【摘要】 以污水厂二沉池剩余污泥作为固定化微生物吸附重金属的实验对象,从某污水处理厂活性污泥取样筛选出了一株高效重金属Ni²⁺吸附菌Z-2,通过分子生物学鉴定,确定其为苏云金芽孢杆菌,并考察了Z-2的重金属吸附性能。结果表明,菌株Z-2对Ni²⁺具有较强的吸附性,投加3g/L （湿重）的菌体,对50mg/L Ni废水中吸附去除率达到30.67%,菌株Z-2对Ni²⁺的吸附过程能很好地用吸附模型Langmuir方程,为更好地实现微生物吸附处理污泥中重金属离子工业化提供依据。更多还原

【Abstract】 The excess sludge of the secondary sedimentation tank of the sewage treatment plant was used as the experimental object for the adsorption of heavy metals by immobilized microorganisms.A high-efficiency heavy metal Ni2 +adsorption bacterial strain Z-2 was screened from the activated sludge of a sewage treatment plant and identified by molecular biology.It was identified as bacillus thuringiensis,and the heavy metal adsorption performance of Z-2 was examined.The results showed that the strain Z-2 had strong adsorption to Ni2 +,and the cells with 3 g/L(wet weight)were added,and the adsorption removal rate of the wastewater of 50 mg/L Ni reached30.67%.The adsorption process of Ni2 +can well use the Langmuir equation of adsorption model to provide a basis for better industrialization of heavy metal ions in sludge adsorption treatment.更多还原