Electricity-driven ammonia oxidation and acetate production in microbial electrosynthesis systems  

作　　者：Qinjun Liang Yu Gao Zhigang Li Jiayi Cai Na Chu Wen Hao Yong Jiang Raymond Jianxiong Zeng 

机构地区：[1]Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation,College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou 350002,China [2]State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China

出　　处：《Frontiers of Environmental Science & Engineering》2022年第4期27-36,共10页环境科学与工程前沿（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.51908131);the Natural Science Foundation of Fujian Province(No.2020J01563);the Special Fund of State Key Joint Laboratory of Environment Simulation and Pollution Control(No.19K05ESPCT);the CAS Key Laboratory of Environmental and Applied Microbiology&Environmental Microbiology Key Laboratory of Sichuan Province,Chengdu Institute of Biology,Chinese Academy of Sciences(No.KLCAS-2019-1).

摘　　要：Microbial electrosynthesis(MES)is an emerging technology for producing chemicals,and coupling MES to anodic waste oxidation can simultaneously increase the competitiveness and allow additional functions to be explored.In this study,MES was used for the simultaneous removal of ammonia from synthetic urine and production of acetate from CO_(2).Using graphite anode,83.2%±5.3%ammonia removal and 28.4%±9.9%total nitrogen removal was achieved,with an energy consumption of 1.32 kWh/g N for total nitrogen removal,0.45 kWh/g N for ammonia nitrogen removal,and 0.044 kWh/g for acetate production.Using boron-doped diamond(BDD)anode,70.9%±12.1%ammonia removal and 51.5%±11.8%total nitrogen removal was obtained,with an energy consumption of 0.84 kWh/g N for total nitrogen removal,0.61 kWh/g N for ammonia nitrogen removal,and 0.043 kWh/g for acetate production.A difference in nitrate accumulation explained the difference of total nitrogen removal efficiencies.Transport of ammonia and acetate across the membrane deteriorated the performance of MES.These results are important for the development of novel elcctricity-driven technologies for chemical production and pollution removal.

关 键 词：BIOCATHODE Carbon dioxide Electrochemical oxidation Graphite anode Boron-doped diamond 

分 类 号：TQ22[化学工程—有机化工]