新型微生物脱盐电池处理重金属铬废水  

Treatment of chromium wastewater by new microbial desalination cells

作　　者：陈衬[1] 汪家权[1] 陈少华[2] 陆飞[1] 杨金萍[1] 杨方[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,合肥230009 [2]合肥工业大学机械与汽车工程学院,合肥230009

出　　处：《环境工程学报》2013年第5期1843-1848,共6页Chinese Journal of Environmental Engineering

基　　金：国家"水体污染控制与治理"科技重大专项巢湖课题(2012ZX07103-004)

摘　　要：构建一种新型三室微生物脱盐电池(MDC),研究其脱盐产电并同步处理污染废水的效果。结果表明,阳极室为葡萄糖溶液,中间室盐溶液浓度5 g/L,阴极室为铁氰化钾溶液,闭合体系瞬时获得最高电压650 mV,同时脱盐效果良好,该MDC成功启动。其后,阴极室以重金属铬(200 mg/L)废水作为电子受体,中间室初始盐浓度为20 g/L、35 g/L,Cr(Ⅵ)平均还原率分别为1.06 mg/(L.h)和0.64 mg/(L.h),两者Cr(Ⅵ)的去除率均能达到80%以上,脱盐率分别为81.64%(20 g/L)和88.95%(35 g/L)。中间室盐浓度20 g/L时,获得最大输出电压466.6 mV,最大体积功率密度98.6 mW/m3,最佳内阻655.8Ω,库仑效率1.16%。表明该MDC系统具有良好的脱盐效果和处理废水效果。A new three-chamber microbial desalination cell（MDC） was designed to study its capability of desalination, power generation and simultaneous wastewater treatment. The results showed that under the closed system,the maximum voltage output is 650 mV and good salt removal efficiency is obtained with glucose as the substrate（in the anode chamber） , ferricyanide as the electron acceptor （in the cathode chamber） and salt con-centration 5 g/L in the middle chamber, which suggested that the MDC is started up successfully. Then,the chro- mium wastewater （200 mg/L） is used as the electron acceptor in the cathode chamber with different initial salt concentrations in the middle chamber （20 g/L and 35 g/L）. And the average reduction rate of Cr（ Ⅵ ） are 1.06 mg/（L · h） and 0.64 mg/（ L · h）, respectively（both the Cr（ Ⅵ ） removal rate can reach more than 80% ）, and the salt removals at each initial salt concentration are 81.64% （20 g/L） and 88.95% （35 g/L）. When ini-tial salt concentration is 20 g/L, the maximum voltage and volume power density is obtained at 466.4 mV and 98.6 mW · m^-3, the best inner-resistance is 655.8 Ω,and coulombic efficiency is 1.16%. The results indicated that the MDC has a significant effect on desalination and wastewater treatment.

关 键 词：微生物脱盐电池 脱盐 产电 铬去除 

分 类 号：X52[环境科学与工程—环境工程]