Effect of prefermentation on denitrifying phosphorus removal in slaughterhouse wastewater

An anaerobic–anoxic sequencing batch reactor (A 2 SBR) coupled with a fixed-bed nitrification reactor for simultaneous carbon, nitrogen and phosphorus removal was evaluated using slaughterhouse wastewater. Whereas the treatment could not be successfully carried out on the raw wastewater, the process...

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Bibliographic Details
Published in:Bioresource technology 2005-08, Vol.96 (12), p.1317-1322
Main Authors: Merzouki, M., Bernet, N., Delgenès, J.P., Benlemlih, M.
Format: Article
Language:English
Subjects:
Abattoirs
aerobic conditions
anaerobic conditions
anaerobic-anoxic sequencing batch reactors
Anaerobiosis
Anoxic phosphorus removal
Bacteria, Anaerobic
Biological and medical sciences
biological treatment
Biological treatment of waters
Bioreactors
Biotechnology
denitrification
enhanced biological phosphorus removal
Enhanced biological phosphorus removal (EBPR)
Environment and pollution
Fermentation
Fixed-bed nitrification
fixed-bed nitrification reactors
Fundamental and applied biological sciences. Psychology
Industrial applications and implications. Economical aspects
Life Sciences
Nitrogen - chemistry
Nitrogen - metabolism
Oxygen
phosphorus
Phosphorus - chemistry
Phosphorus - metabolism
Prefermentation
Sequencing batch reactor (SBR)
slaughterhouse wastes
Slaughterhouse wastewater
Time Factors
Volatile fatty acids (VFA)
Waste Disposal, Fluid - methods
wastewater
wastewater treatment
Water Pollutants
Water Purification - methods
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Summary:An anaerobic–anoxic sequencing batch reactor (A 2 SBR) coupled with a fixed-bed nitrification reactor for simultaneous carbon, nitrogen and phosphorus removal was evaluated using slaughterhouse wastewater. Whereas the treatment could not be successfully carried out on the raw wastewater, the process showed very good nutrient removal performances after prefermentation. The removals of COD, N-NH 4 and P-PO 4 achieved were 99%, 85% and 99%, respectively. The increase in volatile fatty acid (VFA) and phosphate concentrations in the effluent after prefermentation may explain the high levels of biological carbon, nitrogen and phosphorus removal observed. A simple prefermentation is, therefore, necessary but sufficient to ensure good performances of the denitrifying enhanced biological phosphorus removal (EBPR) process.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2004.11.017