Escherichia coli control in a surface flow treatment wetland
| Autor: | B. G. Warner, M. E. MacIntyre, Robin M. Slawson |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Microbiology (medical)
geography Lemna geography.geographical_feature_category Field experiment Public Health Environmental and Occupational Health Environmental engineering Wetland Biology biology.organism_classification medicine.disease_cause Zooplankton Infectious Diseases Water column medicine Sewage treatment Shading Waste Management and Disposal Escherichia coli Water Science and Technology |
| Zdroj: | Journal of Water and Health. 4:211-214 |
| ISSN: | 1996-7829 1477-8920 |
| Popis: | A field experiment showed that numbers of Escherichia coli declined significantly when floating Lemna spp. plants were removed to create open water areas in a typical newly constructed surface flow treatment wetland in southern Ontario. It is suggested that E. coli declined immediately after Lemna removal because the Lemna was shading the water column from penetration by natural UV radiation, it was providing favourable attachment sites for the E. coli, and it was not allowing effective free exchange of oxygen from surface winds to the water column to maintain high enough dissolved oxygen supplies for predator zooplankton populations. Operators of wetland systems must have the specialized skills required to recognize the cause and the appropriate maintenance requirements to maintain efficient operation of such unconventional systems should E. coli numbers increase during the course of operation. |
| Databáze: | OpenAIRE |
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