Crude glycerol by transesterification process from used cooking oils: Characterization and potentialities on hydrogen bioproduction

Autor(es)

Rodrigues, Caroline Varella ; Santana, Kamili Oliveira ; Nespeca, Maurilio Gustavo ; de Oliveira, Jose Eduardo ; Maintinguer, Sandra Imaculada

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 41, n. 33, p. 14641-14651, SEP 7 2016.
• Citações Web of Science: 11

Resumo

This study evaluated the potential bioconversion of crude glycerol from biodiesel production, applying used cooking oil for biohydrogen production by fermentative bacteria consortia. The pretreatment of crude glycerol was made by pH adjustment. Heat treatment of the inocula and initial pH 5.5 were applied to select hydrogen-producing bacteria and inactivate hydrogen-consumers microorganisms. The inocula tested were: (I) granular sludge from the thermophilic UASB reactor used on the treatment of vinasse and (II) granular sludge from the UASB reactor used on the treatment of sanitary sludge for the assays (1) and (2), respectively. The characterization of crude glycerol presented high levels of alkalinity, methanol and soap that may be inhibitory to biologic processes of H-2 production. The assays were carried in anaerobic batch reactors in order to verify the efficiencies of crude glycerol to H-2 generations by the microbial consortia (20%) at 37 degrees C, initial pH 5.5, with 20.0 g COD L-1 glycerol. The cumulative production of hydrogen for the assays (1) and (2) were, respectively, (mmol H-2 L-1) 28.49 +/- 1.55 and 19.14 +/- 1.67. The subsequent yields were obtained as follows: 2.2 moL H-2 mol(-1) glycerol and 1.1 moL H-2 mol(-1) glycerol, respectively. The used cooking oil was an efficient waste for bioconversion of crude glycerol to H-2 production. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 12/01318-1 - Produção biológica de gás hidrogênio em reator anaeróbio em batelada para concentrações reduzidas de substratos
• Beneficiário: Sandra Imaculada Maintinguer
• Modalidade de apoio: Auxílio à Pesquisa - Regular