Effect of suspended particles in drinking water on microbial aggregation and disinfection
ZHANG Xin-xin1,2, GU Zheng1, YU Chao1, CHEN Guo-wei1, LIU Li1
1. Department of Civil Engineering, Hefei University of Technology, Hefei 230009, China; 2. Hefei Municipal Design and Research Institute Co. ,Hefei 230009, China
Abstract:Considering that the mechanism of disinfection-stressed protection effects of suspended particles on microbes remained unclear, this study investigated the chlorination-stressed protection effects of these particles on microbes in drinking water by analyzing microbial physiological characteristics and aggregation behaviors via a static experimental setup. The results showed that goethite dosage had a minor impact on the logarithmic inactivation rate on microbes in drinking water when the absence of chlorine. However, the presence of goethite stimulated microbial aggregation behaviors and the chlorine decay process, thus goethite playing a protective role when associating with chlorination stress, particularly at 0.5mg/L chlorine.
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