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实验室试验表明,饮水中含自由性余氯0.2mg/L,可使再污染微生物灭活。其中f_2噬菌体的耐受力较大肠杆菌为强。结合性余氯对再污染微生物的灭活作用差,但可用加碘化钾法增效。浑浊度、温度、pH值与有机氮化物(甘氨酸)均对余氯的杀菌作用有所影响。 相似文献
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<正> 饮用水消毒为现代日常生活中必不可少的一项卫生措施。许多介水传播的传染病迄今尚未被彻底控制,因此各国对饮用水消毒的研究极为重视。现仅将化学消毒中的一些成果介绍于下。 相似文献
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我国北方与寒冷的西伯利亚大陆毗邻,全年气温较低。据有关资料介绍,东北、西北和华北的大部份地区每年约有一半时间处于寒冷的冬天(表1)。例如,黑龙江地区冬季最长,持续7个月之久;黄河流域虽然属于温带,但冬季日数也有5个月时间。当我们进行水质处理时,低温水消毒就是经常遇到的情况,也是需要认真研究的问题。 相似文献
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坑道内储水的防霉研究 总被引:1,自引:0,他引:1
早已听到北方寒区坑道内储水水面长霉的反映,直到1981年内蒙集宁驻军邀请我们去进行初步调查后,才了解到存在问题确实严重的真实情况。为三北地区的战备着想,这个问题必须加紧解决之。首先对内蒙固阳和集宁两个地区坑道的储水进行较全面的调查。共调查坑道内储水75个(固阳36个,集宁39个)两地水池实际储水量只分别占其容水量的60.7%和54.6%,储水 相似文献
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蒋兴锦 《解放军预防医学杂志》1986,(3)
迄今,在饮水消毒上尚未找到一种比氯更好的药剂,用氯消毒饮水虽有争议,但仍无取代者,继续在发展,并有久盛不衰之势。现就近年对氯消毒饮水中的几个主要研究问题,简介如下: 一、病毒的灭活迄今、世界各国已有几十次关于传染性甲型肝炎介水传播的报道,其它如病毒性胃肠炎和小儿麻痹症的介水传播报道亦多,尤其是引起胃肠炎的轮状病毒,在儿童中流行甚广。据联合国卫生组织调查,全球每年死于胃肠炎腹泻的幼儿约5×10~6例,受轮状病毒感染的占4 相似文献
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151 tap waters in 140 Chinese larger cities were investigated. In North China, under-ground waters were 47 out of 69; in South China, surface waters were 74 out of 82. Disinfection with liquid chlorine was the main treatment process (about 125 tap waters). In general, pollution of the raw waters in the South were higher than that in the North; in the surface waters were higher than that in the under-ground waters. It was the same with the amount of chlorine demand during chlorination. The average amount of chlorine added into the tap waters was 2.12mg/L, their average demand of chlorine was 1.43mg/L, and the average amount of residual chlorine was 0.68mg/L. The amount of chlorine demand during chlorination of the tap waters was markedly affected by the amount of NH+4(N), NO2- (N) or chemical oxygen demand in them, but not affected by the microorganisms in them. No sample of the tap waters contained more than 3/L coliform groups and 100/L bacterial total counts, when their residual chlorine was higher than 0.3mg/L. 相似文献
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