滇池流域污水厂尾水污染负荷特征分析  

Pollution Characteristics of Tail Water from Wastewater Treatment Plants in Dianchi Watershed

作　　者：吴雪 何佳 徐晓梅 鲁露 杨艳 张英 严长安 WU Xue;HE Jia;XU Xiao-mei;LU Lu;YANG Yan;ZHANG Ying;YAN Chang-an(Kunming Institute of Environmental Science,Kunming 650032,China)

机构地区：[1]昆明市环境科学研究院,云南昆明650032

出　　处：《中国给水排水》2018年第17期69-73,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07102-001-001)

摘　　要：滇池流域自1991年起大力建设污水处理厂,截至2015年已建成24座污水处理厂,处理能力达到205×10~4m^3/d,出水水质均能达到一级A标准。然而,目前滇池流域污水厂尾水的TN浓度较高(约为10 mg/L),与《地表水环境质量标准》(GB 3838—2002)存在较大的差距,尾水污染负荷已经成为该流域入湖污染负荷的主要来源之一,其贡献的TN占滇池流域TN入湖总量的59%,部分子流域尾水负荷的贡献率占80%以上,且旱季贡献率大大高于雨季。受纳尾水的河道TN浓度远高于Ⅴ类地表水标准,存在加剧滇池湖体富营养化的风险。为全面提升滇池水质,有必要高度重视污水厂尾水负荷,研究制定地方污水厂排放标准,进一步降低尾水中污染物浓度。From 1991, the local government started to build wastewater treatment plants （WWTPs） in Dianchi watershed. There were in total 24 WWTPs in Dianchi watershed until 2015 and the total treatment capacity reached 2.05 million m3/d. The tail water quality can reache the first grade A standard. However, TN concentration in WWTP tail water exceeds the Environmental Quality Standards for SuoCace Water （ GB 3838 - 2002） now. WWTP tail water has been major sources of the pollutants for Dianchi Lake. TN from tail water accountes for 59% of the total TN load into the lake, and even reaches 80% for some sub-basins. WWTP tail water contributes larger percentage of pollution load in dry season than in wet season. The TN concentration in the receiving rivers largely exceeds class V standard of GB 3838-2002, which might aggravate the risk of eutrophication in Dianchi Lake. To improve the water quality in Dianehi Lake, it is necessary to establish local emission standards for the WWTPs in Dianchi watershed and to reduce the pollutant concentration in tail water.

关 键 词：滇池流域 污水厂尾水 污染负荷 总氮 

分 类 号：TU992.3[建筑科学—市政工程]