Payment P, Gamache F, Paquette G
Institut Armand-Frappier, Université du Québec, Laval, Canada.
Can J Microbiol. 1988 Dec;34(12):1304-9. doi: 10.1139/m88-228.
The microbial flora of the water produced by two water filtration plants and their drinking water distribution system were evaluated: the Pont-Viau (PV) and the Repentigny (RE) water filtration plants. Untreated water entering the plants contained 3.6 (PV) and 16.8 most probable number of infectious units (mpniu)/L (RE) enteric viruses and total coliform bacteria counts were 300,000 (PV) and 500,000 cfu/L (RE). Treated water leaving the plant was essentially free of all the bacterial indicators measured (total, stressed, and fecal coliforms; Aeromonas hydrophila; Pseudomonas aeruginosa; Clostridium perfringens; enterococci) as well as of human enteric viruses. Heterotrophic plate counts at 20 and 35 degrees C were low in the freshly treated water leaving the plants, but bacterial regrowth was observed in both distribution systems at all sampling sites. Average counts for the heterotrophic plate count (20 degrees C) were between 10(6) and 10(7) cfu/L and counts were clearly increased with the distance from the plant. The most numerous bacterial genera encountered were Bacillus, Flavobacterium, and Pseudomonas (nonaeruginosa).
庞特 - 维奥（PV）水过滤厂和勒庞蒂尼（RE）水过滤厂。进入工厂的未处理水中含有3.6（PV）和16.8最可能数感染单位（mpniu）/升（RE）的肠道病毒，总大肠菌群数分别为300,000（PV）和500,000 cfu/升（RE）。离开工厂的处理后水基本上不含所有检测的细菌指标（总大肠菌群、受胁迫大肠菌群和粪大肠菌群；嗜水气单胞菌；铜绿假单胞菌；产气荚膜梭菌；肠球菌）以及人类肠道病毒。离开工厂的新处理水中20℃和35℃下的异养平板计数较低，但在两个分配系统的所有采样点均观察到细菌再生长。异养平板计数（20℃）的平均计数在10⁶至10⁷ cfu/升之间，且计数明显随离工厂的距离增加而升高。遇到的数量最多的细菌属为芽孢杆菌属、黄杆菌属和假单胞菌属（非铜绿假单胞菌）。
