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根据硫酸盐还原菌(SRB)的生物矿化原理设计了一套连续碱度产生系统(SAPS)反应器,以市政污水处理厂的活性污泥为SRB提供源,南方常见的香芋柄为有机物碳源,选用石灰石为反应器中碱度层填充物,进行实验室模拟SAPS处理酸性矿山废水(AMD)的应用研究,实验结果表明,SAPS处理酸性矿山废水的方法是具有技术可行的:SRB利用有机碳源生长代谢,产生碱度、还原SO2-4和降解COD。最终废水p H从进水4.0左右上升到出水7.0左右;出水COD降低到约200 mg/L;SO2-4还原为各种硫化物,其还原率约为61%;不同金属离子在有机层和碱度层发生反应产生沉淀,其中Fe2+、Cu2+和Zn2+的去除效率分别约为76%、78.5%和82%,而主要靠物理吸附作用的Mn2+去除率较低;初次模拟SAPS运行到56 d时,系统最终因有机碳源不足而各项指标不再改变。
Based on the biomineralization principle of sulfate-reducing bacteria (SRB), a set of continuous alkalinity generation system (SAPS) reactor was designed. The activated sludge of municipal sewage treatment plant was provided as SRB. The common taro stem in the south was organic Carbon source, limestone was selected as the alkalinity layer filler in the reactor, and the application of laboratory simulated SAPS in the treatment of acid mine drainage (AMD) was studied. The experimental results show that SAPS treatment of acidic mine wastewater is technically feasible: SRB utilization Organic carbon source growth and metabolism, alkalinity, SO2-4 reduction and degradation of COD. The final wastewater p H increased from about 4.0 to about 7.0 effluent; the effluent COD was reduced to about 200 mg / L; the SO2-4 reduced to various sulfides, with a reduction rate of about 61%; different metal ions in the organic layer and Alkalinity layer, the removal efficiencies of Fe2 +, Cu2 + and Zn2 + are about 76%, 78.5% and 82% respectively, while the removal rate of Mn2 + mainly by physical adsorption is low. When the initial simulated SAPS operation reaches 56 days , The system finally due to lack of organic carbon resources and the indicators no longer change.