长春市八一水库前置库生态净化工程设计

Design of Ecological Purification Project of Bayi Reservoir Pre-dam in Changchun City

前置库是指在水库入口处设置规模相对较小的水库,可实现对入库水体的污染物进行削减,为水库水质提供保障。通过在长春市永春河入八一水库处建设“预处理塘+垂直潜流湿地+表流湿地”组合工艺的前置库生态净化工程,实现了对永春河水质的进一步净化。结果表明:前置库生态净化工程能够有效削减水体污染物,出水COD去除率为50.00%,年去除量为26.95 t;出水NH_(3)-N去除率为77.73%,年去除量为1.84 t;出水TP去除率为72.92%,年去除量为0.38 t。

The pre-dam is a relatively small reservoir set at the inlet of the reservoir,which can reduce the pollutants in the reservoir water and guarantee the water quality of the reservoir.In order to further purify the water quality of Yongchun River,a pre-dam with the combined technology of "pretreatment pond + vertical subsurface wetland + surface wetland" was constructed at the point where Yongchun River enters Bayi Reservoir in Changchun City.The results show that the pre-dam ecological purification project can effectively reduce water pollutants;the removal rate of COD is 50.00 %;the annual removal amount is 26.95 t;the removal rate of NH_(3)-N is 77.73%,and the annual removal amount is 1.84 t;the removal rate of TP is 72.92%,and the annual removal amount is 0.38 t.