Aulicino F A, Di Girolamo I, Mancini L
Istituto Superiore di Sanita', Sezione di Roma.
Boll Soc Ital Biol Sper. 1990 Jun;66(6):575-80.
This article presents the results of an investigation involving bacterioflora in a water well clogged for the presence of biomass. The water well, placed in a zone near Rome, showed some problems about the water quality and about the extraction of water. The examination of the interior of the pipes showed the presence of biomass. The biomass was examined microscopically and bacteriological analyses were carried out on it. Heterotrophic bacteria were enumerated with three different media by direct count, Pseudomonas sp., yeasts and fungi also by spread plate method. The anaerobic Sulphate Reducing Bacteria were investigated by "Most Probable Number" technique. The results of the analyses showed the presence of protozoa and algae. Moreover high quantity of bacterial flora as heterotrophic bacteria and Pseudomonas sp. were revealed. Sulphate Reducing Bacteria were enumerated in low quantities. Sphaerotilus natans, Actinomyces and Rhodotorula were identified. The clogging problems arose from the presence of filamentous microorganisms as Sphaeroilus natans and Actinomyces sp. When microorganisms of this kind are present in aquifers they can multiply massively if the conditions are favorable.
本文介绍了一项针对一口因生物质存在而堵塞的水井中细菌群落的调查结果。这口水井位于罗马附近的一个区域，在水质和取水方面存在一些问题。对管道内部的检查发现了生物质的存在。对生物质进行了显微镜检查并开展了细菌学分析。通过直接计数法用三种不同培养基对异养细菌进行计数，对假单胞菌属、酵母和真菌也采用平板涂布法进行计数。采用“最大可能数”技术对厌氧硫酸盐还原菌进行调查。分析结果显示存在原生动物和藻类。此外，还发现了大量作为异养细菌和假单胞菌属的细菌群落。硫酸盐还原菌数量较少。鉴定出了浮游球衣菌、放线菌和红酵母。堵塞问题是由丝状微生物如浮游球衣菌和放线菌属的存在引起的。当含水层中存在这类微生物时，如果条件适宜，它们会大量繁殖。
