一株锰氧化细菌AL-6与柚子皮生物炭耦合修复电解锰渣场污染地下水特性研究

The characteristics of a manganese oxidizing bacterium AL-6 coupled with grapefruit peel biochar to repair groundwater polluted by electrolytic manganese slag field

为了研究电解锰渣场污染地下水中复杂废水的修复问题,以农业废弃物柚子皮为原材料制成生物炭作为菌株Acinetobacter baumannii AL-6固定化载体(MBC),得到菌株生物炭耦合体系(MBC)。探究了该耦合体系对含锰、氨氮以及高钙镁离子复合废水的综合处理能力,同时构建序批式间歇反应器(SBR)以探究其在废水处理中的应用潜力。实验结果表明,MBC在48 h内去除了98.46%的锰。与2个独立的实验组(生物炭组,菌株AL-6组)相比,MBC对锰的去除具有良好的协同作用。MBC对锰的平均去除率为15.87 mg/(L·h),是菌株AL-6组的1.09倍,生物炭组的14.33倍。此外,MBC对氨氮的最大去除率为71.92%,对钙镁离子也有一定的去除效果,分别为41.46%和26.95%。在SBR中,MBC能去除90.1%的锰和85.44%的氨氮。结果表明,微生物固定化具有巨大的应用潜力,可用于处理电解锰渣复合污染废水。

In order to study the remediation of complex wastewater from the groundwater polluted by the electrolytic manganese slag field,the biochar made from pomelo peel was used as the immobilized carrier for the strain Acinetobacter baumannii AL-6(MBC),and the strain biochar coupling system(MBC)was obtained.The comprehensive treatment performance of the coupling system for composite wastewater containing manganese,ammonia nitrogen and high calcium and magnesium ions was investigated,and a Sequential Batch Reactor(SBR)was constructed to explore its application potential in wastewater treatment.The experimental results showed that MBC removed 98.46%of manganese within 48 h.Compared with two independent experimental groups(biochar group and strain AL-6 group),MBC had an excellent synergistic effect on the removal of manganese and the average removal rate of manganese was 15.87 mg/(L∙h),1.09 times of that of the strain AL-6 and 14.33 times of that of the biochar group.In addition,MBC had a maximum removal rate of 71.92%for ammonia nitrogen,and also had a certain removal effect for calcium and magnesium ions,with removal rates of 41.46%and 26.95%,respectively.In the SBR,90.1%of manganese and 85.44%of ammonia nitrogen were removed.The results show that immobilized biochar of strain AL-6 made from pomelo peel has great potential and can be used to treat wastewater polluted by electrolytic manganese slag.