南京城区某黑臭排涝水体综合整治

Engineering Application for Comprehensive Treatment of an Urban Black and Odorous River in Nanjing

以南京市江宁区杨家圩河道为例,通过对河道周边排口、水质等状况进行调查,探讨河道水环境综合整治的方案设计及工程应用,并取得了一定的成果。结果表明,通过对该河道采取控源截污、集成式生物强化系统、多功能综合生态湿地、水下曝气复氧、生态组合修复以及环保清淤等综合整治措施,河道水质指标均有极大改善,溶解氧浓度从均值0.48 mg/L上升到均值3.04 mg/L,提升了5.96倍,而氨氮、总磷和COD分别平均降低了66.94%、78.73%和57.84%,基本达到《地表水环境质量标准》(GB 3838—2002)Ⅴ类标准。

Taking Yangjiawei River in Jiangning District of Nanjing as an example,the project design and engineering application of river comprehensive regulation were discussed after investigation of surrounding discharge outlets and water quality.The results showed that the comprehensive regulation practices including source control and interception,integrated bioaugmentation system,multifunctional integrated wetland,underwater aeration reoxygenation,ecological restoration and environmental dredging had obviously improved the water quality.For example,the average DO concentration increased by 5.96 times from 0.48 mg/L in the original river to 3.04 mg/L in the treated river,and the NH3-N,TP and COD concentrations decreased by 66.94%,78.73% and 57.84% respectively,which achieved the criteria of levelⅤin Environmental Quality Standards for Surface Water(GB 3838-2002).