再生水回用改善河道水质的研究

Research on River Water Quality Improvement by Reuse of Reclaimed Water

以同心河为研究对象，考察了再生水引入后对河道水质的改善效果。结果表明，再生水引入后，同心河水体的DO浓度明显提高并长期稳定在3mg／L左右，浊度大都降至10NTU以下，COD浓度由150～250mg／L下降到50mg／L左右，氨氮和总磷浓度分别削减了（50％～94％）、（40％～89％），总磷浓度大多控制在0．5mg／L以下，同心河水体水质改善显著。

The effect of reclaimed water from wastewater treatment plant on water quality improve- ment in Tongxin Canal was investigated. The results showed that after reclaimed water was introduced into Tongxin Canal, the content of dissolved oxygen （DO） was increased obviously and kept constant （about 3 mg/L） , the turbidity was reduced to below 10 NTU, and the COD concentration was decreased from 150-250 mg/L to 50 mg/L. In addition, the concentrations of ammonia nitrogen and total phosphorus were reduced by 50% to 94% and 40% to 89%, hal was lower than 0.5 mg/L. The above values respectively. The content of total phosphorus in the casuggested that the water quality of Tongxin Canal was significantly improved.