Journal
CHEMICAL PAPERS
Volume 64, Issue 2, Pages 127-131Publisher
VERSITA
DOI: 10.2478/s11696-009-0108-5
Keywords
biogas; biomass; waste glycerin utilization; co-digestion; sugar beet pulp; corn silage; carrot residues; cheese whey
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The efficiency of anaerobic digestion process is dependent on the type and composition of the material to be digested. This work examines the co-digestion of corn silage, beet pulp silage, carrot residues, and cheese whey in different configurations together with a glycerin fraction - the waste product of transestrification of oils (biodiesel production) in a 25 L bioreactor operated mesophically in a quasi-continuous mode. Co-digestion of corn silage with carrot residues appeared to be more effective than that with cheese whey resulting in the gas production rate equal to 5.9 L L(-1) d(-1) and 1.4 L L(-1) d(-1), respectively. The performed experiments showed that a combination of three substrates: corn silage, cheese whey, and glycerin fraction resulted in the highest methane content equal to 61 % and the biogas production rate of 1.8 L L(-1) d(-1).
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