Publication: Treatment of a slaughterhouse wastewater: Effect of internal recycle rate on chemical oxygen demand, total Kjeldahl nitrogen and total phosphorus removal
2
Issued Date
2011-11-01
Resource Type
ISSN
1479487X
09593330
09593330
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2-s2.0-84857092559
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Mahidol University
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SCOPUS
Bibliographic Citation
Environmental Technology. Vol.32, No.15 (2011), 1755-1759
Suggested Citation
P. Fongsatitkul, D. G. Wareham, P. Elefsiniotis, P. Charoensuk Treatment of a slaughterhouse wastewater: Effect of internal recycle rate on chemical oxygen demand, total Kjeldahl nitrogen and total phosphorus removal. Environmental Technology. Vol.32, No.15 (2011), 1755-1759. doi:10.1080/09593330.2011.555421 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/11913
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Title
Treatment of a slaughterhouse wastewater: Effect of internal recycle rate on chemical oxygen demand, total Kjeldahl nitrogen and total phosphorus removal
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Abstract
This study investigated the ability of an anaerobic/anoxic/oxic (A 2 /O) system to treat a slaughterhouse wastewater. The system employed two identical continuous-flow reactors (10l total liquid volume each) running in parallel with the main operational variable, being the internal recycle (IR) rate. The chemical oxygen demand (COD), total Kjeldahl nitrogen (TKN) and total phosphorus (TP) performance was evaluated as the IR flowrate was increased from a Q of 15ld -1 to 4Q at a system hydraulic retention time of 16h and a solids retention time of 10d. The COD:TKN and COD:TP ratios were 8.2:1 and 54:1, which supported both nitrogen and phosphorus removal. For all IR multiples of Q, the COD removal was in excess of 90%. The TKN removal showed a modest improvement (a 4-5% increase, depending on the dissolved oxygen (DO)) as the IR doubled from Q to 2Q, but no further increase was observed at the 4Q IR rate. The TP removal reached its optimum (around 85%-89% (again depending on the DO)) at the 2Q rate. © 2011 Copyright Taylor and Francis Group, LLC.