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Enhancing the production of biomethane: A comparison between GoBiGas process and new process of combining anaerobic digestion and biomass gasification
Mälardalen University, School of Business, Society and Engineering.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In recent years, there is a rapid growing interest in the use of biomethane for the transport sector. A new method of combining anaerobic digestion and biomass gasification is proposed.The feasibility study shows that more biomethane can be produced; resulting in an increase in the revenue compared to individual biogas plants. The GoBiGas project,which is initiated by Göteborg Energi, adopted another method based on gasification, water gas shift and methanation to enable biomethane production from forest residue. The aim of the present study is to investigate the economic viability of the new method when compared with the GoBiGas (Gothenburg Biomass Gasification) process.

For this study, a model of GoBiGas process was developed in Aspen Plus to perform the technical analysis, in which the overall efficiency and exergy efficiency were calculated at different moisture contents of biomass. For the economic analysis, the annual revenue was also estimated during the study. The results show that the overall efficiency of the new method is higher than the efficiency of the GoBiGas process and there is more production of biomethane from the new process.

Place, publisher, year, edition, pages
2016. , 78 p.
Keyword [en]
Aspen Plus, Biomethane, Biomass, Cold gas efficiency, GoBiGas process, Gasification, GoBiGas model
National Category
Engineering and Technology
URN: urn:nbn:se:mdh:diva-32249OAI: diva2:943812
Subject / course
Energy Engineering
2016-06-02, Beta, Mälardalens högskola, Västerås, 13:59 (English)
Available from: 2016-06-28 Created: 2016-06-28 Last updated: 2016-06-28Bibliographically approved

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Mehmood, Daheem
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