Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/6685
Título: Valorização de resíduos agro-industriais para a produção biológica de hidrogénio
Autor: Lopes, Sofia Helena Lewis
Orientador: Marques, Paula Alexandra Soares
Fragoso, Rita do Amaral
Palavras-chave: biohydrogen
Enterobacter aerogenes
dark fermentation
Jatropha curcas
seed cake
Data de Defesa: 2013
Editora: ISA
Citação: Lopes, S.H.L. - Valorização de resíduos agro-industriais para a produção biológica de hidrogénio. Lisboa: ISA, 2013, 68 p.
Resumo: Biohydrogen (bioH2) production through anaerobic fermentation has the advantage of the possibility to use waste as substrate becoming an attractive alternative from both economic and environmental viewpoint. In this study, it was developed a microbiological anaerobic process to produce hydrogen by a strain of bacterium Enterobacter aerogenes using as a substrate, Jatropha curcas seed cake. In this context, the effects of the application of a thermal pretreatment and the increase of residue initial concentration on the process yields were studied. Therefore, batch assays were performed using Jatropha curcas seed cake (2,5gVSsubstrate/Lfermentation medium) submitted to thermal treatment in an autoclave during 15 and 30 minutes and the results obtained were compared with the same when the substrate was added without pretreatment. The best results were obtained in absence of pretreatment (68,2mLH2/gVSsubstrate; 169mLH2/Lfermentation medium), while the 30 minutes exposure time at 121°C led to lower yields (60,0mLH2/gVSsubstrate; 149mLH2/Lfermentation medium), indicating inhibitory effects caused by the application of pretreatment. In the best established conditions, it was verified that the increase of the Jatropha curcas seed cake initial concentration from 2,5 to 10gVSsubstrate/Lfermentation medium led to a increase of bioH2 production volume of about 32%, although it was followed by a specific yield decrease from 68,2 to 23,5mLH2/gVSsubstrate. On the other hand, bioH2 production rate increased from 0,7 to 1mLH2/h.
Descrição: Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/6685
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

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