Anaerobic co-digestion of pig manure and crude glycerol at mesophilic conditions: Biogas and digestate

Astals S, Nolla Ardevol V, Mata-Alvarez J (2012)
Bioresource Technology 110: 63-70.

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Crude glycerol derived from biodiesel production is characterized by its high concentration of organic carbon and its solubility in water; properties that make it a suitable co-substrate to improve the efficiency of a manure digester. An increase of about 400% in biogas production was obtained under mesophilic conditions when pig manure was co-digested with 4% of glycerol, on a wet-basis, compared to mono-digestion. The increase in biogas production was mainly a consequence of the increase in organic loading rate. However, the differences could also be related to the synergy between both substrates and the carbon-to-nitrogen ratio. Moreover, the analysis of the macro-compounds, protein, lipids, carbohydrates and fibers, showed lower removal efficiencies in the co-digester as the microorganisms obtained nutrients from the soluble carbohydrates provided by the glycerol. The digestate stability, evaluated through a respirometric assay, showed that co-substrate addition does not exert a negative impact on digestate quality. (C) 2012 Elsevier Ltd. All rights reserved.
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Astals S, Nolla Ardevol V, Mata-Alvarez J. Anaerobic co-digestion of pig manure and crude glycerol at mesophilic conditions: Biogas and digestate. Bioresource Technology. 2012;110:63-70.
Astals, S., Nolla Ardevol, V., & Mata-Alvarez, J. (2012). Anaerobic co-digestion of pig manure and crude glycerol at mesophilic conditions: Biogas and digestate. Bioresource Technology, 110, 63-70. doi:10.1016/j.biortech.2012.01.080
Astals, S., Nolla Ardevol, V., and Mata-Alvarez, J. (2012). Anaerobic co-digestion of pig manure and crude glycerol at mesophilic conditions: Biogas and digestate. Bioresource Technology 110, 63-70.
Astals, S., Nolla Ardevol, V., & Mata-Alvarez, J., 2012. Anaerobic co-digestion of pig manure and crude glycerol at mesophilic conditions: Biogas and digestate. Bioresource Technology, 110, p 63-70.
S. Astals, V. Nolla Ardevol, and J. Mata-Alvarez, “Anaerobic co-digestion of pig manure and crude glycerol at mesophilic conditions: Biogas and digestate”, Bioresource Technology, vol. 110, 2012, pp. 63-70.
Astals, S., Nolla Ardevol, V., Mata-Alvarez, J.: Anaerobic co-digestion of pig manure and crude glycerol at mesophilic conditions: Biogas and digestate. Bioresource Technology. 110, 63-70 (2012).
Astals, S., Nolla Ardevol, Vimac, and Mata-Alvarez, J. “Anaerobic co-digestion of pig manure and crude glycerol at mesophilic conditions: Biogas and digestate”. Bioresource Technology 110 (2012): 63-70.
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