Development of a Sulfate‐Reducing Biological Process To Remove Heavy Metals from Acid Mine Drainage
Development of a Sulfate‐Reducing Biological Process To Remove Heavy Metals from Acid Mine Drainage
复制标题
开发硫酸盐还原生物工艺去除酸性矿山排水中的重金属
DOI：
10.2175/106143000x138102
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发表时间：
2000
影响因子：
3.1
通讯作者：
G. Sayles
中科院分区：
文献类型：
--
作者：
Vicki S. Steed;M. Suidan;M. Gupta;T. Miyahara;C. Acheson;G. Sayles
采用三种厌氧反应器：上流式厌氧污泥床(UASB)反应器、填料滤池反应器和部分填充塑料悬浮圈的滤池反应器，对硫酸盐还原菌去除酸性矿山废水等水体中重金属的可行性进行了评价。填充式过滤反应器去除了99%以上的进水金属。根据出水金属浓度和污泥浓度，部分填充式反应器的性能更好。尽管UASB反应器降低了溶解铁的浓度，但出水总悬浮固体浓度仍大于18g/L，这表明UASB反应器没有作为有效的澄清器运行，因此UASB反应器在4个月后停止运行。填充式过滤反应器并联运行，接受含有重金属组合的进水。通过从这些反应器底部抽走污泥，控制了金属沉淀物和生物量等固体物质的积累。除锰外，大多数金属的流出物浓度都很低，往往低于饮用水标准。
The feasibility of using sulfate‐reducing bacteria to remove heavy metals from aqueous streams such as acid mine drainage was evaluated using three anaerobic reactors: an upflow anaerobic sludge blanket (UASB) reactor, a packed filter reactor, and a filter reactor that was partially packed with floating plastic pall rings. The packed filter reactors removed more than 99% of the influent metals. The performance of the partially packed reactor was superior based on effluent metal and sludge concentrations. Although the UASB reactor reduced the concentration of dissolved iron, the effluent concentration of total suspended solids remained greater than 18 g/L. This elevated solids concentration indicated that the UASB reactor was not operating as an effective clarifier, and, as a result, UASB reactor operation was discontinued after 4 months. The packed filter reactors were operated in parallel and received influent containing a combination of heavy metals. By withdrawing sludge from the bottom of these reactors, the accumulation of solids such as metal precipitates and biomass was controlled. The effluent concentrations of most metals were low, often less than drinking water standards, with the exception of manganese.