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Effects of Different Pretreatments on Improving Biogas Production of Macroalgae Fucus Vesiculosus and Fucus Serratus in Baltic Sea
Halmstad University, School of Business, Engineering and Science. School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, China.ORCID iD: 0000-0002-5351-6962
Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).ORCID iD: 0000-0001-9157-7400
Halmstad University, School of Business, Engineering and Science. School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, China.
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, China.
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2019 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 33, no 3, p. 2278-2284Article in journal, Editorial material (Refereed) Published
Abstract [en]

Global warming along with energy demand and rising prices of natural energy resources have motivated studies to find some renewable and clean energy. The use of algae as the third-generation biofuel can avoid the competition for farmland, and algae can be considered as a potential future source of renewable energy. Algae can be used for biogas production through anaerobic digestion (AD). Fucus vesiculosus and Fucus serratus are the two dominating species of brown seaweed growing in the Baltic Sea in the southwest of Sweden. Pretreatment can significantly affect the biogas production because hydrolysis of the algae cell wall structure is a rate-limiting step in the AD process. In this study, four different pretreatments: mechanical, microwave (600 W, 2 min), ultrasonic (110 V, 15 min), and microwave combined with ultrasonic (600 W, 2 min; 110 V, 15 min) were applied to the seaweed and then codigested with a biogas plant leachate. The aim of this study was to investigate methane yields from AD after these pretreatments. The results showed that when compared with only mechanical pretreatment, the ultrasonic, ultrasonic combined with microwave, and microwave pretreatments could obtain increased cumulative methane yields of 167, 185, and 156%, respectively. The combined pretreatment showed a maximum methane yield of 260 mL/g·of volatile solids after 20 days of digestion. The ultrasonic combined with microwave pretreatment showed a significant improvement in methane yield when compared with the mechanical pretreatment. Copyright © 2019 American Chemical Society

Place, publisher, year, edition, pages
Washington, DC: American Chemical Society (ACS), 2019. Vol. 33, no 3, p. 2278-2284
Keywords [en]
Anaerobic-Digestion, Mechanical Pretreatment, Ultrasonic Pretreatment, Biomass, Waste, Biomethane, Seaweed, Energy, Solubilization, Microalgae
National Category
Bioenergy
Identifiers
URN: urn:nbn:se:hh:diva-40655DOI: 10.1021/acs.energyfuels.8b04224ISI: 000462260600060Scopus ID: 2-s2.0-85062887961OAI: oai:DiVA.org:hh-40655DiVA, id: diva2:1357698
Funder
Swedish Agency for Marine and Water Management
Note

Funder: National Natural Science Foundation of China (51508367)

Available from: 2019-10-04 Created: 2019-10-04 Last updated: 2019-10-07

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Mattsson, Marie

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