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为研究饮用水系统的生物稳定性和微生物的控制策略,基于南方某市的实际给水管网,利用分子生物学方法对管壁生物膜中的3类变形细菌进行研究,探讨管壁生物膜特性和生物膜细菌数量与水中细菌再生长潜力(BRP)的相互关系.结果表明,随着管网水质的提高,以γ-变形细菌为主(所占比例分别为52.14%~77.34%、51.02%~77.45%、51.86%~65.99%)的变形细菌组成向以α-变形细菌为主(所占比例分别达62.56%~91.36%、75.27%~96.20%、73.08%~96.76%)的组成转变,致病威胁降低,生物稳定性得到提高.此外,管壁生物膜的脱落,使得管网水的营养物质浓度升高,促进细菌的再生长,其与BRP存在一定的相关性.
In order to study the biological stability of drinking water system and the control strategies of microorganisms, based on the actual water supply network in a southern city, three types of bacteria in the biofilm of the pipe wall were studied by using molecular biology method to investigate the biofilm characteristics And the relationship between the number of bacteria in the biofilm and the bacterial growth potential (BRP) in water were studied.The results showed that γ-degenerative bacteria were dominant with the increase of water quality (accounting for 52.14% -77.34%, 51.02% ~ 77.45%, 51.86% ~ 65.99%, respectively) to the composition of α-deformed bacteria (accounting for 62.56% -91.36%, 75.27% -96.20%, 73.08% -96.76%, respectively) Reduce the threat of disease and improve the biological stability.In addition, the wall biofilm shedding, making the concentration of nutrients in the pipe network water to promote bacterial regrowth, and BRP there is a certain correlation.