复合硫杆菌生物淋滤对Mn去除的研究 |
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引用本文: | 霍金枝,张弛,王增长.复合硫杆菌生物淋滤对Mn去除的研究[J].环境保护科学,2012,38(2):53-56. |
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作者姓名: | 霍金枝 张弛 王增长 |
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作者单位: | 太原理工大学环境科学与工程学院,山西 太原,030024 |
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摘 要: | 通过利用复合硫杆菌(氧化亚铁硫杆菌和氧化硫硫杆菌)在不同接种量(5%,10%,20%)对市政污泥进行生物淋滤实验,探讨了淋滤过程中pH和氧化还原电位(ORP)、Mn的淋滤效果及淋滤过程中其形态的变化。结果表明:该方法能有效淋出污泥中的Mn,生物淋滤12d后,10%接种量反应器Mn的淋出率达到100%;Mn的淋出率受pH和ORP的双重影响,与pH和ORP的关系为:淋出率等于2.439-0.452pH-0.002ORP;各形态中Mn的可交换态和残渣态变化幅度大,从形态变化上表明该淋滤反应对Mn具有有效的淋出;Mn各形态的淋滤能力是:碳酸盐结合态>铁锰氧化物结合态>残渣态>有机物结合态。
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关 键 词: | 市政污泥 生物淋滤 复合硫杆菌 重金属 |
Study on Mn Removal by Composite Thiobacillus Bioleaching |
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Abstract: | By use of composite Thiobacillus(Thiobacillus ferrooxidans and Thiobacillus thiooxidans) at different inoculum quantity(5%,10%,20%) for municipal sludge bioleaching experiments,it investigated the changes of pH and redox potential(ORP) 、leaching effects on Mn and Mn form variation during the process.The results showed that:the method could leach Mn out of the sludge effectively.After 12 days,the leaching out rate of Mn in reactor reached 100% under 10% inoculation rate.Leaching out rate of Mn was affected by pH and ORP,and the relationship was that the leaching out rate was 2.439-0.452pH0.002ORP,changes of the exchangeable form and the residual form of Mn were great,the morphological changes indicated that Mn was leaching out effectively;the leaching abilities of various forms of Mn were as follow:carbonate bound Fe-Mn oxides bound residual fraction organic bound. |
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Keywords: | Municipal Sludge Bioleaching Composite Thiobacillus Heavy Metal |
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