磁混凝工艺处理市政废水中的污染物去除特征研究  

The pollutants removal in municipal wastewater treatment by magnetic coagulation technology

作　　者：郑利兵[1,2] 焦赟仪 陈梅雪[1,2] 王哲晓 张鹤清 吴振军 黄光华 于雯超 魏源送[1,2] ZHENG Libing;JIAO Yunyi;CHEN Meixue;WANG Zhexiao;ZHANG Heqing;WU Zhenjun;HUANG Guanghua;YU Wenchao;WEI Yuansong(State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco⁃Environmental Sciences,Chinese Academy of Sciences,Beijing 100085;Laboratory of Water Pollution Control Technology,Research Center for Eco⁃Environmental Sciences,Chinese Academy of Sciences,Beijing 100085;SCIMEE Technology&Science Co.,Ltd,Chengdu,Chengdu 610045)

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,水污染控制实验室,北京100085 [3]中建环能科技股份有限公司,成都610045

出　　处：《环境科学学报》2020年第6期2118-2127,共10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⁃002);中国科学院课题“中⁃斯水技术研究与示范中心”。

摘　　要：本研究对2个磁混凝站点进行了水质分析与溶解性有机物(DOM)的系统表征,考察了市政废水在磁混凝过程中的污染物去除效果与DOM去除特征,分析了强化磁混凝过程关键作用.研究发现:磁混凝可显著去除浊度、悬浮态有机物和磷,2个站点TCOD和TP去除率分别为52.53%/76.78%和64.41%/81.59%.市政废水DOM组成复杂,内源性DOM占比较高,两个站点DOM种类相似,但B站点进水有机物含量略少,且芳香类DOM占比较低.磁混凝对DOM具有显著的去除效果,主要去除高腐殖化程度、芳香性、聚合度、疏水性的大分子有机物,络氨酸类蛋白是主要的去除物质.B站点强化药剂的投加显著提升DOM和氨氮的去除效果,TOC和氨氮的去除率可达40.01%和36.08%,同时磷和TCOD的混凝效果也得到一定强化.本研究揭示了磁混凝过程污染物去除特征,促进了磁混凝过程的理解,为磁混凝在水处理中的推广应用提供了有效支撑.The water quality and dissolved organic matters(DOM)of the two water plants applied with magnetic coagulation(MC)technology were systematically analyzed,the pollutants removal performance and the feature of DOM were studied,and the key role of MC was analyzed.It was found that turbidity,undissolved organic matters,and phosphorus can be effectively removed,as the remove efficiency of TCOD and TP of the two plants were 52.53%/76.78%and 64.41%/81.59%,respectively.The DOM composition in municipal wastewater was complicated,which was mainly endogenous-derived.The feedwater of plant B has lower organic matters concentration,and the aromatic organic matters showed lower proportion.All kinds of DOM can be reduced by MC process,especially for DOM with high degree of humification,aromaticity,polymerization,hydrophobicity,and molecular weight,especially for tyrosine.The addition of chemicals could significantly enhance the removal efficiency of DOM and ammonia,which was 40.01%and 36.08%.And the coagulation efficiencies for TCOD and phosphorus also increased.This work reveals the feature of pollutants removal in municipal wastewater treatment,promoting the understanding of the MC process,and offer supporting for its application in wastewater treatment.

关 键 词：磁混凝 市政废水 溶解性有机物 三维荧光光谱 紫外可见光谱 

分 类 号：X703[环境科学与工程—环境工程]