The survival of Escherichia coli, faecal coliforms and enterobacteriaceae in general in soil treated with sludge from wastewater treatment plants
The survival of Escherichia coli, faecal coliforms and enterobacteriaceae in general in soil treated with sludge from wastewater treatment plants
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DOI：
10.1016/j.biortech.2003.10.022
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发表时间：
2004-06-01
影响因子：
11.4
通讯作者：
Morán, A
中科院分区：
文献类型：
--
作者：
Estrada, IB;Aller, A;Morán, A
我们监测了处理污泥的应用对土壤中肠杆菌科细菌(主要是粪便大肠菌群，特别是大肠杆菌)行为的影响，并研究了它们在应用后随时间的演变。试验采用了三种不同的污泥：两种来自城市污水处理厂，其中一种经过厌氧消化和热干，另一种经过厌氧消化和机械脱水，另一种来自乳品废弃物处理，改为好氧消化和重力浓缩。进行了两种类型的试验：O型，露天，不能控制湿度或温度；L，在实验室条件下，控制温度和湿度。在未经筛选的土壤上也进行了污泥测试。经过80天的实验，在露天和实验室条件下，在土壤/污泥混合物上进行的化验中，粪便大肠菌群和大肠杆菌的数量已经显著减少或检测不到，但在同一时期，在含有化肥的混合物(硝酸铵钙)中，所研究的微生物数量却有相当大的增加。(C)2003爱思唯尔有限公司。保留所有权利。
We monitored the effect of the application of treated sludge on the behaviour of enterobacteriaceae (mainly faecal coliforms and especially Escherichia coli) in the soil, and studied their evolution over time after application. Three different sludges were used: two from a municipal sewage plant, one of them had been subjected to anaerobic digestion and heat drying, and the other to anaerobic digestion and mechanical dehydration, and one from a dairy waste treatment to aerobic digestion and gravity thickening.Two types of tests were carried out: type O, in the open air, with no possibility of controlling humidity or temperature; and type L, under laboratory conditions, with controlled temperature and humidity. Sludge tests were also run on unscreened soil previously treated with chemical fertilizer.After 80 days of experimentation the populations of faecal coliforms and E. coli had decreased considerably or were undetectable in assays carried out on the soil/sludge mixtures, under both open-air and laboratory conditions, but that, over the same period, in the mixtures containing chemical fertilizer (calcium ammonium nitrate) there had been a considerable increase in the microorganism populations studied. (C) 2003 Elsevier Ltd. All rights reserved.