Author, as appears in the article.: Caporgno M; Olkiewicz M; Torras C; Salvadó J; Clavero E; Bengoa C
Department: Enginyeria Química
URV's Author/s: Bengoa, Christophe José / CAPORGNO, MARTIN PABLO / OLKIEWICZ, MAGDALENA ANNA / Salvadó Rovira, Joan / Torras Font, Carles
Keywords: Ultrasonic pre-treatment Substrate to inoculum ratio (sir) Pre-treatment Phaeodactylum tricornutum Microalgae Methane Lipid extraction Co-digestion Biodiesel substrate to inoculum ratio (sir) phaeodactylum tricornutum methane lipid extraction co-digestion
Abstract: © 2016 Elsevier Ltd. Several characteristics make Phaeodactylum tricornutum potential candidate for biofuels production such as methane and biodiesel. For this reason, some alternatives are evaluated in this manuscript to improve the conversion of this microalgae into methane.One of these alternatives is the addition of sewage sludge to Phaeodactylum tricornutum for anaerobic co-digestion. Although the co-digestion resulted in lack of synergy, the absence of inhibition indicated that both substrates could be co-digested under certain circumstances, for example if microalgae are cultivated for wastewater treatment purposes.The extraction of lipids using organic solvents has been evaluated for biodiesel production but also as a pre-treatment for anaerobic digestion. The results revealed that the type of solvent influences lipid and biodiesel yields. The high polarity of the mixture methanol/hexane increased the lipid and the biodiesel yields from 10 ± 1 to 53 ± 2 gLipids/100 gVS and from 7 ± 1 to 11 ± 1 gBiodiesel/100 gVS compared with hexane. However, none of these solvents affected the composition of biodiesel. Regarding the methane production after the extraction, it yielded 257 ± 8 and 180 ± 6 mLCH4/gVS from lipid-extracted P. tricornutum using hexane and methanol/hexane respectively. The methane production from the raw microalga was 258 ± 5 mLCH4/gVS in the same experiment. The difference in methane production, mainly after the extraction with methanol/hexane, was a consequence of the changes in the composition of the microalgae after extraction. The extraction did not influence the biodegradability.The ultrasonic pre-treatment prior anaerobic digestion completely disrupted the microalgae cells, but the solubilisation of the organic fraction was scarce (<9.5%). The methane production from pre-treated samples was barely 10-11% higher than the obtained from non pre-treated samples, indicating that the refractory nature of the organic fraction in P. tricornutum is the main obstacle for the methane production.
Thematic Areas: Zootecnia / recursos pesqueiros Waste management and disposal Saúde coletiva Química Psicología Planejamento urbano e regional / demografia Medicine (miscellaneous) Medicina veterinaria Medicina ii Medicina i Materiais Matemática / probabilidade e estatística Management, monitoring, policy and law Interdisciplinar Geografía Geociências General medicine Farmacia Environmental sciences Environmental engineering Ensino Engenharias iii Engenharias ii Engenharias i Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Biotecnología Biodiversidade Astronomia / física Arquitetura e urbanismo Administração pública e de empresas, ciências contábeis e turismo
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 03014797
Author's mail: carles.torras@urv.cat christophe.bengoa@urv.cat joan.salvado@urv.cat
Author identifier: 0000-0002-3112-3519 0000-0001-9160-5010 0000-0003-2238-6082
Record's date: 2024-08-03
Papper version: info:eu-repo/semantics/acceptedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Journal Of Environmental Management. 177 240-246
APA: Caporgno M; Olkiewicz M; Torras C; Salvadó J; Clavero E; Bengoa C (2016). Effect of pre-treatments on the production of biofuels from Phaeodactylum tricornutum. Journal Of Environmental Management, 177(), 240-246. DOI: 10.1016/j.jenvman.2016.04.023
Entity: Universitat Rovira i Virgili
Journal publication year: 2016
Publication Type: Journal Publications
Repositori URV