复合硫杆菌生物淋滤对Mn去除的研究

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。

Study on Mn Removal by Composite Thiobacillus Bioleaching

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.