化工园区废水处理过程中溶解性有机物变化特征  

Variation Characteristics of Dissolved Organic Matter in Wastewater Treatment Process of Chemical Industrial Park

作　　者：周合喜 罗华瑞 李华伟 卫少华 安娜[1] 肖维贵[1] 刘礼祥 钱东 张金松[1] ZHOU He-xi;LUO Hua-rui;LI Hua-wei;WEI Shao-hua;AN Na;XIAO Wei-gui;LIU Li-xiang;QIAN Dong;ZHANG Jin-song(Shenzhen Water Group Co.Ltd.,Shenzhen 518000,China;School of Environment,Tsinghua University,Beijing 100084,China;Shenzhen Water and Environment Investment Group Co.Ltd.,Shenzhen 518000,China;Rudong Yangkou Town People’Government,Nantong 226407,China;Rudong Shenshui Environmental Technology Co.Ltd.,Nantong 226407,China)

机构地区：[1]深圳市水务<集团>有限公司,广东深圳518000 [2]清华大学环境学院,北京100084 [3]深圳市环水投资集团有限公司,广东深圳518000 [4]如东县洋口镇人民政府,江苏南通226407 [5]如东深水环境科技有限公司,江苏南通226407

出　　处：《中国给水排水》2022年第23期80-87,共8页China Water & Wastewater

基　　金：深圳市科技创新委员会应用示范和可持续发展专项(KJYY20171012140149523、KCXFZ202002)。

摘　　要：溶解性有机物(DOM)的去除情况是化工园区废水达标排放的关键,因此深入解析废水中DOM的特性是对其高效去除的前提。以江苏省沿海某化工园区综合废水处理厂为研究对象,通过亲疏水性测定、凝胶色谱分子质量分级、紫外可见光谱、三维荧光光谱和红外光谱,系统解析了沿程不同处理单元DOM的变化特征。结果表明,全流程处理工艺对DOC、COD和UV254的去除率分别为78.6%、81.1%和93.7%,出水水质满足江苏省《化学工业水污染物排放标准》(DB 32/939—2020)。废水中DOM以亲水性物质为主,且随着沿程处理单元亲水性增强。废水中DOM的分子质量主要分布在1000~3000 u,经水解酸化池、中间水池、高效澄清池、臭氧催化氧化池和活性炭罐处理后,对DOM的去除率达到89.8%,紫外可见吸收光谱明显减弱。通过平行因子分析模型解析出5种荧光组分,包括2种腐殖酸类物质和3种蛋白质类物质,其中组分3的荧光强度最大,生化处理和活性炭吸附是其主要去除途径。红外光谱结果表明,废水的成分复杂,但末端活性炭罐对烷烃、芳香族、酚类、酯类、羧酸类甚至卤代烃类化合物均有较好的吸附效果。The removal of dissolved organic matter(DOM)is the key to reach the wastewater discharge standard in chemical industry parks.Therefore,in-depth analysis of the characteristics of DOM in wastewater is the premise of its efficient removal.The DOM variation characteristics of different treatment units along the process of a comprehensive wastewater treatment plant in a coastal chemical industry park in Jiangsu Province were systematically analyzed through hydrophilicity/hydrophobicity determination,gel chromatography molecular weight classification,UV-visible spectrum,three-dimensional fluorescence spectrum and infrared spectrum.The removal rates of DOC,COD and UV254 of the whole process were 78.6%,81.1%and 93.7%,respectively,and the effluent quality met the local standard of Jiangsu Province:Discharge Standard of Water Pollutants for Chemical Industry(DB 32/939-2020).The DOM in wastewater was mainly hydrophilic substances,and the hydrophilicity increased along the treatment units.The molecular weight of DOM in wastewater was mainly distributed in the range of 1000-3000 u.After the treatment of hydrolytic acidification tank,intermediate tank,high efficiency clarifier,ozone catalytic oxidation tank and activated carbon filter,the removal rate of DOM reached 89.8%,and the UV-visible absorption spectrum was significantly weakened.Five fluorescence components,including two humic acids and three protein substances,were analyzed by parallel factor analysis model.The fluorescence intensity of component 3 was the highest,and biochemical treatment and activated carbon adsorption were the main removal pathways.The infrared spectrum results showed that the composition of wastewater was complex.However,the terminal activated carbon filter had a good performance for the adsorption of alkanes,aromatics,phenols,esters,carboxylic acids and even halogenated hydrocarbons.

关 键 词：溶解性有机物 化工园区废水 亲疏水性 分子质量分布 光谱解析 

分 类 号：TU992[建筑科学—市政工程]