Purification capacity of a highly loaded laboratory scale tidal flow reed bed system with effluent recirculation

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Title: Purification capacity of a highly loaded laboratory scale tidal flow reed bed system with effluent recirculation
Authors: Zhao, Y.Q.
Sun, Guangzhi
Allen, Stephen
Permanent link: http://hdl.handle.net/10197/3199
Date: 1-Sep-2004
Abstract: The purification capacity of a laboratory scale tidal flow reed bed system with final effluent recirculation at a ratio of 1:1 was investigated in this study. In particular, the four-stage reed bed system was heavily loaded with strong agricultural wastewater. Under the hydraulic and organic loading rates of 0.43 m3/m2.d and 1055 gCOD/m2.d, respectively, the average removal efficiencies obtained for COD, BOD5, SS, NH4-N and P were 77%, 78%, 66%, 62% and 38%, respectively. Even with the high loading rates, about 30% of NH4-N was converted into NO2-N and NO3-N from the mid-stage of the system where nitrification took place. The results suggest that the multi-stage reed bed system could be employed to treat strong wastewater under high loading, especially for the substantive mass removal of solids, organic matter and ammoniacal-nitrogen. Tidal flow combined with effluent recirculation is a favourable operation strategy to achieve this objective.
Funding Details: Other funder
Type of material: Journal Article
Publisher: Elsevier
Copyright (published version): 2004 Elsevier B.V.
Keywords: Agricultural wastewaterConstructed wetlandNitrificationRecirculationReed bedTidal flow
Subject LCSH: Agricultural wastes
Constructed wetlands
DOI: 10.1016/j.scitotenv.2004.03.002
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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