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Anaerobic Codigestion of Sludge: Addition of Butcher’s Fat Waste as a Cosubstrate for Increasing Biogas Production
- Source :
- PLoS ONE, PLoS ONE, Vol 11, Iss 4, p e0153139 (2016), Digital.CSIC. Repositorio Institucional del CSIC, instname
- Publication Year :
- 2016
- Publisher :
- Public Library of Science, 2016.
-
Abstract
- Fat waste discarded from butcheries was used as a cosubstrate in the anaerobic codigestion of sewage sludge (SS). The process was evaluated under mesophilic and thermophilic conditions. The codigestion was successfully attained despite some inhibitory stages initially present that had their origin in the accumulation of volatile fatty acids (VFA) and adsorption of long-chain fatty acids (LCFA). The addition of a fat waste improved digestion stability and increased biogas yields thanks to the higher organic loading rate (OLR) applied to the reactors. However, thermophilic digestion was characterized by an effluent of poor quality and high VFA content. Results from spectroscopic analysis suggested the adsorption of lipid components onto the anaerobic biomass, thus disturbing the complete degradation of substrate during the treatment. The formation of fatty aggregates in the thermophilic reactor prevented process failure by avoiding the exposure of biomass to the toxic effect of high LCFA concentrations.<br />This work was financially supported by the Ministerio de Economía y Competitividad through the project CTQ2015-68925-R (http://www.mineco.gob.es/). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
- Subjects :
- Hot Temperature
lcsh:Medicine
Biomass
Sewage
Biogas
02 engineering and technology
010501 environmental sciences
01 natural sciences
Sludge
Biochemistry
Physical Chemistry
Waste Disposal, Fluid
Fats
Bioreactors
Spectroscopy, Fourier Transform Infrared
0202 electrical engineering, electronic engineering, information engineering
Bioenergy
Anaerobiosis
lcsh:Science
Multidisciplinary
Chemistry
Fatty Acids
Pulp and paper industry
Lipids
Refuse Disposal
Biodegradation, Environmental
Biofuel
Physical Sciences
Engineering and Technology
Sorption
Methane
Abattoirs
Mesophile
Research Article
Environmental Engineering
Materials by Structure
020209 energy
Materials Science
Fuels
Bioreactor
Animals
Humans
Meat-Packing Industry
Effluent
Materials by Attribute
0105 earth and related environmental sciences
business.industry
lcsh:R
Chemical Compounds
Biology and Life Sciences
Fatty Acids, Volatile
Dietary Fats
Energy and Power
Biofuels
lcsh:Q
Adsorption
business
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- PLoS ONE, PLoS ONE, Vol 11, Iss 4, p e0153139 (2016), Digital.CSIC. Repositorio Institucional del CSIC, instname
- Accession number :
- edsair.doi.dedup.....31dbb0636780daf10470b3bc144d069c