焦化废水深度处理工艺优化研究  

Study on Advanced Treatment Process Optimization of Coking Wastewater

作　　者：李小亚 赵海霞 栗勇田 付时翔 李军波 王志鑫 Li Xiaoya;Zhao Haixia;Li Yongtian;Fu Shixiang;Li Junbo;Wang Zhixin(Hebei Tianda Environmental Research Institute Co.,Ltd,Baoding 071025,Hebei,China)

机构地区：[1]河北天大环境研究院有限公司,河北保定071025

出　　处：《绿色科技》2024年第12期53-58,77,共7页Journal of Green Science and Technology

摘　　要：为有效解决焦化废水中总氮和COD_(Cr)难降解的问题,对工业园区内的焦化企业产生的焦化废水深度处理工艺进行了优化试验。工业园区企业终端出水COD_(Cr)和总氮分别为148.4~374.8 mg/L和28.71~147.31 mg/L。通过工艺比选,采用了“AO+DN/DC”工艺和“臭氧+催化氧化”工艺对焦化废水进行处理。结果表明:“AO+DN/DC”工艺中废水COD_(Cr)和总氮的去除率分别为89%和95%,“臭氧+催化氧化”工艺中COD_(Cr)的去除率为44.2%,出水的COD_(Cr)≤40mg/L,TN≤15 mg/L,达到了或者优于《城镇污水处理厂污染物排放标准》(GB18918-2002)中一级A标准,可满足企业回用要求。“AO+DN/DC”和“臭氧+催化氧化”深度处理组合工艺有效提高了焦化废水中总氮和COD_(Cr)的去除效果,对同行业的废水处理具有一定的参考价值。In order to effectively solve the problem of difficult degradation of total nitrogen and COD_(Cr) in coking wastewater,the optimization of the deep treatment process for coking wastewater generated by coking enterprises in industrial parks was experimentally studied.The effluent concentration of COD_(Cr) and total nitrogen of industrial park enterprises were 148.4~374.8 mg/L and 28.71~147.31 mg/L,respectively.Through the process selection,AO+DN/DC process and Ozone+Catalytic Oxidation process were adopted to treat the coking wastewater.Experimental results showed that the removal rates of COD_(Cr) and total nitrogen in wastewater were 89%and 95%in AO+DN/DC process,and the removal rates of COD_(Cr) in Ozone+Catalytic Oxidation process were 44.2%.The effluent COD_(Cr)≤40 mg/L and TN≤15 mg/L was better than the requirements of Emission Standard of Pollutant Discharge Standard for Urban Sewage Treatment Plants(GB18918-2002),Grade A standard,and could meet the requirements of enterprise reuse.The advanced treatment process of AO+DN/DC and Ozone+catalytic oxidation effectively improved the removal effect of total nitrogen and COD_(Cr) in coking wastewater,which had certain guiding significance for wastewater treatment in the same industry.

关 键 词：焦化废水 深度处理 工艺优化 AO+DN/DC 臭氧+催化氧化 

分 类 号：X52[环境科学与工程—环境工程]