摘要
目的了解广东省管道直饮水系统的卫生状况。方法2004年4月制作统一调查表格,分别选择广州、深圳、珠海、东莞市的66、15、56、32套管道直饮水系统,对其选址与布局、净水机房卫生、水处理工艺和设备、供水与管网系统、水质检测与管理进行调查;采集直饮水的原水、出水、用户龙头水样,现场检测pH值、电导率、臭氧等指标,实验室检测COD、总有机碳(TOC)、重金属、细菌总数等16项指标。结果169套管道直饮水系统中采用反渗透、纳滤、超滤水处理设备的分别占74.40%,19.05%,6.55%,采用臭氧、紫外线、二氧化氯或臭氧和紫外线联合消毒分别占70.7%,14.7%,6.0%,8.6%。直饮水水质执行标准不统一,直饮水以每天循环2次居多,占45.8%,没有开展日检或周检验的直饮水系统达29%。直饮水中耗氧量、TOC等指标比原水显著下降(P<0.05),原水和直饮水TOC分别为2.23和0.23mg/L。用户龙头水的浊度、铅、细菌总数合格率分别为98.8%,99.4%,97.0%,铁、耗氧量等13个指标均合格。结论管道直饮水系统应选择适宜水处理工艺,加强水质常规检验和管理工作,其水质明显好于市政自来水。
Objective To know the quality of drinking water produced by deep treatment systems in Guangdong Province. Methods The unified investigation form was used, the water supply systems were selected from 4 cities,Guangzhou, Shenzhen, Zhuhai, Dongguan. pH value, conductivity, ozone, COD, TOC, heavy metals, bacteria were determined in 2004. Results Having investigated 169 systems, reverse osmosis, nanofihration and uhrafiltration equipment used to treat water accounted for 74.40%, 19.05% and 6.55 % respectively. The use of ozone disinfection was 70.7%. 45.8% of the systems, the water cycled twice per day, and 29%, no water quality test was conducted according to the regulation. The quality of water with deep treatment was satisfactory compared with the common tap water. Conclusion The quality of water produced by deep treatment systems is considered better than the common tap water and the applicable water treatment units should be selected, the routine water quality test and management should be conducted.
出处
《环境与健康杂志》
CAS
CSCD
北大核心
2009年第1期45-49,共5页
Journal of Environment and Health
基金
广东省自然科学基金资助项目(2003C33713)
关键词
水净化
管道直饮水系统
消毒
Water purification
Dual tube water supply
Disinfection
