Denitrification potential and rates of complex carbon source from dairy effluents in activated sludge system

A predictive model for the denitrification performance of complex carbon sources was proposed based on compositional data. Potential and rates of denitrification of single dairy components (lactose, lactate, proteins, fat), as well as binary and complex (modelled “process water”) mixtures were asses...

Full description

Saved in:
Bibliographic Details
Published in:Water research (Oxford) 2006-08, Vol.40 (14), p.2747-2755
Main Authors: Sage, M., Daufin, G., Gésan-Guiziou, G.
Format: Article
Language:English
Subjects:
Activated sludge
Applied sciences
Carbon - metabolism
Carbon source
Dairy effluent
Dairy Products
Denitrification
Earth Sciences
Exact sciences and technology
Hydrology
Nitrogen - metabolism
Other industrial wastes. Sewage sludge
Pollution
Sciences of the Universe
Sewage
Wastes
Water treatment and pollution
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A predictive model for the denitrification performance of complex carbon sources was proposed based on compositional data. Potential and rates of denitrification of single dairy components (lactose, lactate, proteins, fat), as well as binary and complex (modelled “process water”) mixtures were assessed using test for nitrogen uptake rate (NUR). In all experiments, denitrification potential of mixtures was found to be significantly higher than the sum of individual potentials and denitrification rate with the readily biodegradable moiety of the mixtures was similar to the highest rate obtained with individual components (lactose or lactate). This work shows that activated sludge acclimated to dairy components can be modelled as a single biomass where the maximal anoxic growth rate of the biomass limits the denitrification rate with dairy components. As a consequence, lactose or lactate determine the maximal denitrification rate possible using dairy effluents.
ISSN:0043-1354
1879-2448
DOI:10.1016/j.watres.2006.04.005