城市内河污染综合治理及生态修复效果分析——以无锡芙蓉塘为例

Analysis of Comprehensive Treatment of Urban Inland River Pollution and Ecological Rehabilitation——Taking Furong Pond in Wuxi as an Example

针对城市内河的生态环境问题,本文采用设置水位控制闸门、安放曝气增氧装置、投放微生物试剂及除磷剂、种植人工水草及水生植物、设置生态浮床等综合治理生态修复技术对无锡市芙蓉塘水体因水体污染、富营养化等引起的黑臭现象进行治理。治理后,溶解氧(DO)达到并稳定在地表Ⅳ类水质,氨氮(NH_3-N)、总磷(TP)水平已经接近地表Ⅴ类水质,水体透明度(SD)主流达到63 cm,支流达到123 cm,水体氧化还原电位(ORP)恢复正常水质。生物多样性增加,表观效果显著改善。结果表明,综合治理生态修复技术对景观污染水体改善较为适宜。此次综合治理生态修复的方法治理芙蓉塘的实践经验,可为同类型城市内河的治理修复工作提供一定参考。

Aiming at the ecological environmental problems of the urban inland rivers,comprehensive treatment and ecological restoration technologies such as setting up water level control gates,installing aeration and aeration devices,putting in microbial reagents and phosphorus removal agents,planting artificial aquatic plants and aquatic plants,and setting up ecological floating beds are used to control the black and odor caused by water pollution and eutrophication in the Furongtang Pond of Wuxi City in this paper.After treatment,DO reached and stabilized at surface water quality of Grade IV,NH3-N and TP levels were close to surface water quality of Grade V,SD mainstream reached 63 cm,and tributary reached 123 cm,the water ORP returned to normal water quality.The biodiversity has increased and the apparent effect has been significantly improved.The results show that comprehensive treatment of ecological restoration techniques is more suitable for improving landscape polluted water bodies.The practical experience of the comprehensive management and ecological restoration method in the treatment of Furong Pond can provide a certain reference for the treatment and restoration of the same type of urban inland river.