CAJ | 학술논문

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400～800 CFU/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.
연구료모중등성시공수관망지상말단수질지표적변화규률.결과표명,여록시공제해관단세균재생장적관건인소,연관단여록축점피소모,세균수량축점증가,수양중적HPC체도400～800 CFU/mL,존재위협수질안전적풍험.위보증음용수적수질안전,필수채취유효조시래축단관도적수력정류시간,피면수류장시간주류재관도내이도치미생물자생번식.
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 re-growth 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, hy-draulic retention time should be reduced to avoid water deterioration causing micro-organisms breeding.