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The population structure of a peat filter bed system for treating domestic wastewater, and comparisons with conventional activated sludge

Bustos, A., Garcia, J., Colmenarejo, M.F., Borja, R. and Banks, C.J. (1997) The population structure of a peat filter bed system for treating domestic wastewater, and comparisons with conventional activated sludge Journal of Environmental Science and Health, Part A. Toxic/Hazardous Substances and Environmental Engineering, 32, (1), pp. 133-143. (doi:10.1080/10934529709376532).

Record type: Article

Abstract

The protozoan population growing in a peat filter bed located at an urban wastewater treatment plant ("La Cabrera”;, Madrid, Spain) was studied. A high density of microorganisms (2.7106 No./l) was found indicating a considerable biological activity. Comparing the mean characteristics of the protozoan population of a peat filter bed with that of a conventional activated-sludge pilot plant, it was found that 80% of the total population corresponded to free swimming ciliates in the first case, whilst sessile or fixed ciliates dominated in the activated-sludge system. These differences in population structure between purification systems could indicate, that the ciliate population in the peat bed did not reach an equilibrium phase, due to the relatively short operation time used in a pond (25-30 days), and was more similar to the transitional phase in an activated-sludge system. Paramecium sp. was found to be the predominant ciliate in the peat bed although a reasonably diverse population structure was found, which was indicative of aerobic conditions.

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More information

Published date: January 1997
Keywords: protozoan population, domestic wastewater, peat filter bed, conventional activated sludge

Identifiers

Local EPrints ID: 75506
URI: http://eprints.soton.ac.uk/id/eprint/75506
ISSN: 1093-4529
PURE UUID: 79b77e33-1f15-414a-b70c-b2c5ca00a143

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:42

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Contributors

Author: A. Bustos
Author: J. Garcia
Author: M.F. Colmenarejo
Author: R. Borja
Author: C.J. Banks

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