Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
Environ Res. 2022 Dec;215(Pt 2):114300. doi: 10.1016/j.envres.2022.114300. Epub 2022 Sep 10.
The emission standards for textile printing and dyeing wastewater are stricter due to serious environmental issues. A novel technology, hydrodynamic cavitation combined with ozone (HC + O), has attracted wide attention in wastewater advanced treatment, whereas the contaminants removal mechanism and transformation of dissolved organic matter (DOM) were rarely reported. This study investigated the removal efficiency and mechanism of HC + O. The maximum removal rates of UV, chrominance, COD, and TOC were 64.99%, 91.90%, 32.30%, and 36.67% in 60 min, respectively, at the inlet pressure of 0.15 MPa and O dosage of 6.25 mmol/L. The synergetic coefficient of HC + O was 2.77. The removal of contaminants was the synergy of O, ·OH and ·O, and high molecular weight and strong aromaticity organic matters were degraded effectively. The main components in DOM were tryptophan-like and tyrosine-like, which were effectively removed after HC + O. Meanwhile, most DOM had decreased to low apparent relative molecular weight (LARMW) compounds. Additionally, the HC + O effluent can reach the emission standard in 60 min for 8.07 USD/m. It can be concluded that HC + O is an effective technology for the advanced treatment of industrial wastewater. This study will provide suggestions for the engineering application of HC + O.
由于纺织印染废水存在严重的环境问题，其排放标准更加严格。一种新的技术——空化水动力学联合臭氧（HC+O）——在废水深度处理中引起了广泛关注，然而，有关污染物去除机制和溶解有机物（DOM）转化的研究却很少。本研究探讨了 HC+O 的去除效率和机制。在入口压力为 0.15 MPa 和 O 剂量为 6.25 mmol/L 的条件下，经过 60 min，UV、色度、COD 和 TOC 的最大去除率分别为 64.99%、91.90%、32.30%和 36.67%。HC+O 的协同系数为 2.77。污染物的去除是 O、·OH 和·O 的协同作用，高分子量和强芳香性有机物得到了有效降解。DOM 的主要成分是色氨酸样和酪氨酸样，经过 HC+O 处理后被有效去除。同时，大部分 DOM 已降解为低表观相对分子质量（LARMW）化合物。此外，HC+O 出水在 60 min 内即可达到 8.07 美元/m 的排放标准。可以得出结论，HC+O 是一种有效的工业废水深度处理技术。本研究将为 HC+O 的工程应用提供建议。
