Determination of lab-scale biomethane potential of wheat straw pellets and their influence on anaerobic digestion
- Authors: Sabina Kolbl, Blaž Stres
- Citation: Acta hydrotechnica, vol. 26, no. 44, pp. 49-59, 2013.
- Abstract: Laboratory scale degradation of wheat straw pellets as an additional substrate for methane production was monitored as an example of controlled usage of unconventional substrates. In the laboratory biomethane potential of input feedstock from biogas plant (BGP) Organica Nova to which pellets were added in different proportions was determined. Organic loading (volatile solids, VS) was 5 g VS/L in all cases. Measurements were carried out by AMPTS I (Bioprocess Control, Sweden). Amount of produced methane was monitored and environmental conditions such as pH, TS, VS and temperature were measured.The coefficient of hydrolysis of straw pellets and mixture of straw pellets and substrate from BGP Organica Nova in anaerobic digestion process was determined. Mixture where straw pellets presented 10 % organic loading rate of substrate added to the reactor achieved the biomethane potential of 352 mL CH4/g VS. In the case of using only the substrate from the BPE Organica Nova the highest methane yield of 438 mL CH4/g VS was achieved.
- Keywords: anaerobic digestion, pellets, biomethane potential
- Full text: a44sk.pdf
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