Bacterial adaptation and performance of household biosand water filters in differing temperatures
| Autor: | N. Arnold, Allen W. Archer, Brian D. Barkdoll |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
business.industry
Drop (liquid) 0208 environmental biotechnology Environmental engineering Sewage 02 engineering and technology 010501 environmental sciences Biology Pulp and paper industry 01 natural sciences 020801 environmental engineering Total coliform Biosand filter Water treatment business Effluent Surface water 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Water Supply. 16:794-801 |
| ISSN: | 1607-0798 1606-9749 |
| Popis: | The household biosand filter (BSF) is a highly utilized point-of-use water treatment tool. The effect of ambient temperature on the ability of the BSF to remove microbes from water is unclear. Model filters were distributed among different temperature-controlled laboratories and dosed daily with surface water amended with sewage. Comparison of the total coliform and Escherichia coli counts in the influent versus effluent revealed an immediate drop in the removal efficiencies of filters held in colder rooms. This performance difference, however, became less pronounced over the course of the experiment until no significant performance difference was detected between filters regardless of their ambient temperature, perhaps due to microbial adaptation within the BSFs. Subsequently, two-thirds of the filters were exposed to freezing temperatures, thawed, and re-tested for microbial removal. All filters exposed to freezing temperatures showed significant drops in microbial removal compared to control filters. Filters exposed to the most extreme temperatures showed the greatest drop in performance. |
| Databáze: | OpenAIRE |
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