Abstract：
Chlorination is the most widely used disinfection technology due to its simplicity and continuous disinfection ability. However, the drawbacks of disinfection by-products and chlorine-resistant bacteria have gained increasing attention. Nowadays, ferrate (Fe(VI)) is a multifunctional and environmentally friendly agent which has great potential in wastewater reclamation and reuse. This study investigated synergistic Fe(VI) and chlorine technology for reclaimed water disinfection in terms of microbial control and chlorine decay mitigation. Specifically, synergistic disinfection significantly improved the inactivation efficiency on total coliform, Escherichia coli and heterotrophic bacteria compared to sole chlorination. Synergistic disinfection also exhibited superior performance on controlling the relative abundance of chlorine-resistant bacteria and pathogenic bacteria. In addition, the decay rate of residual chlorine was relatively lower after Fe(VI) pretreatment, which was beneficial for microbial control during the reclaimed water distribution process. Technical and economic analyses revealed that synergistic Fe(VI) and chlorine disinfection was suitable and feasible. Results of this study are believed to provide useful information and alternative options on the optimization of reclaimed water disinfection.
摘要：
氯化由于其简单和连续消毒能力，是最广泛使用的消毒技术。然而,消毒副产物和耐氯细菌的缺点越来越受到关注。如今,高铁酸盐（Fe（VI））是一种多功能的环境友好剂，在废水回收和再利用中具有巨大的潜力。这项研究从微生物控制和氯腐烂缓解的角度研究了Fe（VI）和氯的协同技术用于再生水消毒。具体来说,协同消毒显著提高了总大肠杆菌的灭活效率，大肠杆菌和异养细菌与单独氯化相比。协同消毒在控制耐氯细菌和病原菌的相对丰度方面也表现出优异的性能。此外,Fe(VI)预处理后，余氯的衰减率相对较低，有利于再生水分配过程中的微生物控制。技术经济分析表明，Fe（VI）和氯的协同消毒是合适且可行的。这项研究的结果被认为为优化再生水消毒提供了有用的信息和替代方案。
