Survival of E. coli in soils of different ph and temperature
The survival of Escherichia coli (E. coli) in tropical soils of different pH and temperature was studied under saturated moisture content. Soils with pH 3,4, 5, 6, and 7 were inoculated with E. coli. Soil samples (pH 3 to 7) were incubated at 20°C and 30°C in triplicates for 21 days or until all bac...
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| Format: | Final Year Project Report / IMRAD |
| Language: | English |
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Universiti Malaysia Sarawak (UNIMAS)
2003
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| Online Access: | http://ir.unimas.my/id/eprint/18041/ http://ir.unimas.my/id/eprint/18041/3/Jong%20full.pdf |
| Summary: | The survival of Escherichia coli (E. coli) in tropical soils of different pH and temperature was studied under saturated moisture content. Soils with pH 3,4, 5, 6, and 7 were inoculated with E. coli. Soil samples (pH 3 to 7) were incubated at 20°C and 30°C in triplicates for 21 days or until all bacteria were undetectable. This study showed that decay rate of E. coli increased when the pH of soils decreased. This is no significant difference between decay rate in pH 6 and 7. E. coli survived best in pH 6 and 7. Linear decay model fit the data well in most cases. A relationship between decay rate, pH and temperature was developed. Results on this study indicate pH and temperature can effect survival of E. coli in tropical soils. Therefore, the effective management in the application and disposal of animal waste should be developed based on factors of pH and temperature. |
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