标題: Sustainable phosphorus recovery from wastewater and fertilizer production in microbial electrolysis cells using the biochar-based cathode

作者: Ji, XY (Ji, Xiaoyu); Liu, X (Liu, Xue); Yang, WL (Yang, Wulin); Xu, T (Xu, Tao); Wang, X (Wang, Xiang); Zhang, XQ (Zhang, Xinquan); Wang, LM (Wang, Longmian); Mao, XH (Mao, Xuhui); Wang, X (Wang, Xu)

來源出版物: SCIENCE OF THE TOTAL ENVIRONMENT 卷: 807 文獻号: 150881 DOI: 10.1016/j.scitotenv.2021.150881 子輯: 2 出版年: FEB 10 2022

摘要: Reducing the energy consumption and electrode cost for electrochemical recovery of phosphorus (P) from wastewater is crucial for the large-scale application. In this study, biochar electrodes were investigated as the low-cost cathode in a microbial electrolysis cell (MEC) and this P-enriched biochar electrode was directly retrieved as P fertilizer after wastewater treatment. The Fe2+ salt modified biochar significantly increased the electrochemical performance of MECs due to the improved electrical conductivity and cathodic activity. Compared to the pristine biochar cathode, the current density of the MEC increased from 16.8 +/- 0.2 A/m(3) to 20.7 +/- 0.8 A/m(3), and the P removal increased from 28.8% +/- 1% to 62.4% +/- 3.5%. The power consumption was 0.25 +/- 0.01 kWh/kg P which was more than one order of magnitude lower than the previous report. It was also demonstrated that the P enriched biochar amended soil improved the Pakchoi cultivation. (C) 2021 Elsevier B.V. All rights reserved.

作者關鍵詞: Phosphorus recovery; Microbial electrolysis cell; Biochar; Fertilizer

地址: [Ji, Xiaoyu; Xu, Tao; Wang, Xiang; Zhang, Xinquan; Mao, Xuhui; Wang, Xu] Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, 129 Luoyu Rd, Wuhan 430079, Peoples R China.

[Liu, Xue] Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China.

[Yang, Wulin] Peking Univ, Coll Environm Sci & Engn, Beijing 100871, Peoples R China.

[Wang, Longmian] Minist Ecol & Environm, Nanjing Inst Environm Sci, Nanjing 210042, Peoples R China.

通訊作者地址: Wang, X (通訊作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, 129 Luoyu Rd, Wuhan 430079, Peoples R China.

電子郵件地址: xu.wang@whu.edu.cn

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