The threat of dye contamination has achieved an unsurpassed abnormal state lately due to their massive consumption in several enterprises including textile, leather, cosmetic, plastic, and paper industries. This review focuses on the integrations of various advanced oxidation processes (AOPs), such as Fenton, photocatalysis, and ozonation, with biodegradation for the treatment of textile azo dyes. Such integrations have been explored lately by researchers to bring down the processing cost and improve the degree of mineralization of the treated dyeing wastewater. The review refers to the basic mechanisms, the influence of various process parameters, outcomes of recent works, and future research directions. All the three AOPs, independently, demonstrated substantial color reduction of 54–100%. The ozonation process, stand-alone, showed the most efficient decolorization (of 88–100%) consistently in all reviewed research works. In contrast, all three AOPs independently offered varied and inadequate COD reduction in the range of 16–80%. The AOPs, after getting integrated with biodegradation, yielded an additional reduction (of 11–70%) in the COD-levels and (of 16–80%) in the TOC-levels. Further, the integration of AOPs with biodegradation has potential to significantly reduce the treatment costs. The review suggests further research efforts in the direction of sequencing chemical and biological routes such that their synergistic utilization yield complete detoxification of the textile azo dyes economically at large-scale.

中文翻译：

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先进氧化工艺与生物降解相结合处理含偶氮染料的纺织废水的综合综述

由于染料在纺织，皮革，化妆品，塑料和造纸等行业的大量消费，近来染料污染的威胁已达到无法超越的异常状态。这篇综述着重于将各种先进的氧化过程（AOP）（如Fenton，光催化和臭氧化）与生物降解处理纺织品偶氮染料的集成。研究人员最近已经探索了这种整合，以降低处理成本并提高处理后的印染废水的矿化度。综述涉及基本机制，各种工艺参数的影响，近期工作成果以及未来研究方向。所有这三个AOP都独立地显示出54-100％的显着颜色减少。臭氧化过程，独立进行，在所有审阅的研究作品中均显示出最有效的脱色效果（88–100％）。相比之下，所有三个AOP分别提供了16％至80％范围内的各种COD减少和不足。与生物降解相结合后，AOP在COD水平上和TOC水平上分别减少了（11–70％）（16–80％）。此外，将AOP与生物降解相结合具有显着降低治疗成本的潜力。该综述建议在化学和生物途径测序的方向上进行进一步的研究，以使它们的协同利用可大规模经济地完全降解纺织品偶氮染料。所有三个AOP均单独提供了16％至80％范围内的各种COD减少和不足。与生物降解相结合后，AOP在COD水平上和TOC水平上分别减少了（11–70％）（16–80％）。此外，将AOP与生物降解相结合具有显着降低治疗成本的潜力。该综述建议在化学和生物途径测序的方向上进行进一步的研究，以使它们的协同利用可大规模经济地完全降解纺织品偶氮染料。这三个AOP均单独提供了16％至80％范围内的各种COD减少和不足。与生物降解相结合后，AOP在COD水平上和TOC水平上分别减少了（11–70％）（16–80％）。此外，将AOP与生物降解相结合具有显着降低治疗成本的潜力。该综述建议在化学和生物途径的测序方向上进行进一步的研究，以使它们的协同利用可大规模经济地完全消除纺织品偶氮染料的排毒作用。AOP与生物降解的整合具有显着降低治疗成本的潜力。该综述建议在化学和生物途径的测序方向上进行进一步的研究，以使它们的协同利用可大规模经济地完全消除纺织品偶氮染料的排毒作用。AOP与生物降解的整合具有显着降低治疗成本的潜力。该综述建议在化学和生物途径测序的方向上进行进一步的研究，以使它们的协同利用可大规模经济地完全降解纺织品偶氮染料。