Examination of the behaviour of Escherichia coli in biofilms established in laboratory-scale units receiving chlorinated and chloraminated water
| Autor: | Thomas E. Cloete, R. Kfir, Stephanus N. Venter, Maggy Ndombo Benteke Momba |
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| Rok vydání: | 1999 |
| Předmět: |
Chloramine
Environmental Engineering biology Ecological Modeling Biofilm Heterotroph chemistry.chemical_element biology.organism_classification medicine.disease_cause Pollution Enterobacteriaceae Microbiology chemistry.chemical_compound chemistry medicine Chlorine Water treatment Food science Waste Management and Disposal Escherichia coli Bacteria Water Science and Technology Civil and Structural Engineering |
| Zdroj: | Water Research. 33:2937-2940 |
| ISSN: | 0043-1354 |
| DOI: | 10.1016/s0043-1354(98)00520-x |
| Popis: | Groundwater was treated with chlorine and chloramine to study the incorporation and survival of Escherichia coli in developing biofilms in laboratory-scale units. Membrane filter and standard spread plate procedure were used to enumerate coliform and heterotrophic plate count bacteria respectively. Within 96 h the adhesion of heterotrophic plate count bacteria on stainless steel coupons was obvious in all systems, with a higher number of organisms (4 log cfu cm−2) noted for the non-disinfected water. Attachment of E. coli added 24 h after the formation of young biofilms was obvious on stainless steel coupons exposed to the non-disinfected water (9 cfu cm−2) and chlorinated water (2 cfu cm−2). A significant difference between E. coli counts in the non-disinfected water and chloraminated water, and the chlorinated and chloraminated water, was found. However, the ANOVA test indicated no significant difference in E. coli counts for the non-disinfected water and chlorinated water. This investigation revealed the effectiveness of chloramine in preventing the attachment of E. coli in developing biofilm. |
| Databáze: | OpenAIRE |
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