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Optimising the performance of a lab-scale tidal flow reed bed system treating agricultural wastewater
Date Issued
2004
Date Available
2011-10-21T16:05:54Z
Abstract
A gravel-based tidal flow reed bed system was operated with three different strategies in order to investigate its optimal performance for the treatment of high strength agricultural wastewaters. According to the three strategies, individual reed beds of the system were saturated and unsaturated with the wastewaters for different periods while steady hydraulic and organic loadings were maintained. Experiment results demonstrated that the system produced highest pollutant removal efficiencies with relatively short saturated period and long unsaturated period, highlighting the importance of O2 transfer into reed bed matrices during the treatment of high strength wastewaters. Significant removals of some major organic and inorganic pollutants were achieved with all the three operation strategies. Nitrification was not the major route of NH4-N removal when the system was under high organic loading. Due to the filtration of suspended solids and accumulation of biomass, gradual clogging of the reed bed matrices took place. The clogging caused concerns over the long-term efficiency of the current tidal flow reed bed system.
Sponsorship
Other funder
Other Sponsorship
EPSRC
Type of Material
Journal Article
Publisher
IWA Publishing
Journal
Water Science and Technology
Volume
50
Issue
8
Start Page
65
End Page
72
Copyright (Published Version)
IWA Publishing 2004
Subject – LCSH
Constructed wetlands
Animal waste
Organic wastes--Purification
Language
English
Status of Item
Peer reviewed
ISSN
0273-1223
This item is made available under a Creative Commons License
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