Document details

Biohythane production from marine macroalgae Sargassum sp. coupling dark fermentation and anaerobic digestion

Author(s): Costa, J. C. ; Oliveira, J. V. ; Pereira, M. A. ; Alves, M. M. ; Abreu, A. A.

Date: 2015

Persistent ID: http://hdl.handle.net/1822/35367

Origin: RepositóriUM - Universidade do Minho

Project/scholarship: info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F82000%2F2011/PT; info:eu-repo/grantAgreement/FCT/5876-PPCDTI/129146/PT ; info:eu-repo/grantAgreement/FCT/3599-PPCDT/132966/PT; info:eu-repo/grantAgreement/FCT/COMPETE/126270/PT; info:eu-repo/grantAgreement/FCT/5876-PPCDTI/126270/PT ; info:eu-repo/grantAgreement/FCT/COMPETE/129146/PT;

Subject(s): Biohythane; Marine Biomass; Sargassum sp; Biohydrogen; Anaerobic digestion; Caldicellulosiruptor sacharolyticus; Caldicellulosiruptor saccharolyticus; Ciências Naturais::Ciências Biológicas; Engenharia e Tecnologia::Biotecnologia Industrial; Ciências Naturais::Ciências Biológicas; Ciências Naturais::Ciências Biológicas; Engenharia e Tecnologia::Biotecnologia Industrial; Engenharia e Tecnologia::Biotecnologia Industrial; Science & Technology; Science & Technology; Science & Technology


Description

Potential biohythane production from Sargassum sp. was evaluated in a two stage process. In the first stage, hydrogen dark fermentation was performed by Caldicellulosiruptor saccharolyticus. Sargassum sp. concentrations (VS) of 2.5, 4.9 and 7.4 g L−1 and initial inoculum concentrations (CDW) of 0.04 and 0.09 g L−1 of C. saccharolyticus were used in substrate/inoculum ratios ranging from 28 to 123. The end products from hydrogen production process were subsequently used for biogas production. The highest hydrogen and methane production yields, 91.3 ± 3.3 L kg−1 and 541 ± 10 L kg−1, respectively, were achieved with 2.5 g L−1 of Sargassum sp. (VS) and 0.09 g L−1of inoculum (CDW). The biogas produced contained 14–20% of hydrogen. Potential energy production from Sargassum sp. in two stage process was estimated in 242 GJ ha−1 yr−1. A maximum energy supply of 600 EJ yr−1 could be obtained from the ocean potential area for macroalgae production. The highest hydrogen and methane production yields, 91.3±3.3 L kg-1 and 541±10 L kg-1, respectively, were achieved with 2.5 g L-1 of Sargassum sp. (VS) and 0.09 g L-1of inoculum (CDW). The biogas produced contained 14 to 20% of hydrogen. Potential energy production from Sargassum sp. in two stage process was estimated in 242 GJ ha-1yr-1. A maximum energy supply of 600 EJ yr-1 could be obtained from the ocean potential area for macroalgae production.

Document Type Journal article
Language English
Contributor(s) Costa, J. C.; Oliveira, J. V.; Pereira, M. A.; Alves, M. M.; Abreu, A. A.
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