基于城镇黑臭河道水体的组合型原位生态修复系统的构建与效果:以上海市地区某黑臭河道为例

CONSTRUCTION AND EFFECT OF COMBINED IN-SITU ECOLOGICAL RESTORATION SYSTEM FOR URBAN BLACK AND ODOROUS RIVER WATER:A CASE STUDY IN A BLACK AND ODOROUS RIVER IN SHANGHAI

为促进组合型原位生态修复技术对城镇黑臭河道水体治理效果的工程应用,基于“原位生态修复、截污控源、营造景观、水动力改善、生物多样性”的修复理念,以生物修复方式为主,结合河道黑臭的成因与水质检测分析,构建了“微生物载体缓释+曝气复氧+水生植物+循环泵设备”组合型生态修复系统,对上海市地区某黑臭河道进行工程试验研究。工程实践表明:试验进行56 d时,河道上、中、下游COD、NH_(3)-N和TP平均去除率分别达到71.25%、84.10%和89.94%,水体黑臭现象基本消除;水体DO质量浓度由1.1 mg/L上升到4.5 mg/L。河道水质修复得到明显改善,符合GB 3838—2002《地表水环境质量标准》Ⅳ类水质标准。该组合型生态修复系统可以有效消除水体黑臭现象,增加水体溶氧量,有效降解水体中的有机污染物,对城镇黑臭河道生态修复具有较好的净化和景观效果,同时其切实可行的工程技术措施可为类似工程提供良好借鉴。

To investigate the application of combined in-situ ecological restoration technology for the treatment of urban black and odorous river water bodies,based on the restoration concept of in situ ecological restoration,pollution interception and source control,landscape creation,hydrodynamic improvement,and biodiversity.The bioremediation method was mainly used,and the source analysis and water quality tests were conducted.A combined ecological restoration system of microbial carrier slow release+aeration and reoxygenation+aquatic plants+circulation pumping equipment was constructed to conduct an engineering trial study on a black and odorous river in Shanghai.The engineering practice showed that the average removal rates of COD,NH_(3)-N and TP in the upper,middle,and lower reaches of the river reached 71.25%,84.10%and 89.94%,respectively,after the test was carried out for 56 days,and the black odor phenomenon was eliminated.The dissolved oxygen content in water increased from 1.1 mg/L to 4.5 mg/L.The water quality restoration of the river was significantly improved and upgraded to ClassⅣof China's Surface Water Environmental Quality Standard(GB 3838-2002).The combined ecological restoration system could effectively eliminate the black and odorous phenomenon,increase the dissolved oxygen content,and degrade the organic pollutants in the water body,and has good purification and landscape effect on black and odorous water bodies in cities and towns.This case can provide practical references for the similar projects.