微电解-生物法处理酸性重金属矿山地下水

为使莱芜某矿的酸性地下水得到利用，对该地下水中所含锌、铜、铅3种重金属离子的去除方法进行了试验研究。试验将原水首先通过铸铁屑和活性炭组成的微电解反应器预处理30min，然后进入后续的厌氧生物反应器进行生化处理4h。结果表明，当厌氧生物反应器内搅拌机的转速为40r／min时，出水的pH为7左右，出水中Zn^2＋、Cu^2＋和Ph^2＋的浓度分别为0．20mg／L、0．08mg／L和0．06mg／L，微电解一生物法组合工艺对3种金属离子的去除率均大于99％，处理后的水质指标达到了矿山选矿工艺用水的要求，且不存在二次污染问题。

Treating Acidic Heavy Metal-Containing Mine Underground Water by Microelectrolysis-Microbe Method

In order to utilize the acidic mine underground water in a mine in Laiwu,investigation was made on the removal of zinc,copper and lead heavy metal ions from this underground water.The water was first pretreated for 30 minutes in a microelectrolysis reactor composed of cast iron chips and active carbon,and then was treated in the downstream anaerobe reactor for 4 hours.The results showed that the concentrations of Zn~(2+),Cu~(2+) and Pb~(2+) in the discharged water were 0.20 mg/L,0.08 mg/L and 0.06 mg/L respectively at the conditions of a 40 r/min revolution of the agitator of the anaerobe reactor and a pH value of about 7.This micro-electrolysis and microbe combined method can have a heavy metal ions removal rate of greater than 99% and the quality of the treated water can satisfy the requirements of beneficiation.Meanwhile,there is no secondary contamination.