论文部分内容阅读
利用天然地势坡度开发了一种用于处理绿色建筑小区雨水径流的砾石人工湿地系统,并在深圳市进行了中试研究。结果表明:当雨水径流的SS、TN、NH_3-N、NO_3~--N和TP浓度分别为26.38~432.33、1.23~5.33、0.54~1.36、0.28~3.52、0.06~0.46 mg/L时,砾石湿地系统对其净化效果较好,出水浓度分别为6.22~9.21、0.63~3.16、0.11~0.30、0.11~2.81、0.07~0.11mg/L,各项指标都满足《城市污水再生利用景观环境用水水质》(GB/T 18921—2002)的要求。当进水COD浓度为15.21~53.38 mg/L时,出水浓度为4.25~9.97 mg/L,满足《建筑与小区雨水利用工程技术规范》(GB 50400—2006)中观赏性水景用水水质的要求。但当雨水径流的COD和TP浓度较高,分别为112.50~187.35、0.93~1.57 mg/L时,系统出水浓度分别为60.53~75.95、0.61~0.95 mg/L,不能满足上述标准的要求,因此建议在砾石湿地系统前增加预处理设施,如植被浅沟缓冲带等。
Based on the natural terrain, a gravel constructed wetland system was developed for the treatment of stormwater runoff in green building communities and a pilot study was conducted in Shenzhen. The results showed that when the concentrations of SS, TN, NH_3-N and NO_3 ~ - N and TP in runoff were 26.38 ~ 432.33, 1.23 ~ 5.33, 0.54 ~ 1.36, 0.28 ~ 3.52 and 0.06 ~ 0.46 mg / L, Wetland system to purify its effect is better, the effluent concentrations were 6.22 ~ 9.21,0.63 ~ 3.16,0.11 ~ 0.30,0.11 ~ 2.81,0.07 ~ 0.11mg / L, the indicators are to meet the “urban sewage recycling landscape water quality ”(GB / T 18921-2002) requirements. When the influent COD concentration was 15.21-53.38 mg / L, the effluent concentration was 4.25-9.97 mg / L, which met the requirements of ornamental water quality of water quality in “Project Code for Construction and Residential Rainwater Utilization” (GB 50400-2006). However, when the concentrations of COD and TP in runoff are higher than 112.50 ~ 187.35 and 0.93 ~ 1.57 mg / L respectively, the effluent concentrations in the system are 60.53 ~ 75.95 and 0.61 ~ 0.95 mg / L, respectively, which can not meet the above criteria It is recommended to add pre-treatment facilities such as shallow vegetation buffer zone before gravel wetland system.