摘要
传统污水处理厂的生化处理过程难以去除部分工业废水中的溶解性难降解有机物,往往需要添加深度处理单元对出水进行进一步处理,以保证达标排放。以某工业园区污水处理厂的生化出水为研究对象,进行臭氧氧化小试和中试试验,考察了以H_(2)O_(2)作为催化剂或市售臭氧催化剂下臭氧氧化对COD_(Cr)的去除效果。研究结果表明:在没有催化剂存在的条件下,臭氧与有机分子主要发生直接氧化作用,难以将有机污染物分子完全矿化至CO_(2);添加催化剂后,臭氧分子在催化剂的作用下生成了具有强氧化性的·OH,对部分难与臭氧反应的有机分子具有无选择性的降解作用,促进了COD_(Cr)的去除。臭氧催化氧化技术虽然具有运行管理简单、无二次污染等优点,但由于其选择性较强,需要在工程应用前期需要进行充分的试验,以确保技术的可行性。
The biochemical treatment process of traditional wastewater treatment plants(WWTPs)is difficult to remove the soluble and refractory organics in some industrial wastewater,and it is often necessary to add advanced treatment units for further treatment of the effluent to ensure compliance with discharge.Aiming at the characteristics of ozone oxidation technology,the biochemical effluent of a WWTP in an industrial park was used as the research object,and the ozone oxidation small and pilot tests were carried out to investigate the COD_(Cr) removal effect of ozone oxidation with H_(2)O_(2) as a catalyst or a commercially available ozone catalyst.The results of the study showed that in the absence of a catalyst,ozone and organic molecules were mainly directly oxidized,and it was difficult to completely mineralize organic pollutant molecules to CO_(2).After adding a catalyst,ozone molecules were formed with strong oxidation under the action of the catalyst.·OH with strong oxidizing property had non-selective degradation effect on some organic molecules that were difficult to react with O_(3),and promoted the removal of COD_(Cr).Although the ozone catalytic oxidation technology has the advantages of simple operation and management,no secondary pollution,etc.,due to its strong selectivity,sufficient tests need to be carried out in the early stage of engineering application to ensure the feasibility of the technology.
作者
赵红兵
余琴芳
许江军
潘杰
奚浩
万年红
刘琪
ZHAO Hongbing;YU Qinfang;XU Jiangjun;PAN Jie;XI Hao;WAN Nianhong;LIU Qi(Central&Southern China Municipal Engineering Design and Research Institute Co.,Ltd.,Wuhan430000,China;Shangyu District Shaoxing Municipal Water Group Co.,Ltd.,Shaoxing312300,China)
出处
《净水技术》
CAS
2022年第6期96-102,共7页
Water Purification Technology
关键词
高级氧化工艺
臭氧氧化
催化
深度处理
工业废水
advanced oxidation process(AOP)
ozone oxidation
catalysis
advanced treatment
industrial wastewater
