Nitrogen recovery from wastewater using microbial fuel cells  

作　　者：Yong XIAO Yue ZHENG Song WU Zhao-Hui YANG Feng ZHAO 

机构地区：[1]Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China [2]College of Environmental Science and Engineering, Hunan University, Changsha 410082, China

出　　处：《Frontiers of Environmental Science & Engineering》2016年第1期185-191,共7页环境科学与工程前沿（英文）

基　　金：This study was supported by the Natural Science Foundation of Fujian （No. 2012J05105）, the National Natural Science Foundation of China （Grant No. 51208490）, the Knowledge Innovation Program of the Chinese Academy of Sciences （No. IUEQN201306） and the Hundred Talents Program of the Chinese Academy of Sciences.

摘　　要：Nitrogen is one of major contaminants in wastewater; however, nitrogen, as bio-elements for crop growth, is the indispensable fertilizer in agriculture. In this study, two-chamber microbial fuel cells （MFCs） were first operated with microorganisms in anode chamber and potassium ferricyanide as catholyte. After being success- fully startup, the two-chamber MFCs were re-constructed to three-chamber MFCs which were used to recover the NO-3 -N and NH＋4 -N of synthetic wastewater into value- added nitrogenous fertilizer from cathode chamber and anode chamber, respectively. Ferric nitrate was used as the sole electron acceptor in cathode, which also was used to evaluate the NO-3 -N recover efficiency in the case major anion of NO3 in cathode. The output voltage of these MFCs was about 600-700 mVat an external load of 500 Ω. About 47% NH＋4 -N in anode chamber and 83% NO-3 -N in cathode chamber could be recovered. Higher current density can selectively improve the recovery efficiency of both NH＋4-N and NO3 -N. The study demonstrated a nitrogen recovery process from synthetic wastewater using three-chamber MFCs.Nitrogen is one of major contaminants in wastewater; however, nitrogen, as bio-elements for crop growth, is the indispensable fertilizer in agriculture. In this study, two-chamber microbial fuel cells （MFCs） were first operated with microorganisms in anode chamber and potassium ferricyanide as catholyte. After being success- fully startup, the two-chamber MFCs were re-constructed to three-chamber MFCs which were used to recover the NO-3 -N and NH＋4 -N of synthetic wastewater into value- added nitrogenous fertilizer from cathode chamber and anode chamber, respectively. Ferric nitrate was used as the sole electron acceptor in cathode, which also was used to evaluate the NO-3 -N recover efficiency in the case major anion of NO3 in cathode. The output voltage of these MFCs was about 600-700 mVat an external load of 500 Ω. About 47% NH＋4 -N in anode chamber and 83% NO-3 -N in cathode chamber could be recovered. Higher current density can selectively improve the recovery efficiency of both NH＋4-N and NO3 -N. The study demonstrated a nitrogen recovery process from synthetic wastewater using three-chamber MFCs.

关 键 词：nitrogen recovery microbial fuel cells（MFCs） ELECTROMIGRATION wastewater treatment 

分 类 号：TQ441.41[化学工程—化学肥料工业] TM911.45[电气工程—电力电子与电力传动]