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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
energy
Enhanced methane production of Chlorella vulgaris and Chlamydomonas reinhardtii by hydrolytic enzymes addition
Energy Conversion and Management, Volume 85, Year 2014
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Description
The effect of enzymatic hydrolysis on microalgae organic matter solubilisation and methane production was investigated in this study. Even though both biomasses, Chlamydomonas reinhardtii and Chlorella vulgaris, exhibited similar macromolecular distribution, their cell wall composition provided different behaviors. The addition of carbohydrolase (Viscozyme) and protease (Alcalase) resulted in high carbohydrates and protein solubilisation on both biomasses (86-96%). Despite the high carbohydrate solubilisation with the carbohydrolase, methane production was enhanced by 14% for C. vulgaris, while hydrolyzed C. reinhardtii did not show any improvement. The addition of protease to C. reinhardtii increased methane production by 1.17-fold. The low enhancement achieved together with the inherent high biodegradability of this biomass would not justify the cost associated to the enzyme addition. On the other hand, C. vulgaris hydrolyzed with the protease resulted in 86% anaerobic biodegradability compared to 54% of the raw biomass. Therefore, the application of protease prior anaerobic digestion of C. vulgaris could be a promising approach to decrease the energetic input required for cell wall disruption. © 2014 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Mahdy, Ahmed
Spain, Mostoles
Instituto Imdea Energía
Egypt, Zagazig
Faculty of Agriculture
Méndez, Lara
Spain, Mostoles
Instituto Imdea Energía
Ballesteros Perdices, Mercedes
Spain, Mostoles
Instituto Imdea Energía
Spain, Madrid
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
González-Fernández, Cristina
Spain, Mostoles
Instituto Imdea Energía
Statistics
Citations: 113
Authors: 4
Affiliations: 3
Identifiers
Doi:
10.1016/j.enconman.2014.04.097
ISSN:
01968904