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杨双林, 邓征宇, 罗 桢, 涂 智, 罗 鑫, 包正铎, 贺卫宁, 陈 宏.典型屋面初期雨水径流污染特征及生物控制中试研究水资源与水工程学报[J].,2023,34(2):91-98
典型屋面初期雨水径流污染特征及生物控制中试研究
A pilot study on pollution characteristics and biological control of initial runoff on typical roof
  
DOI:10.11705/j.issn.1672-643X.2023.02.11
中文关键词:  屋面初期雨水径流  生物滞留设施  装配式高位花坛  微生物群落结构  中试研究
英文关键词:initial roof rainfall runoff  bioretention facility  assembled high-level parterre  microbial community structure  pilot study
基金项目:中国机械工业集团有限公司重大科技专项(SINOMAST-ZDZX-2017-07);湖南省重点研发计划项目(2022SK2091); 湖南省水利科技计划项目(XSKJ2022068-27)
作者单位
杨双林1,2, 邓征宇3, 罗 桢1,2, 涂 智1,2,3, 罗 鑫1,2, 包正铎3, 贺卫宁3, 陈 宏1,2 (1.长沙理工大学 水利与环境工程学院 湖南 长沙 410114 2.洞庭湖水环境治理与生态修复湖南省重点实验室湖南 长沙 410114 3.中机国际工程设计研究院有限责任公司 湖南 长沙 410007) 
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中文摘要:
      为加强城市面源污染控制和推动生物滞留设施的实际应用,通过在线和人工监测方法考察了长沙市典型屋面雨水径流污染的变化规律及装配式高位花坛对污染物的去除性能,并采用Illumina高通量测序手段探究了设施介质中微生物群落的结构组成。结果表明:长沙市屋面初期雨水径流中COD和SS峰值浓度分别为22.9~153.0 mg/L和58.4~294.4 mg/L,具有一定的污染性且二者呈现正相关趋势;污染物浓度峰值出现在降雨开始后的30 min内且随着降雨历时的增加逐渐下降并趋于稳定;降雨量、降雨强度和降雨间隔时间的增加会加剧初期冲刷现象从而进一步恶化屋面径流水质;装配式高位花坛对COD、SS和NH3—N的平均去除率分别为58.3%、85.3%和66.2%,屋面径流经过净化后水质明显改善;介质中的主要优势菌门为变形菌门、放线菌门、酸杆菌门和绿弯菌门,其中变形菌门相对丰度为30.0%~46.6%;反硝化过程更容易在出水端发生。
英文摘要:
      To enhance urban surface source pollution control and promote the practical application of bioretention facilities, we investigated the change patterns of typical roof rainfall runoff pollution and the pollutant removal performance of assembled high-level parterre in Changsha by online and manual monitoring methods, and explored the structural composition of microbial communities in the facility medium by Illumina high-throughput sequencing. The results showed that the concentrations of COD and SS in the initial roof rainfall runoff of Changsha were 22.9-153.0 mg/L and 58.4-294.4 mg/L, respectively, indicating that the initial runoff was highly polluted, and the COD and SS showed a trend of positive correlation. The peak concentration of pollutants occurred within 30 min after the start of rainfall and gradually decreased and stabilized with the increase of rainfall duration. The increase of rainfall volume, rainfall intensity and rainfall interval would aggravate the initial flush and further deteriorate the water quality of roof rainfall runoff. The removal rates of COD, SS and NH3—N in the assembled high-level parterre were 58.3%, 85.3% and 66.2% and above, respectively, and the water quality of the roof rainfall runoff was significantly improved after purification. The main dominant phyla in the medium of high-level parterre were Proteobacteria, Actinobacteria, Acidobacteria and Chloroflexi, among which the relative abundance of Proteobacteria accounted for 30.0%-46.6%. Furthermore, the denitrification process was more likely to occur at the effluent end.
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