黑臭水体治理中环保清淤技术探讨及其工程设计

Technical discussion and project design of ecological dredging in urban black-odorous river treatment

以昆明黑臭水体治理中环保清淤设计为例,针对广普大沟地处城市高密度建成区、淤积多年、底泥有机物含量高、排水能力下降及水体内源污染严重等问题,选用水力冲挖作为主要清淤技术,并根据底泥特点采用土工管袋脱水固化工艺对淤泥进行处理。最终通过工程施工,结合源头补水及沿线截污,使广普大沟黑臭水体得到有效治理,并妥善处置脱水淤泥,以期为后续河道环保清淤和淤泥处理提供借鉴。

Aiming at the characteristics for Guangpu Dagou of located in a high-density built-up area of the city,sediment deposition for a long time,high content of organic matter in the sediment,decreased drainage capacity and serious endogenous pollution,the ecological dredging in the treatment of black-odorous river in Kunming is taken as an example.Dredging by hydraulic power is selected as the main dredging technology,and according to the characteristics of the sediment,the dehydration and solidification process of the geotextile bag is used to treat the sludge.Through engineering construction,combined with clean water replenishment and sewage interception along the line,the black-odorous river of Guangpu Dagou can be effectively treated,and dewatered sludge can be properly disposed of.The purpose of this paper is to provide references for river ecological dredging and sludge treatment in our country.