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采用建筑生活热水管道模拟实验系统,研究了银离子、银离子-紫外线联合消毒对微生物的灭活效能.结果表明,银离子投量对微生物灭活效能有显著影响,0.05mg/L银离子消毒60min时可达到极佳的微生物灭活效果.银离子投量较低时,增加消毒时间仍可达到相同的消毒效能.银离子的总大肠菌群灭活速率较低,需要保证足够的浓度和消毒时间(CT)值.银离子浓度的衰减速率慢,对生活热水生物膜微生物的高效持续消毒作用可保持48h以上.紫外线消毒、银离子消毒和银离子-紫外线联合消毒均可在很短的时间内对生物膜结构造成显著破坏,使生物膜出现脱落现象,其中紫外线消毒对生物膜结构的影响最小,银离子-紫外线联合消毒的影响最大.生物膜的16s r DNA测序分析表明,银离子消毒对病原微生物的灭活程度相对较低,紫外线消毒、银离子-紫外线联合消毒对病原微生物的灭活程度较高.银离子-紫外线联合消毒技术可充分发挥紫外线原位消毒和银离子持续消毒的特点,全面提高生活热水生物膜微生物消毒效能,是一种有应用价值的生活热水消毒和水质保障技术.
The inactivation efficiency of silver ion and silver ion-ultraviolet combined disinfection on microorganisms was studied by using simulation system of building hot water pipeline.The results showed that silver ion dosage had a significant effect on the inactivation efficiency of microorganisms, 0.05mg / L silver ion Disinfection 60min can achieve excellent microbial inactivation effect.When the silver ion dosage is low, increasing the disinfection time can still achieve the same disinfection efficiency of silver ion total coliforms inactivation rate is low, the need to ensure adequate concentration And disinfection time (CT) .The silver ion concentration decay rate is slow, efficient disinfection of living hot water biofilm microorganisms can continue for more than 48h.UV disinfection, silver ion disinfection and silver ion-UV disinfection can be very Biofilm structure was significantly damaged in a short period of time, which led to the phenomenon of biofilm shedding, of which the UV disinfection had the least effect on the biofilm structure and the silver ion-UV combination disinfection had the greatest impact. Silver ion disinfection of pathogenic microorganisms inactivation is relatively low, UV disinfection, silver ion - UV disinfection of pathogenic microorganisms inactivation process Higher.Union silver - UV disinfection technology can give full play to the characteristics of UV in-situ disinfection and continuous disinfection of silver ions to improve the life of hot water biofilm microbial disinfection efficiency, is an application value of domestic hot water disinfection and water quality protection technology.