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首页> 外文期刊>Journal of Residuals Science & Technology >Assessment of Salmonella typhimurium growth in Class A biosolids and soil/biosolid mixtures
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Assessment of Salmonella typhimurium growth in Class A biosolids and soil/biosolid mixtures

机译：Assessment of Salmonella typhimurium growth in Class A biosolids and soil/biosolid mixtures

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摘要

The potential of Salmonella typhimurium regrowth in Class A biosolid pellets and compost after land application was assessed. Mixtures of soil, soil plus biosolids, and biosolids were inoculated with two different concentrations and monitored during a period of 20 days. No Salmonella growth occurred in any of the soil/biosolid mixtures regardless of inoculum size or moisture content. No growth occurred in any of the biosolids with a moisture content of 20 except the pellets from Texas when inoculated with 10,000 colony forming units/g. Growth of Salmonella did occur in all of the Class A products under saturated conditions. Under all moisture conditions indigenous microflora increased in numbers in the biosolids, soil and biosolid/soil mixtures. In conclusion, these results suggest that while regrowth of Salmonella in biosolids may occur under saturated conditions it does not occur after Class A biosolids land application at typical agronomic rates.

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