摘要
配水管网中细菌繁殖是钦用水二次污染的重要方面.为此,对中国南方某市市区配水管网中总余氯、总磷、可同化有机碳(AOC)和细菌总数等饮用水微生物学水质相关指标进行了研究.结果表明:余氯在配水管网的沿程上有明显的衰减过程,而且与细菌总数有很好的相关关系;细菌总数测定时间的研究结果均表现为72h>48h>24h,86.700的水样在培养24h后没有菌落形成,48h后4000的水样没有菌落形成.所有水样在培养48h后未表现超标,但培养72h后有12.500的水样细菌总数超标,即菌落数>100cfu/mL;细菌总数与总磷有较好的相关关系,总磷含量较高时细菌总数也较高;AOC在管网中浓度呈上升趋势,并与细菌总数有较好的相关关系,随管网的延伸AOC浓度的增加有减缓的趋势.总的来说该市饮用水水质较好,基本处于生物稳定性状态.
Bacteria regrowth in distribution system is an important factor for drinking water pollution.Research was made on the parameters such as total chlorine, total phosphorus (TP), assimilable organic carbon(AOC), heterotrophic plant count(HPC), etc. in a southern city of China. The results showed that total chlorine decayed distinctively with distance from water treatment plant, and it had a good correlation with HPC. The results of HPC indicated that it increased with the elongation of culture time. In the tested samples, no clone was found in 86.700 of the samples with 24 h cultivation, and 4000 of the samples with 48 h cultivation. 12.500 of the samples were found to have more than 100 cfu/mL HPC after 72 h cultivation. HPC had a good correlation with total phosphorus. High level of total phosphorus resulted in a high level of HPC. From water treatment plant to the entrance of the residential area, the concentration of AOC showed an increase along pipe running and a good correlation with HPC, but the increasing trend of AOC tended to be slower. The water quality of the city is well and can remain biological stabilization.
出处
《天津大学学报(自然科学与工程技术版)》
EI
CAS
CSCD
北大核心
2005年第5期411-415,共5页
Journal of Tianjin University:Science and Technology
基金
"十五"重大科技专项资助项目(2002AA601120)
天津市科技发展计划资助项目(033113111)
关键词
饮用水
微生物学水质
配水管网
生物稳定性
drinking water
bacteriological water quality
distribution system
biological stabilization