Performance of advanced Water treatment plant for removing Fe, Mn and organic pollutants from raw water

摘要

In the case of treating a source water containing higher concentrations of Fe~(2+), Mn~(2+) and organic pollutants, the Fe~(2+) was partially removed by pretreatment steps of aeration-sand filtration, while Mn~(2+) and organics were removed mainly by an ozonation-BAC process. The performance of the advanced treatment plant and removal mechanisms are studied in this paper. The optimal O_3 dosage and residual O_3 were found to be 4 mg l~(-1) and 0.4 mg l~(-1), respectively, for which the Fe~(2+), Mn~(2+) and COD_(Mn) removals reached 98/100, 95/100 and 85.5/100 respectively. GC/MS analytical results showed that the advanced water treatment plant was very efficient in micro-organic pollutant removal.