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Enhancing biomethane production by integrating pyrolysis and anaerobic digestion processes
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.ORCID iD: 0000-0003-2661-1961
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.ORCID iD: 0000-0002-5014-3275
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.ORCID iD: 0000-0002-3485-5440
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.ORCID iD: 0000-0003-0300-0762
2017 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 204, 1074-1083 p.Article in journal (Refereed) Published
Abstract [en]

The anaerobic digestion of source-separated organic waste is a mature and increasingly used process for biomethane production. However, the efficient use of different fractions of waste is a big concern in anaerobic digestion plants. This study proposes the use of a new process configuration that couples the anaerobic digestion of biodegradable waste with the pyrolysis of lignocellulosic or green waste. The biochar obtained from pyrolysis was added to a digester as an adsorbent to increase the biomethane content and to support the development of a stable microbial community. In addition, the bio-oil and syngas produced by the pyrolysis process were reformed into syngas and then converted to biomethane via methanation. Modelling and simulations were performed for the proposed novel process. The results showed an approximately 1.2-fold increase in the biomethane volume produced. An overall efficiency of 67% was achieved, whereas the stand-alone anaerobic digestion system had an efficiency of only 52%. The results also indicated a high annual revenue for the integrated process compared to that for an alternative treatment (incineration) of green waste.

Place, publisher, year, edition, pages
2017. Vol. 204, 1074-1083 p.
Keyword [en]
Green waste, Municipal solid waste, Aspen Plus, Process simulation, Performance analysis, Economic analysis
National Category
Bioenergy
Identifiers
URN: urn:nbn:se:mdh:diva-37195DOI: 10.1016/j.apenergy.2017.05.006ISI: 000412866500084OAI: oai:DiVA.org:mdh-37195DiVA: diva2:1155207
Conference
8th International Conference on Applied Energy (ICAE), OCT 08-11, 2016, Beijing Inst Technol, Beijing, PEOPLES R CHINA
Available from: 2017-11-07 Created: 2017-11-07 Last updated: 2017-11-07Bibliographically approved

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Salman, Chaudhary AwaisSchwede, SebastianThorin, EvaYan, Jinyue

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