Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), Beijing Laboratory for Environmental Frontier Technologies, School of Environment, Tsinghua University, Beijing 100084, PR China.
Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), Beijing Laboratory for Environmental Frontier Technologies, School of Environment, Tsinghua University, Beijing 100084, PR China.
Sci Total Environ. 2022 Nov 20;848:157712. doi: 10.1016/j.scitotenv.2022.157712. Epub 2022 Jul 29.
Disinfection is essential for the microbial safety of reclaimed water. Traditional chlorine disinfection leads to secondary problems such as disinfection by-products and chlorine-resistant bacteria. Ferrate (Fe(VI)) is a novel green disinfectant. However, research on the disinfection characteristics of Fe(VI) remains insufficient. This study compared the disinfection efficacy between Fe(VI) and chlorine in secondary effluent, including the inactivation efficiency of coliforms and heterotrophic bacteria and the control effect on typical chlorine-resistant bacteria. The results showed that Fe(VI) was more effective than chlorine in inactivating Escherichia coli and total coliforms at low doses, whereas chlorine was more effective than Fe(VI) in inactivating heterotrophic bacteria. A severe trailing phenomenon was observed in Fe(VI) disinfection. Based on bacterial community structure analysis, Fe(VI) was also found to be capable of controlling the relative abundance of some chlorine-resistant bacteria such as Sphingomonas, Bacillus, Mycobacterium and Legionella except for Pseudomonas. The results of this study could have implications in evaluating Fe(VI) disinfection ability and optimizing Fe(VI) dosing for disinfection.
消毒对于再生水的微生物安全至关重要。传统的氯消毒会导致副产物和抗氯细菌等二次问题。高铁酸盐（Fe(VI)）是一种新型的绿色消毒剂。然而，Fe(VI)的消毒特性研究仍然不足。本研究比较了 Fe(VI)和氯在二级出水（包括大肠菌群和异养菌的灭活效率以及对典型抗氯菌的控制效果）中的消毒效果。结果表明，低剂量下 Fe(VI)比氯更有效地灭活大肠杆菌和总大肠菌群，而氯比 Fe(VI)更有效地灭活异养菌。Fe(VI)消毒中观察到严重的拖尾现象。基于细菌群落结构分析，Fe(VI)还被发现能够控制某些抗氯菌（如鞘氨醇单胞菌、芽孢杆菌、分枝杆菌和军团菌）的相对丰度，除了假单胞菌。本研究的结果可能对评估 Fe(VI)的消毒能力和优化 Fe(VI)的投加剂量以达到消毒效果具有重要意义。
