摘要
研究了某中等城市供水管网枝状末端水质指标的变化规律。结果表明,余氯是控制该管段细菌再生长的关键因素,沿管段余氯逐渐被消耗,细菌数量逐渐增加,水样中的HPC达到400～800CFU/mL,存在威胁水质安全的风险。为保证饮用水的水质安全,必须采取有效措施来缩短管道的水力停留时间,避免水流长时间驻留在管道内而导致微生物滋生繁殖。
Changes of water quality in branch end of water distribution system were investigated in a middle-sized city. The results show that residual chlorine is the key factor to control the bacterial regrowth in the branch. Bacteria increase gradually with chlorine depletion in the distribution system,the HPC is 400 to 800 CFU/mL,and the water safety is threatened. In order to ensure the water safety,hydraulic retention time should be reduced to avoid water deterioration causing micro-organisms breeding.
出处
《中国给水排水》
CAS
CSCD
北大核心
2009年第23期55-56,60,共3页
China Water & Wastewater
关键词
供水管网枝状末端
水质指标
细菌再生长
branch end of water distribution system
water quality index
bacterial regrowth
