The anaerobic digestion of the liquid residue (gelatinous water) coming from the production of fat from animal residue, was studied at laboratory and pilot scale. Biodegradability (>98%) and biogas potential (675 mL of biogas/g of CODapplied) of this wastewater are very high. However, due to the high content on nitrogen, an inhibition of the anaerobic activity was observed for quite low concentrations of N‐NH3. Dilution of the wastewater and pH regulation in the reactor around 7.3 are the 2 solutions which were investigated to overcome the nitrogen inhibition at industrial scale. These two solutions were validated at laboratory scale in an anaerobic SBR and then onsite at pilot scale in a continuous reactor. A stable anaerobic digestion was observed in both reactors showing that no nitrogen inhibition was obtained when N‐NH3 concentration in the reactor was kept low.
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Research Article|
June 01 2008
Anaerobic digestion of gelatinous water at laboratory and pilot scale and nitrogen inhibition
D. Martinez-Sosa
;
D. Martinez-Sosa
1
INRA, UR50, Laboratoire de Biotechnologie de l'Environnement, Avenue des Etangs, Narbonne F-11100, France2
Environmental Bioprocesses Departement, Institute of Engineering, National University of Mexico, Ap. Postal 70-472, 04510 México D.F., México
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Y. Rafrafi
;
Y. Rafrafi
1
INRA, UR50, Laboratoire de Biotechnologie de l'Environnement, Avenue des Etangs, Narbonne F-11100, France
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M. Torrijos
;
M. Torrijos
1
INRA, UR50, Laboratoire de Biotechnologie de l'Environnement, Avenue des Etangs, Narbonne F-11100, France
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N. Bernet
;
N. Bernet
1
INRA, UR50, Laboratoire de Biotechnologie de l'Environnement, Avenue des Etangs, Narbonne F-11100, France
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G. Buitron
;
G. Buitron
2
Environmental Bioprocesses Departement, Institute of Engineering, National University of Mexico, Ap. Postal 70-472, 04510 México D.F., México
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F. Bosque
;
F. Bosque
3
ITERG, 11, Rue Gaspard Monge, Parc industriel Bersol 2, Pessac F-33600, France
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J. P. Delgenès
J. P. Delgenès
1
INRA, UR50, Laboratoire de Biotechnologie de l'Environnement, Avenue des Etangs, Narbonne F-11100, France
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Water Sci Technol (2008) 57 (11): 1735-1741.
Citation
D. Martinez-Sosa, Y. Rafrafi, M. Torrijos, N. Bernet, G. Buitron, F. Bosque, J. P. Delgenès; Anaerobic digestion of gelatinous water at laboratory and pilot scale and nitrogen inhibition. Water Sci Technol 1 June 2008; 57 (11): 1735–1741. doi: https://doi.org/10.2166/wst.2008.091
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D. Martinez-Sosa, Y. Rafrafi, M. Torrijos, N. Bernet, G. Buitron, F. Bosque, J. P. Delgenès; Anaerobic digestion of gelatinous water at laboratory and pilot scale and nitrogen inhibition. Water Sci Technol 1 June 2008; 57 (11): 1735–1741. doi: https://doi.org/10.2166/wst.2008.091
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