摘要
【目的】随着工业化进程加速,城镇污水处理厂接纳工业废水日益普遍。由于工业废水水量、水质波动大,有毒、难降解污染物种类复杂,有必要对纳入城镇污水处理厂的工业废水水质进行综合评估,并采取针对性措施。文章以深圳市G水质净化厂工业废水预处理段“混凝沉淀+催化臭氧氧化”工艺为对象,系统评估其对液晶面板企业尾水的处理效能,重点关注毒性削减、有机物转化及对活性污泥功能的影响。【方法】文章利用常规指标检测、毒性评价、相对分子质量表征、光谱分析等多种检测手段对处理效能进行了评估分析。【结果】企业尾水平均COD、BOD5/COD和发光细菌急性毒性分别为35.3 mg/L、0.073和32.0%;混凝和催化臭氧氧化出水COD平均去除率为2.0%和5.8%,可生化性没有显著变化,发光细菌发光抑制率分别下降7.3%和9.4%;经预处理工艺后活性污泥反硝化性能无法完全恢复。尾水中相对分子质量为1000~3000 Da的有机物含量最高,占比为60.3%;经催化臭氧工艺,相对分子质量在588~1556 Da的紫外吸收类物质增加3.6%。三维荧光光谱分析表明,催化臭氧氧化工艺能有效去除芳香蛋白类有机物。【结论】混凝+催化臭氧氧化预处理工艺能显著降低液晶面板企业尾水的生物毒性,有效去除部分大分子有机物,并减轻其对活性污泥硝化功能的抑制;但对其可生化性提升及反硝化功能抑制的解除效果有限。建议G水质净化厂以毒性削减为导向,优化该预处理工艺运行条件。
[Objective]With the accelerated advancement of industrialization,the acceptance of industrial wastewater by municipal wastewater treatment plants(WWTPs)has become increasingly prevalent.Considering large fluctuations in the quantity and quality of industrial wastewater and its complexity of toxic and refractory pollutants,it is necessary to conduct a comprehensive assessment of the quality of industrial wastewater entering municipal WWTPs and to implement targeted measures.This paper systematically evaluated the treatment efficiency of the'coagulation-sedimentation+catalytic ozonation'process in the industrial wastewater pretreatment at Shenzhen G WWTP for liquid crystal panel manufacturing effluent,with a focused assessment on toxicity reduction,organic matter transformation,and impacts on activated sludge functionality.[Methods]Multiple analytical approaches were employed,including conventional parameter monitoring,toxicity evaluation,molecular weight characterization,and spectroscopic analysis.[Results]The result showed that the average COD,BOD5/COD and luminous bacteria's acute toxicity of the influent were 35.3 mg/L,0.073 and 32.0%,respectively.The average COD removal rates of coagulation and catalytic ozonation effluent were 2.0%and 5.8%,respectively.There was no significant change in biodegradability,and the luminous inhibition rates of luminescent bacteria were reduced by 7.3%and 9.4%,respectively.The denitrification performance of the activated sludge could not be completely restored after pretreatment.The content of organic matter with relative molecular mass from 1000 Da to 3000 Da was the highest in the influent,accounting for 60.3%;the relative molecular mass of UV-absorbing organic matter from 588 Da to 1556 Da increased by 3.6%by catalytic ozone process.Three-dimensional fluorescence spectrum analysis showed that the catalytic ozonation process could effectively remove aromatic proteins.[Conclusion]The coagulation-coupled catalytic ozonation pretreatment process significantly reduced the bio-toxicity of industrial effluent from the liquid crystal display panel manufacturer,effectively removed certain macromolecular organic compounds,and alleviated its inhibition on nitrification functions in activated sludge systems.However,it demonstrated limited effectiveness in enhancing biochemical treatability and mitigating denitrification inhibition.It is recommended that G WWTP optimize the operational conditions of this pretreatment process by targeting the reduction of bio-toxicity.
作者
张敬敬
安娜
肖维贵
张庆珮
张金松
ZHANG Jingjing;AN Na;XIAO Weigui;ZHANG Qingpei;ZHANG Jinsong(Shenzhen Water and Environment Group Co.,Ltd.,Shenzhen 518000,China;School of Civil and Environmental Engineering,Harbin University of Technology,Shenzhen,Shenzhen 518000,China)
出处
《净水技术》
2025年第8期116-121,153,共7页
Water Purification Technology
基金
国家重点研发计划(2021YFC3200605)。
关键词
工业废水
城镇污水处理厂
混凝沉淀
催化臭氧氧化
效能评估
industrial wastewater
municipal WWTP
coagulation and sedimentation
catalytic ozonation
efficiency evaluation
