Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/36328
Registo completo
Campo DC | Valor | Idioma |
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dc.contributor.author | Lopes, Marlene | por |
dc.contributor.author | Alves, J. I. | por |
dc.contributor.author | Pereira, A. | por |
dc.contributor.author | Belo, Isabel | por |
dc.contributor.author | Sousa, D. Z. | por |
dc.contributor.author | Alves, M. M. | por |
dc.date.accessioned | 2015-07-22T11:56:02Z | - |
dc.date.available | 2015-07-22T11:56:02Z | - |
dc.date.issued | 2015-08-20 | - |
dc.identifier.issn | 0168-1656 | por |
dc.identifier.uri | https://hdl.handle.net/1822/36328 | - |
dc.description.abstract | H2 and CO2 are main compounds of synthesis gas. Efficient conversion of syngas to biomethane is a straightforward strategy to integrate the energy value of syngas into existing natural gas grid infrastructures. In this study, the effect of initial H2/CO2 (80/20, v/v) pressure on methane production rate and microbial community diversity was assessed in a hyperbaric bioreactor inoculated with anaerobic granular sludge. Several batch experiments were performed to distinguish between the effect of initial total gas pressure and H2/CO2 partial pressure: (1) varying initial gas pressure (from 1 to 6 bar) with 100% H2/CO2 mixture; (2) constant initial gas pressure (5 bar), with increasing H2/CO2 partial pressure (from 1 to 5 bar); (3) varying initial gas pressure (from 2 to 5 bar) with constant H2/CO2 partial pressure (2 bar). In (2) and (3), N2 was used for ensuring the necessary overpressure. Microbial community changes in the system were monitored by 16S rRNA-based techniques (PCR-DGGE). The raise of H2/CO2 initial pressure (100% H2/CO2) from 1 to 5 bar led to an improvement in methane rate production from 0.035 ± 0.014 mmol h1 to 0.072 ± 0.019 mmol h1. Similar methane production rates were observed in reactors operated at the same H2/CO2 partial pressures, even when varying the total initial gas pressure. Hydrogen partial pressure was shown to determine the structure of bacterial communities and diversity decreased with increasing H2/CO2 partial pressure. No significant changes were observed for the archaeal communities. | por |
dc.language.iso | eng | por |
dc.publisher | Elsevier B.V. | por |
dc.rights | openAccess | por |
dc.title | Hydrogenotrophic activity under increased H₂/CO₂ pressure: effect on methane production and microbial community | por |
dc.type | conferenceAbstract | - |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | http://www.elsevier.com/locate/issn/01681656 | por |
dc.comments | CEB22251 | por |
sdum.publicationstatus | published | por |
oaire.citationStartPage | S57 | por |
oaire.citationEndPage | S57 | por |
oaire.citationIssue | Suppl. | por |
oaire.citationConferencePlace | Netherlands | - |
oaire.citationTitle | Journal of Biotechnology | por |
oaire.citationVolume | 208 | por |
dc.date.updated | 2015-07-20T13:56:06Z | - |
dc.identifier.eissn | 0168-1656 | - |
dc.identifier.doi | 10.1016/j.jbiotec.2015.06.170 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Journal of Biotechnology | por |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_22251_1.pdf | 79,43 kB | Adobe PDF | Ver/Abrir |