University of Jyväskylä | JYX Digital Repository

  • English  | Give feedback |
    • suomi
    • English
 
  • Login
JavaScript is disabled for your browser. Some features of this site may not work without it.
View Item 
  • JYX
  • Opinnäytteet
  • Pro gradu -tutkielmat
  • View Item
JYX > Opinnäytteet > Pro gradu -tutkielmat > View Item

Biogas production from ensiled maize with and without hydrothermal pretreatment

Thumbnail
View/Open
222.3Kb

Downloads:  
Show download detailsHide download details  
Authors
Koponen, Hanna
Date
2010
Discipline
Ympäristötiede ja -teknologiaEnvironmental science and technology

 
Energy crops are suitable substrates for anaerobic digestion. In the future their use will probably increase, and among other things optimum storage and pretreatment technologies should be developed. In this study eight maize silage varieties grown in Piikkiö, Southern Finland were used as substrates in anaerobic digestion. Also hydrothermal pretreatment was used to improve the biogas yield. Composition of the maize silage and the pretreated maize silage were analyzed and inhibitors were analyzed from the pretreated maize silage. The maize silages produce methane as much as fresh maizes in previous studies, when losses during the ensiling are taking into account and even 25-50 % more when losses were ignored. KXA7251 produced most methane per volatile solids analyzed before ensiling (VSoriginal) (408±7 l CH4/kgVS) and per cultivation area, whereas Amara produced most methane per volatile solids analyzed after ensiling (VSadded) (470±4 l CH4/kgVS). Howev-er, no variety jumps out when comparing the results of this study and the results of pre-vious studies for fresh maizes. The pretreated silages produce less methane than the un-treated silages, probably because of inhibition. Probable reasons for the inhibition were furans and carboxylic acids. More cellulose, insoluble lignin and ash were analyzed from the solid fraction of the pretreated silage than from the untreated silage, probably caused by hemicellulose degradation during the pretreatment. ...
Keywords
hydrothermal pretreatment inhibition maize silage biokaasu säilörehu maissi
URI

http://urn.fi/URN:NBN:fi:jyu-201101091009

Metadata
Show full item record
Collections
  • Pro gradu -tutkielmat [23442]

Related items

Showing items with similar title or keywords.

  • Biogas production from high-yielding energy crops in boreal conditions 

    Seppälä, Mari (University of Jyväskylä, 2013)
  • Biogas production from meat and pulp and paper industry by-products 

    Bayr, Suvi (University of Jyväskylä, 2014)
  • Effect of thermal pretreatment on chemical composition and biogas production from kitchen waste 

    Wordofa, Gossa (2014)
    Biogas has been well known with its wide range of benefits in terms of greenhouse reduction,energy security, creating jobs and generating revenue. However, biological conversion of several biogas feedstocks to biogas under ...
  • Methane and hydrogen production from crop biomass through anaerobic digestion 

    Pakarinen, Outi (University of Jyväskylä, 2011)
  • Biokaasua maissista : lajikkeen vaikutus energiasaantoon sekä maissin ja lehmän lietelannan yhteiskäsittely biokaasureaktorissa 

    Pyykkönen, Ville (2009)
  • Browse materials
  • Browse materials
  • Articles
  • Conferences and seminars
  • Electronic books
  • Historical maps
  • Journals
  • Tunes and musical notes
  • Photographs
  • Presentations and posters
  • Publication series
  • Research reports
  • Research data
  • Study materials
  • Theses

Browse

All of JYXCollection listBy Issue DateAuthorsSubjectsPublished inDepartmentDiscipline

My Account

Login

Statistics

View Usage Statistics
  • How to publish in JYX?
  • Self-archiving
  • Publish Your Thesis Online
  • Publishing Your Dissertation
  • Publication services

Open Science at the JYU
 
Data Protection Description

Accessibility Statement

Unless otherwise specified, publicly available JYX metadata (excluding abstracts) may be freely reused under the CC0 waiver.
Open Science Centre