An alternative arrangement of gravel media in tidal flow reed beds treating pig farm wastewater

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Title: An alternative arrangement of gravel media in tidal flow reed beds treating pig farm wastewater
Authors: Sun, Guangzhi
Zhao, Y.Q.
Allen, Stephen
Permanent link: http://hdl.handle.net/10197/3179
Date: Jan-2007
Abstract: The effect of using coarse grain in the upper layer of a gravel-based reed bed is investigated. The aim for testing the “anti-sized” arrangement of gravel media is to seek a solution for the practical problem of medium clogging in reed beds that frequently takes place during the treatment of high strength wastewaters. Results from parallel operations of an anti-sized and a conventional “mono-sized” reed bed reveal that the former has the advantage of greater pollutant removal efficiencies. A specific clogging tendency rate is defined to quantitatively describe the clogging behaviour. Calculation of the clogging tendency rate reveals that the anti-sized reed bed has a clear advantage over the mono-sized bed because of improved ability to counteract clogging. Greater pore space in the upper layer of the anti-sized bed allows the suspended solids to be filtered and penetrate farther into the bed matrix, thereby allowing the solid-storage capacity of the matrix to be used more effectively and prolonging the operational life time of the bed. As such, the anti-sized arrangement of reed bed media may provide a viable solution for the problem of clogging.
Funding Details: Other funder
Type of material: Journal Article
Publisher: Springer
Copyright (published version): Springer Science + Business Media B.V. 2006
Keywords: CloggingConstructed wetlandGravelTidal flowWastewater treatment
Subject LCSH: Constructed wetlands
Animal waste
Organic wastes--Purification
DOI: 10.1007/s11270-006-9316-6
Language: en
Status of Item: Peer reviewed
Appears in Collections:Centre for Water Resources Research Collection
Urban Institute Ireland Research Collection
Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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