Abstract The petrochemical wastewater includes many toxic organic compounds, which are refractory substances. It is difficult for the wastewater to meet discharge standards after biological treatment, therefore, the further effective treatment of post-biochemical petrochemical wastewater has become an urgent problem to be solved. This study used iron tartaric acid chelate (ITC) catalytic ozonation to treat the petrochemical wastewater. Various key factors were investigated, such as hydraulic retention time (HRT), catalyst dosage, ozone concentration, initial pH values and oxidation efficiency. The kinetics of catalytic ozonation were established. The results indicate that the chemical oxygen demand (COD) removal rate reached a maximum of 58.5%, when the Fe2+ dosage is 0.25 mmol L−1, the initial pH value is neutral, the liquid phase ozone concentration is about 1.95 mg L−1, and HRT is equal to 180 min. In addition, when HRT is equal to 90 min, the B/C ratio of wastewater increases to 0.31, the catalytic ozone reaches maximum oxidation efficiency, and the most economical HRT was 90 min. Finally, the kinetics of ITC catalytic ozonation catalyzed with ITC is consistent with the pseudo-first-order kinetic reaction, and its rate constant is 0.00484 min−1.

中文翻译：

---

二价酒石酸铁螯合物催化臭氧氧化矿化石化废水生物处理

摘要石化废水中含有多种有毒有机化合物，属于难降解物质。废水经过生物处理后很难达到排放标准，因此，生化后石化废水的进一步有效处理成为迫切需要解决的问题。本研究采用酒石酸铁螯合物（ITC）催化臭氧化处理石化废水。研究了各种关键因素，如水力停留时间 (HRT)、催化剂用量、臭氧浓度、初始 pH 值和氧化效率。建立了催化臭氧化的动力学。结果表明，当Fe2+用量为0.25 mmol L−1、初始pH值为中性、液相臭氧浓度约为1.95 mg L−1时，化学需氧量（COD）去除率最高可达58.5%。 ，HRT 等于 180 分钟。另外，当HRT等于90 min时，废水的B/C比增至0.31，催化臭氧达到最大氧化效率，最经济的HRT为90 min。最终，ITC催化臭氧化的动力学符合准一级动力学反应，其速率常数为0.00484 min−1。