Journal
JOURNAL OF ECOLOGICAL ENGINEERING
Volume 19, Issue 5, Pages 219-224Publisher
POLISH SOC ECOLOGICAL ENGINEERING-PTIE
DOI: 10.12911/22998993/89822
Keywords
pretreatment; lignocellulose; methane production; net energy efficiency
Categories
Funding
- National Centre for Research and Development [1/270745/2/NCBR/2015]
- project Research Coordination for a Low-Cost Biomethane Production at Small and Medium Scale Applications (Record Biomap) Horizon 2020 research and innovation programme [691911]
- University of Warmia and Mazury in Olsztyn, Poland [18.610.008-300]
- H2020 Societal Challenges Programme [691911] Funding Source: H2020 Societal Challenges Programme
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Disintegration of lignocellulosic biomass for energy purposes has been extensively studied. The study aimed to investigate the influence of crushed and uncrushed lignocellulosic biomass on the biogas production in an innovative reactor. The substrate fed to the reactor was Sida hermaphrodita silage mixed with cow manure. The bioreactor had an innovative design of the mixing cage system. The mixing system of the bioreactor consisted of two cylindrical stirrers in the form of a cage. The cages simultaneously rotate around the axis of the bioreactor at against their own axes. The bioreactor is currently presented under the Record Biomap program (Horizon 2020). The bioreactor was operated at organic compounds loading of 2 kg/(m(3).d) and 3 kg/(m(3).d) and hydraulic retention time was 50 d and 33 d, respectively. The biogas production under the organic compounds loading of 2 kg VS/(m(3).d) was 680 L/kg VS from crushed lignocellulosic biomass and 570 L/kg VS from uncrushed lignocellulosic biomass. The biogas production under the organic compounds loading 3 kg VS/(m(3).d) was 730 L/kg VS from crushed lignocellulosic biomass and 630 L/kg VS from uncrushed lignocellulosic biomass. The crushing of substrate did not influence the methane content in the biogas. In all experiments, the biogas comprised about 54% of methane. The net energy efficiency was calculated as well.
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