Enhancing methane production of Chlorella vulgaris via thermochemical pretreatments.

Autor: Mendez L; IMDEA Energy, Avda. Ramón de la Sagra 3, 28935 Móstoles, Madrid, Spain., Mahdy A, Timmers RA, Ballesteros M, González-Fernández C
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2013 Dec; Vol. 149, pp. 136-41. Date of Electronic Publication: 2013 Aug 31.
DOI: 10.1016/j.biortech.2013.08.136
Abstrakt: To enhance the anaerobic digestion of Chlorella vulgaris, thermochemical pretreatments were conducted. All pretreatments markedly improved solubilisation of carbohydrates. Thermal treatments and thermal treatments combined with alkali resulted in 5-fold increase of soluble carbohydrates while thermal treatment with acid addition enhanced by 7-fold. On the other hand, proteins were only solubilized with thermo-alkaline conditions applied. Likewise, all the pretreatments tested improved methane production. Highest anaerobic digestion was accomplished by thermal treatment at 120°C for 40 min without any chemical addition. As a matter of fact, hydrolysis constant rate was doubled under this condition. According to the energetic analysis, energy input was higher than the extra energy gain at the solid concentration employed. Nevertheless, higher biomass organic load pretreatment may be an option to achieve positive energetic balances.
(Copyright © 2013 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: