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

作者：Ji Xiaoyu, Liu Xue, Yand Wulin, Xu Tao, Wang Xiang, Zhang Xinquan, Wang Longmian, Mao Xuhui, Wang Xu*

来源出版物：Science of the Total Environment DOI: 10.1016/j.scitotenv.2021.150881出版年：2021

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/m3 to 20.7 ± 0.8 A/m3, 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.

作者关键词: Phosphorus recovery; Microbial electrolysis cell; Biochar; Fertilizer

地址:

(1) School of Resource and Environmental Sciences, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, No. 129 Luoyu Road, Wuhan 430079, China

(2) Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China

(3) College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China

(4) Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Chin

通讯作者地址：Wang Xu;

School of Resource and Environmental Sciences, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, No. 129 Luoyu Road, Wuhan 430079, China

电子邮件地址: xu.wang@whu.edu.cn (Wang Xu .)

影响因子：7.963