Case analysis on the treatment of black and odorous water body in Shuanggangchong River, Guangzhou City

Guangzhou City has made positive progress in the treatment of urban black and odorous water bodies and obtained some advanced experiences and typical cases. Taking the Shuanggangchong River in Guangzhou City as an example of the remediation of black and odorous water bodies, three aspects of water environmental problems identification, remediation ideas and measures, as well as the remediation effectiveness were summarized and analyzed. To address the problems such as ineffective interception of sewage in Shuanggangchong River Watershed, serious pollution of small and micro water bodies, the encroachment of river channels, and the lack of management, a technical route of source control, pollution interception, dredging, water replenishment, and management was proposed for the implementation of black and odorous water body treatment. Among them, a technology of Daphnia magna inducing aquatic ecosystems construction was used for the restoration of 3 fish ponds around the Shuanggangchong River, constructing an Daphnia magna+submerged plants+microorganisms symbiotic system for water quality purification and restoration of a natural aquatic ecosystem. After the remediation of the Shuanggangchong River, the black and odorous water body was eliminated and the river features of Lingnan-water-town were also restored.