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The effect of flue gas explosive decompression pretreatment on methane recovery from bioethanol production waste
Estonian University of Life Sciences.ORCID iD: 0000-0003-1196-9522
Tallinn University of Technology, School of Engineering.
University of the Azores.
University of the Azores.
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2019 (English)In: Industrial crops and products (Print), ISSN 0926-6690, E-ISSN 1872-633X, Vol. 127, p. 66-72Article in journal (Refereed) Published
Sustainable development
According to the author(s), the content of this publication falls within the area of sustainable development.
Abstract [en]

Lignocellulosic biomass is an attractive feedstock for the production of liquid (eg. biofuel) or gaseous (eg. methane) fuels for the transportation sector. The bioethanol production process still produces a large quantity of production waste following the distillation process. Stillage consists mostly of lignin, hemicellulose, extractives, and yeast and therefore does not have any commercial value. The conversion of bioethanol production waste into gaseous biofuels like biogas or biomethane is a promising solution when it comes to transforming stillage into value-added products, enhancing the value of the biomass, and as a strategy for achieving zero-waste societies. This study aims to investigate the potential of bioethanol production waste for biomethane production. The results are compared with samples from different stages of the bioethanol production process. Milled barley straw (Hordeum vulgare) was used as a feedstock to produce energy in the form of methane, and the flue gas pre-treatment method (with and without bubbling) was applied. The results show that the methane production yield of bioethanol production waste, which has been pretreated with flue gas without bubbling is 5% higher than that of untreated substrate, and can achieve 94% of the methane production of fermented samples. Bioethanol production waste from substrates, which have been pretreated with flue gas with bubbling have a methane production level that is 29% higher than that of untreated materials. The results suggest that methane yields are influenced by the bubbling process. It is reasonable to use bioethanol production waste for the production of energy in the form of methane and to increase the energy output from the biomass.

Place, publisher, year, edition, pages
2019. Vol. 127, p. 66-72
National Category
Bioenergy
Research subject
Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-15917DOI: 10.1016/j.indcrop.2018.10.057ISI: 000452565200008Scopus ID: 2-s2.0-85055516486OAI: oai:DiVA.org:hb-15917DiVA, id: diva2:1300875
Available from: 2019-03-30 Created: 2019-03-30 Last updated: 2019-04-12Bibliographically approved

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