钒冶金废水微生物异化还原过程
Dissimilatory reduction process of vanadium(V) in metallurgical wastewater by Rhodoferax ferrireducens
查看参考文献18篇
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文摘
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以微生物燃料电池为研究工具,研究Rhodoferax ferrireducens(R.f )异化还原钒(Ⅴ)的过程.在对R.f进行NaVO_3耐性驯化实验的基础上,考查NaVO_3废水浓度、pH值和温度对R.f还原钒(Ⅴ)的影响.结果表明:适量钒元素对微生物生长具有促进作用,微生物的生长趋势及周期与钒(Ⅴ)的还原趋势及周期基本相同;初期由于钒化合物的生物效应促进葡萄糖消耗量增加,葡萄糖氧化分解过程产生小分子有机酸,使溶液pH降低,但钒(Ⅴ)还原过程需要H+的参与,且R.f异化作用也消耗部分小分子有机酸,后期溶液pH升高.经优化其培养条件为:温度30 ℃、搅拌速度150 r/min、pH为7.5时,在NaVO_3含量为300 mg/L的钒废水中,R.f对钒(Ⅴ)的还原率为76%,细菌总数达到1.1×10~9 cfu/mL. |
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其他语种文摘
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The process of Rhodoferax ferrireducens(R.f ) dissimilatory reduction of V~(5+) in waste water was studied by the means of microbial fuel cell(MFC).Based on the inoculation test of tolerance to NaVO_3 of R.f, the effects of NaVO_3 concentration in the wastewater, pH and temperature on R.f reducing V~(5+) were investigated.The results show that adequate vanadium can promote the growth of microbes, and the tendency and cycle of R.f growth are essentially the same as that of V~(5+) reducing.In beginning period, the bioeffect of vanadium compound increases the consumption of glucose, and the glucose is oxidized to the small molecule organic acids, which leads to pH value fall.But H~+ should be engaged in V~(5+) reduction, and the dissimilatory reduction of R.f will also consume some small molecule organic acids, which makes pH increase later.The optimized culture conditions are as follows:temperature 30 ℃, stirring speed 150 r/min, pH 7.5, NaVO_3 concentration in the vanadium wastewater 300 mg/L.The reduction rate of V~(5+) by R.f is 76%, and the total R.f count reaches 1.1×10~9 cfu/mL. |
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来源
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中国有色金属学报
,2009,19(9):1700-1705 【核心库】
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关键词
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钒冶金废水
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Rhodoferax ferrireducens
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微生物燃料电池
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异化还原
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地址
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1.
中国科学院过程工程研究所, 生化工程国家重点实验室, 北京, 100080
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北京科技大学土木与环境工程学院, 北京, 100083
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1004-0609 |
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学科
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电工技术;行业污染、废物处理与综合利用 |
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基金
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国家自然科学基金
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国家863计划
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国家“十一五”科技支撑计划项目
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文献收藏号
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CSCD:3712028
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