摘要
针对高盐焦化废水降解困难,难以达标排放或影响零排放结晶盐纯度,而传统以吸附为主的技术存在成本高等问题,基于傅里叶变换离子回旋共振质谱(FT-ICR-MS)对高盐焦化废水难降解有机物进行了识别分析,对比了不同高级氧化工艺对高盐焦化废水的预处理效果,并进一步耦合生物活性炭(BAC)工艺进行深度处理。FT-ICR-MS分析表明,焦化废水中难降解有机物多为氮杂环化合物,极为稳定。UV/O_(3)-BAC耦合工艺能够将难降解有机物分解,并进一步将其吸附增浓耦合生物降解实现去除。UV/O_(3)-BAC耦合工艺处理后,生化出水COD和TOC的去除率分别为85%和86%,RO浓水分别为78%和81%,出水TOC质量浓度可降低到20.5 mg/L,实现了深度净化。
In view of the difficulty in degrading high salinity coking wastewater,the difficulty in meeting the discharge standards or affecting zero-emission crystalline salt purity,and the high cost of traditional adsorption-based technologies,the hard-degradable organic matters in high salinity coking wastewater were identified and analyzed based on Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR-MS),and the pretreatment effects of different advanced oxidation processes on high salinity coking wastewater were compared,and further coupled with biological activated carbon(BAC)process for advanced treatment.The results of FT-ICR-MS analysis showed that,the hard-degradable organic matters in coking wastewater are mostly nitrogen heterocyclic compounds,which are extremely stable.The UV/O_(3)-BAC coupling process can decompose the said organic matters,and further remove them by adsorption,concentration and coupling biodegradation.After the treatment by UV/O_(3)-BAC coupling process,the removal rates of COD and TOC from biochemical effluent were 85%and 86%respectively,the RO concentrated water were 78%and 81%respectively,the mass concentration of TOC in the effluent water were reduced to 20.5 mg/L,achieving deep purification.
作者
吕新春
吕青檐
张勇
张承锋
沈古体
韩京龙
郝智能
王爱杰
LV Xinchun;LV Qingyan;ZHANG Yong;ZHANG Chengfeng;SHEN Guti;HAN Jinglong;HAO Zhineng;WANG Aijie(Luxi Chemical Group Co.,Ltd.,Liaocheng 252211,China;School of Environment,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China;Research Center for Eco-Environmental Sciences,China Academy of Sciences,Beijing 100083,China)
出处
《工业用水与废水》
2025年第3期47-55,共9页
Industrial Water & Wastewater
关键词
焦化废水
高级氧化
生物活性炭
高盐废水
深度处理
coking wastewater
advanced oxidation
bio-activated carbon
high salinity wastewater
advanced treatment
