School of the Environment, Nanjing University, Nanjing, 210023, PR China.
School of the Environment, Nanjing University, Nanjing, 210023, PR China; School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, PR China.
Chemosphere. 2022 Sep;303(Pt 3):135157. doi: 10.1016/j.chemosphere.2022.135157. Epub 2022 May 28.
The novel cascaded catalytic ozonation-enhanced coagulation process (FeCeAC/O-PAC) was developed with much success towards second effluent organic matter (EfOM) in chemical industrial wastewater. Compared with the conventional techniques, FeCeAC/O-PAC exhibited remarkable performances in the advanced removal of EfOM. The characteristics of EfOM and interactivities of reaction process played the crucial roles. Especially, the removal rate constant of soluble microbial products (SMPs) with FeCeAC/O-PAC exceeded 55.38% versus FeCeAC/O. The outstanding synergistic effect was contributed to the enhanced generation of active oxygen species by FeCeAC and PAC, which increased the content of oxygen-containing functional groups of EfOM and thus facilitated the interaction between PAC and EfOM. As the result, the larger-sized flocs could be formed and separated easily. Herein, this work found a far more effective way to remove EfOM especially low-coagulability refractory organics (LCRO) in chemical sewage plant.
新型级联催化臭氧强化混凝工艺（FeCeAC/O-PAC）在去除化工废水中的二级出水中的有机物（EfOM）方面取得了巨大成功。与传统技术相比，FeCeAC/O-PAC 在 EfOM 的深度去除方面表现出了显著的性能。EfOM 的特性和反应过程的相互作用起着关键作用。特别是，FeCeAC/O-PAC 对可溶性微生物产物（SMPs）的去除率常数超过了 55.38%，而 FeCeAC/O 则没有。这种突出的协同效应归因于 FeCeAC 和 PAC 增强了活性氧物质的生成，增加了 EfOM 中含氧官能团的含量，从而促进了 PAC 和 EfOM 之间的相互作用。结果是，形成了更大尺寸的絮体并且更容易分离。在这项工作中，发现了一种更有效的方法来去除 EfOM，特别是在化工污水处理厂中的低可凝聚性难降解有机物（LCRO）。
