再生水厂退水对受纳水体水质和水生态的影响—以清河为例  

Impact of the effluent of wastewater treatment plants on the water quality and ecology in receiving water bodies—A case study of Qing River

作　　者：朱利英 刘静[2,3] 辛苑 于雯超 郁达伟 王亚炜[1,4] 徐宇峰 魏源送[1,4,7] ZHU Liying;LIU Jing;XIN Yuan;YU Wenchao;YU Dawei;WANG Yawei;XU Yufeng;WEI Yuansong(State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085;State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085;Institute of Plant Nutrition,Resources and Environment,Beijing Academy of Agriculture and Forestry Sciences,Beijing 100097;Laboratory of Water Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085;College of Environmental Science&Engineering,Beijing Forestry University,Beijing 100083;Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin University of Technology,Guilin 541004;University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]中国科学院生态环境研究中心环境模拟与污染控制国家重点联合实验室,北京100085 [2]中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085 [3]北京市农林科学院植物营养与资源环境研究所,北京100097 [4]中国科学院生态环境研究中心水污染控制实验室,北京100085 [5]北京林业大学环境科学与工程学院,北京100083 [6]桂林理工大学广西环境污染控制理论与技术重点实验室,桂林541004 [7]中国科学院大学,北京100049

出　　处：《环境科学学报》2023年第5期89-99,共11页Acta Scientiae Circumstantiae

基　　金：国家水体污染控制与治理科技重大专项(No.2017ZX07102,2017ZX07102-002)。

摘　　要：为明确再生水水厂退水对水体水质和水生态的影响,本研究分别于2010年和2020年对清河再生水厂退水口及其上下游开展了水质和水生态调查.实地调查结果表明,与2010年相比,2020年清河再生水厂退水口河段平均pH由6.44上升为8.38,整体呈弱碱性;水质类别从劣V3类提升至地表水IV类,水环境质量明显改善;主要阳离子由Na+为主转向以Ca^(2+)为主,阴离子Cl-、SO42-等浓度降幅分别为88.85%和93.75%;2020年该河段水化学类型为Ca-HCO_(3)型,盐渍化趋势明显.水生态状况转变与水质转变趋势一致,主要浮游植物种类由蓝藻门(Cyanophyta)向硅藻门(Bacillariophyta)转变,浮游动物以原生动物、轮虫和枝角类为主,再生水厂下游浮游生物群落多样性指数H’升高,浮游生物群落结构更为复杂.统计分析结果表明,COD、NO_(3)^(-)-N等含氮营养物和Ca^(2+)、HCO_(3)^(-)、Cl-等阴阳离子是影响清河再生水厂退水口河段浮游生物主要类群密度和群落多样性的主要因素.To clarify the impact of wastewater treatment plants(WWTPs)effluent on water quality and ecology condition,this study investigated the water quality and aquatic ecological conditions of the Qing River WWTP effluent and its upstream and downstream in 2010 and 2020.Results showed that compared with 2010,the average of pH increased from 6.44 to 8.38,with an overall weak alkalinity in 2020.The quality of water environment was improved from Class V3 to Class IV(Surface Water Quality Standard of China(GB 3838-2002)),the water quality has improved significantly.The main cations changed from Na+to Ca^(2+),and the anions concentrations of Cl-and SO42-decreased by 88.85%and 93.75%,respectively.The water chemistry type in 2020 was Ca-HCO_(3) type with obvious salinization trend.The change of water ecological condition was consistent with the trend of water quality,the main phytoplankton community changed from Cyanophyta to Bacillariophyta,the zooplankton was dominated by protozoa,rotifers,and branchiopods.The plankton community diversity index H’increased in the downstream of the RWTP,and the community structure of plankton was more complex.Statistical analysis results indicated that COD,nitrogenous nutrients such as NO_(3)^(-)-N,anions,and cations such as Ca^(2+),HCO_(3)^(-)and Cl-were the main factors influencing the abundance and community diversity of the plankton main taxa in the river section of the Qing River WWTP.

关 键 词：再生水厂 清河 水质 水生态 

分 类 号：X832[环境科学与工程—环境工程] X171.1