某黄金矿山低浓度含氰废水处理技术研究

针对某黄金矿山低浓度含氰废水开展氰化物去除试验研究,分别考察过氧化氢氧化法、亚铁盐沉淀法、因科法和生物氧化液法处理效果。结果表明:4种方法均能将总氰化合物处理至0. 5 mg/L以下,其中生物氧化液法不产生药剂成本,亚铁盐沉淀法药剂成本仅为0. 10元/m^3。从工艺可行性方面考虑,生物氧化液法需要控制溶液pH值为6,不易实现,推荐采用亚铁盐沉淀法。生物氧化液法为矿山企业处理低浓度含氰废水提供了一个新的思路。

Technical research on the treatment of low-concentration cyanide wastewater in a gold mine

Experimental study on cyanide removal from low-concentration cyanide wastewater in a gold mine is carried out,investigating the treatment performance of hydroperoxide oxidation, ferrous salt precipitation, INCO and biooxidation solution method. The results show that the 4 methods all can lower the total cyanide below 0. 5 mg/L. The biooxidation solution method doesn’t generate reagent cost while the ferrous salt precipitation reagent cost is merely 0. 10 yuan/m^3. In terms of feasibility,the pH in the biooxidation solution method should be controlled at 6 which is not easily reached,so the ferrous salt precipitation method is recommended. The biooxidation solution method provides a new perspective in the treatment of low-concentration cyanide wastewater for mining enterprises.