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Two strategies for improving animal farm wastewater treatment in reed beds
Author(s)
Date Issued
2010-09
Date Available
2011-08-29T10:14:21Z
Abstract
In this study, dewatered alum sludge cakes were used as substrate in a laboratory
scale tidal vertical flow reed bed system treating animal farm wastewater. The
“tidal flow” operation was employed to enhance oxygen transfer into the reed bed
system, while dewatered alum sludge cake was used to enhance phosphorus (P)
removal in the system through ligand exchange. Except for the removal of P
which was consistently high throughout the experiment, the removal of organics
(BOD5, COD) exhibited a trend of gradual and increasing removal. This
highlights the obvious advantage of the use of the dewatered alum sludge cake in
the reed bed. For the removal of organics, a mean removal percentage of
82.3 ± 3.5 % was obtained for BOD5 at an average loading of 84.6 g/m2.d. In
addition, the first-order kinetics constant for BOD5 removal (KBOD, m/d) obtained
in the system was about 9 times the rate constant commonly obtained in
conventional horizontal flow systems. The mean level of dissolved aluminium
(Al) monitored in the effluent was 0.04 ± 0.01 mg/l and this is well below the
discharge limit of 0.2 mg/l for Al discharge into all waters.
Sponsorship
Other funder
Other Sponsorship
Environmental Protection Agency
Type of Material
Journal Article
Publisher
Taylor & Francis
Journal
Environmental Technology
Volume
31
Issue
12
Start Page
1343
End Page
1348
Copyright (Published Version)
2010 Taylor & Francis
Subject – LCSH
Water treatment plant residuals
Agricultural wastes
Constructed wetlands
Phosphorus
Web versions
Language
English
Status of Item
Peer reviewed
ISSN
0959-3330 print
1479-487X online
This item is made available under a Creative Commons License
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