摘要
试验研究了配水管网中常规水质指标随输水距离延长的变化规律以及与细菌再生长的相互关系。随着输水距离的增长,管网水中HPC明显升高,基本保持在104CFU/mL;管网水浊度有所升高,pH值变化较小;余氯量明显下降,水温越高,余氯量下降越快;小管径管道中余氯下降快,管壁生物膜是造成余氯消耗的主要因素。余氯量是控制管网水中悬浮菌再生长的主要常规水质指标,pH值、水温等对细菌再生长影响较小。
The changes of turbidity,pH,disinfectants residual and heterotrophic plate count （HPC） in drinking water distribution system were investigated. With the increase of hydraulic retention time,there was a litttle increase with the turbidity and almost no variation with the pH of drinking water. HPC increased greatly,which reached about 10^4 CFU/mL in the end of network. Chlorine residual decreased obviously, especially when water temperature was higher. Biofilm was the key factor caused chlorine consumption. In small diameter pipe, chlorine decreased more greatly than in big diameter pipe because of higher ratio of biofilm volume to water volume. It was chlorine residual other than pH,temperature that control bacterial regrowth in the network.
出处
《河北理工大学学报（自然科学版）》
CAS
2007年第3期126-129,共4页
Journal of Hebei Polytechnic University:Social Science Edition
基金
河北理工大学自然科学研究基金(200625)
关键词
配水管网
细菌再生长
HPC
余氯量
PH值
drinking water distribution system
bacterial regrowth
heterotrophic plate count （HPC）
chlorine residual
pH value
