REMOVAL OF COXSACKIE AND BACTERIAL-VIRUSES IN WATER BY FLOCCULATION .2. REMOVAL OF COXSACKIE AND BACTERIAL-VIRUSES AND THE NATIVE BACTERIA IN RAW OHIO RIVER WATER BY FLOCCULATION WITH ALUMINUM SULFATE AND FERRIC-CHLORIDE
REMOVAL OF COXSACKIE AND BACTERIAL-VIRUSES IN WATER BY FLOCCULATION .2. REMOVAL OF COXSACKIE AND BACTERIAL-VIRUSES AND THE NATIVE BACTERIA IN RAW OHIO RIVER WATER BY FLOCCULATION WITH ALUMINUM SULFATE AND FERRIC-CHLORIDE
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DOI：
10.2105/ajph.48.2.159
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发表时间：
1958-01-01
期刊：
影响因子：
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通讯作者：
KABLER, PW
中科院分区：
文献类型：
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作者：
CHANG, SL;STEVENSON, RE;KABLER, PW
在不同的条件下，在类似于水处理厂所采用的两阶段絮凝工艺中，研究了从俄亥俄州河水中去除添加的科萨基和细菌病毒、大肠杆菌和原生细菌的情况。使用25和15 ppm剂量的硫酸铝（44和26 ppm过滤明矾）进行第一阶段处理可将科萨基病毒减少99- 95%。在相同条件下，分别观察到细菌和细菌病毒的去除百分比略高和略低。在处理的第二阶段，FeCl 3表现出病毒去除效率与Al 2（SO 4）3相当，但细菌去除较差。在5[degree]和15[degree]C下，通过组合阶段去除科萨基病毒为99.6%，在25[degree]C下，在每个阶段中使用25 ppm的凝结剂为99.9%。在25[degree]C下，使用15 ppm混凝剂时，科萨基去除率为99.8%。在25[degree]C下，15-ppm和25-ppm剂量的天然细菌去除率分别为98-99%和99.99%，在5[degree]C和15[degree]C下，25-ppm剂量的天然细菌去除率约为99.99%。Ca ~（++）和Mg ~（++）的干扰效应和临界时间关系对病毒絮体复合物形成的影响的证据也被提出。
Re-movals of added Coxsackie and bacterial viruses, Escherichia coli, and native bacteria from Ohio River water were studied under varying conditions in a 2-stage flocculation process similar to those employed in water-treatment plants. First-stage treatment using aluminum sulfate at dosages of 25 and 15 ppm (44 and 26 ppm filter alum) reduced the Coxsackie virus by 99-95%. Slightly higher and slightly lower percentage removals of bacteria and bacterial virus, respectively, were noted under the same conditions. In the second stage of treatment, the FeCl3 showed a virus-removal efficiency comparable to Al2(SO4)3 but was poorer with respect to bacterial removal. Removal of Coxsackie virus by combined stages was 99.6% at 5[degree] and 15[degree]C and 99.9% at 25[degree]C by 25 ppm coagulant in each stage. With 15 ppm coagulant Coxsackie removal was 99.8% at 25[degree]C. Removal of native bacteria was 98-99% and 99.99% by 15- and 25-ppm dosages, respectively, at 25[degree]C, and about 99.99% by the 25-ppm dosage at 5[degree]C and 15[degree]C. Evidence of interference effects of Ca++ and Mg++ and critical time relationships on the virus-floc complex formation is also presented.