mdh.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Experiments to collect dimensioning data for production of biogas and ethanol from straw
Mälardalen University, School of Sustainable Development of Society and Technology.
2008 (English)Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesis
Abstract [en]

The term biofuel is referred to as liquid or gasous fuels for the transport sector that are produced from biomass. Producing biofuels from cellulose- rich materials are considered as relevant technology nowadays.

There is a research and technological development project for years at Malardalens Högskola about bioethanol and biogas production, and the university joined to the Vaxtkraft project in Vasteras, Sweden, aims to produce biogas out of ley crop and organic waste.

The purpose of my study was to analyse the efficiency of producing transportation fuels, spezifyed ethanol and biogas from straw.

Extraction of sugar from straw under different conditions with respect to pH, temperature and extraction time were studied. Thereafter biogasification with bacteria to form CH4 and ethanol fermentation with Saccharomyces was performed and the gas production measured.

The extractions were carried out separately at 121 °C and 140-145 °C, with 20, 40, 60, 120 minutes extraction time. The pH during the processes was set to 5 and 3 with buffer solution. To consider the extraction rate, the better conditions are lower pH, higher temperature and longer extraction time.

The results show the optimal extraction is performed at 140-145 °C for 120 minutes with pH 3.

The gasification was carried out at 37 °C with using Baker’s yeast. The results indicate that in contrast to the extraction, the gasification is better with the samples which extraction was carried out at lower temperature and higher pH. The best gasification was achieved by the samples with 121°C and pH 5 extraction irrespectively of the extraction time, although they had the worst extraction rate results.

More research and detailed quality analysis are needed to determine the reason of this seeming contradiction

Place, publisher, year, edition, pages
Akademin för hållbar samhälls- och teknikutveckling , 2008. , 52 p.
Keyword [en]
Ethanol, biogas, extraction, gasification
Identifiers
URN: urn:nbn:se:mdh:diva-778OAI: oai:DiVA.org:mdh-778DiVA: diva2:121412
Supervisors
Available from: 2008-06-19 Created: 2008-06-19

Open Access in DiVA

fulltext(1068 kB)1683 downloads
File information
File name FULLTEXT01.pdfFile size 1068 kBChecksum MD5
fffd0eab00bf1d02f9968fdb44af0d65bb0e33fd1fa9bfa9a2a2c2727ee436f034f0aa7e
Type fulltextMimetype application/pdf

By organisation
School of Sustainable Development of Society and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 1683 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 352 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf