnMBR悬浮污泥和附着污泥中的胞外聚合物（EPS）含量分别比C-AnMBR显著降低了41.8±3.3%和77.4±14.5%。这些结果表明，E-AnMBR的污泥处置压力更低、稳定性更高且具有甲烷回收潜力。不仅如此，E-AnMBR成功降低了膜阻力，将污染速率延缓了31.0 - 38.5%。最后，确定了EPS特性与膜污染之间的线性关系。
