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以前的全苏标准2874-54,适应了供水系统在结构上的工艺特点;新的全苏标准2874-73则在叙述标准要求时,突出了标准的意义,把饮用水的卫生标准看作是保健事业上一项重要的预防措施,并据此将标准条文划分为三组。饮用水细菌成份的正常指标,只列入了一般细菌的污染以及肠杆菌群的含量,把这两者当作水在流行病学上安全的间接指标。这两项指标依然保留了旧标准的数值。根据实验研究,肠杆菌的抵抗力比多种病原性微生物要强。例如,在自来水受到布氏杆菌污染用氯消毒时,大肠菌指数等于3是一个可靠的指标。肠杆菌对氯的抵抗力比钩端螺旋体菌属要强得多。肠杆菌、鼠伤寒沙门氏菌、肠炎沙门氏菌以及
The former Soviet Union Standard 2874-54, adapted to the structural characteristics of the water supply system features; the new Quan Su Standard 2874-73 in the description of the standard requirements, highlighting the significance of the standard, drinking water hygiene standards as An important precautionary measure in the health care industry, which divided the standard provisions into three groups. The normal indicator of the bacterial component of drinking water, which includes only general bacterial contamination and the content of enterobacteriaceae, serves as an indirect indicator of the epidemiological safety of water. The two indicators still retain the old standard values. According to experimental studies, Enterobacter resistance than a variety of pathogenic microorganisms stronger. For example, when tap water is contaminated with brucellosis and disinfected with chlorine, a coliform index of 3 is a reliable indicator. Enterobacter resistance to chlorine than Leptospira bacteria is much stronger. Enterobacter, Salmonella typhimurium, Salmonella enteritidis as well as