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| Study of swine farm wastewater treatment using electrochemical membrane bioreactor |
| Received:November 24, 2023 |
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| KeyWord:electrochemistry membrane bioreactor;swine farm;wastewater;electricity generation;pollutant;membrane fouling |
| Author Name | Affiliation | E-mail | | LIU Zhuangzhuang | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | LIU Chongtao | Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610200, China | | | WU Houkai | Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610200, China | | | SONG Jianchao | Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610200, China | | | LI Yangyang | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | TAO Xiuping | Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610200, China | taoxiuping@caas.cn | | JU Ran | Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610200, China | |
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| Abstract: |
| Considering severe membrane fouling of the membrane bioreactor（MBR）and electricity generation characteristics of the microbial fuel cell（MFC）during wastewater treatment, this study constructed a novel electrochemical membrane bioreactor（EMBR） through integration of MBR and MFC. The feasibility and performance of swine farms wastewater treatment using EMBR were investigated in closed-circuit and open-circuit connections. The closed-circuit EMBR achieved a continuous and stable operation. Regarding power generation, the maximum power density, internal resistance, and Coulombic efficiency were 62.7 mW·m-2, 229.1 Ω, and 15.5%, respectively. The removal rate of the closed-circuit EMBR for chemical oxygen demand（COD）, ammonium（NH4+-N）, total nitrogen（TN）, and total phosphorus（TP）were 90.4% ±0.5%, 76.6% ±1.8%, 62.6% ±1.6%, and 70.5% ±3.4%, respectively. Compared with the opencircuit EMBR system, the removal rate of TN increased by 3.8%. The closed-circuit EMBR could effectively mitigate membrane contamination owing to its own generated electric field, and the membrane cleaning cycle was extended by 30% compared to that for the open-circuit EMBR. As an emerging wastewater treatment technology, EMBR can generate electricity for in-situ mitigation of membrane contamination and efficiently remove pollutants from swine farm wastewater. |
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