Enhanced removal of organic matter and ammoniacal-nitrogen in a column experiment of tidal flow constructed wetland system

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Title: Enhanced removal of organic matter and ammoniacal-nitrogen in a column experiment of tidal flow constructed wetland system
Authors: Sun, Guangzhi
Zhao, Y.Q.
Allen, Stephen
Permanent link: http://hdl.handle.net/10197/3172
Date: 26-Jan-2005
Abstract: This study investigated the efficiency of a four-stage tidal flow constructed wetland system for the removal of organic matter and ammoniacal-nitrogen from diluted piggery wastewater. The results demonstrated that the operation of tidal flow enhanced the transfer of oxygen into wetland matrices. The overall oxygen consumption rate in the tidal flow system (357 gO2/m2∙d) was considerably higher than the rate obtainable in conventional wetlands. Most oxygen consumption (99%) was due to the decomposition of organic matter. The total supply of oxygen into the wetlands (473 gO2/m2∙d) exceeded the demand for the treatment. The percentage removal of BOD5 and NH4-N was improved by effluent recirculation at a ratio of 1:1. Immobilization by microbial cells and adsorption were found to be the main routes for the removal of ammoniacal-nitrogen. Significant nitrification could not take place under the treatment condition of the experiment.
Funding Details: Other funder
Type of material: Journal Article
Publisher: Elsevier
Copyright (published version): 2004 Elsevier B.V.
Keywords: Ammonia;Biofilm;BOD5;Reed bed;Wastewater treatment
Subject LCSH: Ammonia
Biofilms
Water--Purification--Organic compounds removal
Biochemical oxygen demand
Constructed wetlands
DOI: 10.1016/j.jbiotec.2004.08.009
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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