生物除铁除锰滤池对As（V）的去除效果研究

采用人工配水模拟天然水体，考察了生物除铁除锰滤池对As（V）的去除性能。结果表明，当原水As（V）含量不高于200wg／L时，生物除铁除锰滤池对铁、锰的去除效果不受砷的影响，且As（V）去除率可达到95％以上，出水铁、锰及砷含量均满足标准限值要求；生物除铁除锰滤池对As（V）的去除主要发生在深度为0～660mm的滤层内；滤柱在反冲洗后，短时期内会出现砷、铁含量超标现象。

Removal effect of As （ V ）by biological iron and manganese removal filter

The removal efficiency of As （ V ） by biological iron and manganese removal filter was investigated by adopting synthetic water distribution which could simulate natural water. The results showed that the removal effect of iron and manganese had no influence on As （ V ） by iron and manganese removal filter when the concentration of As （ V ） in water was no more than 200 p,g/L, and the removal rate of As （ V ） could reach above 95 % , the concentration of effluent iron, manganese and As could satisfy the requirement of standard limit value respectively. The removal effect of As （ V ） by biological iron and manganese removal filter mainly occurred within 0 to 660 mm depth of filter layer. The concentration of As and iron could exceed the standard in short period after backwash of filter cylinder.