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新型微生物脱盐电池处理重金属铬废水

Keywords: 微生物脱盐电池,脱盐,产电,铬去除

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Abstract:

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5g/L,阴极室为铁氰化钾溶液,闭合体系瞬时获得最高电压650mV,同时脱盐效果良好,该MDC成功启动。其后,阴极室以重金属铬(200mg/L)废水作为电子受体,中间室初始盐浓度为20g/L、35g/L,Cr(Ⅵ)平均还原率分别为1.06mg/(L·h)和0.64mg/(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%(20g/L)和88.95%(35g/L)。中间室盐浓度20g/L时,获得最大输出电压466.6mV,最大体积功率密度98.6mW/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。

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