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Maize Silage as Substrate for Biogas Production

M. Hutňan

Published 2016 in Unknown venue

ABSTRACT

The presented work studies the possibilities of using maize silage for biogas production in laboratory as well as in full-scale conditions. From the results of long-term operation of a mixed laboratory anaerobic reactor, it follows that processing of maize silage as a single substrate is an unstable process due to the low alkalinity of silage that has to be compensated by pH adjustment. Specific production of biogas was 0.655 m3/kg of volatile solids. Start-up of a full-scale anaerobic reactor of a biogas plant with the volume of 2450 m3 takes approximately 100 days. At the end of the start-up, the biogas plant reached the designed parameters—maize silage dose 6–7 t/d of total solids, the reactor load about 2.5 kg/(m3/d) of volatile solids, the biogas production of 4200 m3/d, electricity production of ca. 6600 kWh/d, and heat production of ca. 11,500 kWh/d. Processing of co-substrates in a biogas plant revealed both positive and negative effect on the biogas plant operation, for example, the meat and bone meal addition had a negative effect on the operation due to its high nitrogen content. Loading of crude glycerol (12.1% of the total volatile solids added) showed a positive and stabilizing effect.

PUBLICATION RECORD

  • Publication year

    2016

  • Venue

    Unknown venue

  • Publication date

    2016-11-16

  • Fields of study

    Agricultural and Food Sciences, Chemistry, Environmental Science

  • Identifiers
    DOI 10.5772/64378
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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