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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 12, No. 11, 2015, pp. 3479-3488
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Bioline Code: st15326
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 12, No. 11, 2015, pp. 3479-3488
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The effect of electron acceptors on biogas production from tannery sludge of a Mexican wastewater plant
Ruiz-Aguilar, G. M. L.; Lovanh, N.; Camarena-Aguilar, E. A.; Gomez-Luna, B. E.; Molina-Ochoa, J.; Alvarez-Villafaña, V. J. & Sosa, O.
Abstract
Effluents from the leather processing generally
are discharged into rivers or are used to irrigate farmland.
The biogas production from the digestion of sludge produced
could be used as alternative sources for energy and
power generation. A study was carried out to examine the
effects of various electron acceptor amendments on biogas
production from Mexican tannery sludge. Two bench scale
experiments were performed: The first experiment used
different electron acceptors (nitrate, iron and sulfate) and
three different levels for each variable (4.5, 9.0 and
13.5 mg/mL); in the second only urea was used as a nitrogen
source with three carbon/nitrogen ratios (6.0, 8.0
and 11). It was found that the reactors with nitrate as
electron acceptor (4.5 mg/mL) generated the most biogas
(200 mL of biogas accumulated in 25 days). Similarly, the
reactors with the lower ratio of carbon/nitrogen (6.0) produced
larger biogas production (131.50 ± 19.1 mL of
biogas) in a shorter period of time (9 days). The results also
showed that the addition of glucose did not significantly
influence the production of biogas.
Keywords
Anaerobic; Energy; Methane; Nutrient; Nitrogen
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