基于催化膜耦合颗粒活性炭阴极的微生物燃料电池体系处理焦化废水  

Microbial fuel cell system with catalytic electrode membrane and granular activated carbon in treating coking wastewater

作　　者：张倩[1] 柳丽芬[1,2] ZHANG Qian;LIU Lifen(School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China;School of Ocean Science&Technology,Dalian University of Technology,Panjin 124221,China)

机构地区：[1]大连理工大学环境学院,大连116024 [2]大连理工大学海洋科学与技术学院,盘锦124221

出　　处：《环境工程学报》2021年第4期1270-1278,共9页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(21677025)。

摘　　要：含难降解污染物的工业废水,处理难度大、成本高,如未达标却大量排放,会造成严重的水体污染并威胁生态平衡和人类健康。为了开发高效、节能和可持续的环保技术,制备了新型催化电极膜组件,并内置活性炭颗粒或负载二氧化锰的活性炭颗粒,以扩大阴极的总体积,研究了其在11 L上流式微生物燃料电池与膜生物反应器耦合系统中对焦化废水的处理效果,考察了其对系统的产电性能和废水处理效果。结果表明,在产电和水处理成效上,催化电极膜内放置负载二氧化锰的活性炭颗粒阴极的耦合体系>催化电极膜内置活性炭颗粒阴极的体系>碳纤维布电极内置活性炭颗粒阴极的体系。碳纤维负载催化剂电极膜及内置活性炭颗粒阴极的系统,最大功率密度为1041.35 mW·m^(-3),比仅用碳纤维布的电极膜内置活性炭颗粒阴极的对照组,提高了7.4倍,系统内阻也由309Ω减小至104Ω,有效降低了能量损耗。催化电极膜内置负载二氧化锰活性炭颗粒阴极的耦合系统,可高效去除焦化废水中的COD和NH4+-N,去除率最高可达95.75%和92.81%;COD去除负荷为1.55 kg·(m^(3)·d)^(-1),比对照组提高了25%。增大阴极曝气速率,可提高COD去除效率(另一焦化废水,出水COD值低于40 mg·L^(-1),达到一级排放标准);COD去除负荷达到1.67 kg·(m^(3)·d)^(-1)。该耦合体系对焦化废水具有较好的处理效果和较高的产电能力,可为焦化废水等工业废水的处理提供一种有效可行的新方法。It is difficult and costly in treating various types of wastewater containing refractory pollutants,and the discharge of a large amount of substandard industrial wastewater will cause pollution that seriously threaten the ecological balance and human health.For efficient,energy-saving and sustainable wastewater treatment,new catalytic electrode membrane with enclosed granular activated carbon(GAC)or manganese dioxide loaded GAC(MnO2/GAC)were used to expand the cathode volume in a 11-L up-flow microbial fuel cell(MFC)integrated with membrane bioreactor(MBR)system.The electricity generation performance and pollutants removal effect of this MFC-MBR system were investigated when it treated coking wastewater.The results showed that the order of electricity generation and pollutants removal was the MFC-MBR system with catalytic electrode membrane and enclosed MnO2/GAC cathode>the system using catalytic electrode membrane with enclosed GAC as cathode>the system using only carbon fiber cloth electrode and enclosed GAC as cathode.The maximum power density of the system with catalytic electrode membrane with enclosed GAC as cathode was 1041.35 mW·m^(-3),which was 7.4 times higher than the control group that only using carbon fiber cloth electrode and enclosed GAC as cathode.The internal resistance decreased from 309 to 104Ω,that effectively reduced the internal energy loss of the system.The system with catalytic electrode membrane and enclosed MnO2/GAC cathode could efficiently remove 95.75%COD and 92.81%NH4+-N from coking wastewater;COD removal loading was 1.55 kg·(m^(3)·d)^(-1) and 25%higher than the control group.When treating another coking wastewater,increasing aeration in the cathode could increase the COD removal efficiency,and the COD concentration in the effluent was less than 40 mg·L^(-1),reaching the first-level discharge standard,the COD removal loading was 1.67 kg·(m^(3)·d)^(-1).The MFC-MBR coupled system had better pollutant removal and higher electricity generation performance in treating coking waste

关 键 词：微生物燃料电池 电催化 焦化废水 膜生物反应器 产电性能 

分 类 号：X703[环境科学与工程—环境工程]