银离子-热力复合冲击消毒对生活热水管壁生物膜的控制作用

The Control Effect of Silver Ion-Thermal Energy Compound Impact Disinfection Technology on the Biofilm of the Domestic Hot Water System Pipeline Wall

针对建筑生活热水的生物安全性问题,对比研究了银离子、热力以及银离子-热力复合冲击消毒技术对生活热水管壁生物膜微生物的灭活效能.结果表明,银离子浓度和热水温度对管壁生物膜的细菌总数和总大肠菌群灭活效果影响显著,银离子浓度和热水温度越高,管壁生物膜的微生物灭活效果越好.银离子-热力复合消毒对管壁生物膜微生物灭活效果显著好于单一的银离子消毒或热力消毒;60℃热水、0.05mg/L银离子、消毒60min条件下的复合冲击消毒效果已接近单一的70℃热力冲击消毒效果,消毒后生物膜变薄或脱落,生物膜结构破坏明显.银离子-热复合冲击消毒显著,提高了建筑生活热水管壁生物膜微生物灭活效果,更高效地杀灭了病原微生物,是一种有应用价值的生活热水安全消毒和水质保障技术.

Aiming at biosafety problem in the domestic hot water system(DHWS),the inactivation efficiency of biofilm microorganisms on the living hot water pipeline wall by the disinfection methods of silver ion,thermal energy and silver ion-thermal energy compound impact disinfection technology was comparatively studied.The results show that,the concentration of silver ion and the temperature of the hot water have a significant influence on inactivation of the total number of bacteria and Escherichia coli of the biofilm on the DHWS pipeline wall.The effect of silver ion-thermal energy compound impact disinfection technology is better than that of single silver ion disinfection or thermal energy thermal energy significantly.The effect of compound impact disinfection technology with 60℃hot water,0.05 mg/L silver ions and 60 min of disinfection is close to single thermal energy disinfection technology of 70℃,but the disinfected biofilm becomes thin and shed,and biofilm structure is damaged significantly.And the silver ion-thermal energy compound impact disinfection technology can significantly improve the inactivation effect of biofilm microbes on the wall of DHWS pipeline and can kill the pathogenic microorganisms efficiently,which is a valuable technology for safety disinfection and water quality protection of DHWS.