 Bioconversion of residual glycerol from biodiesel synthesis into 1,3-propanediol and ethanol by isolated bacteria from environmental consortiaDaniele Misturini Rossi, Janaína Berne da Costa, Elisangela Aquino de Souza, Maria do Carmo Ruaro Peralba and Marco Antônio Záchia Ayub Renewable Energy, 2012, vol. 39, issue 1, 223-227 Abstract: Residual (raw) glycerol originated from biodiesel synthesis is becoming of great environmental and economical concern due to its ever-growing surplus. In the present study, several bacterial strains were isolated and characterized for their ability to convert this raw glycerol into 1,3-propanediol (1,3-PD) and ethanol. The best producers of both 1,3-PD and ethanol were identified by 16S rDNA sequences to be Klebsiella pneumoniae and Pantoea agglomerans strains. Batch bioreactor cultivations under anaerobic and aerobic conditions were carried out in order to access the kinetics of glycerol consumption and product formation. Results showed that one isolated, K. pneumoniae BLh-1, was able to simultaneously produce up to 9.4 g/L of 1,3-PD with yields of 0.41 mol product mol−1 glycerol, and 6.1 g/L of ethanol with yields of 0.14 mol product mol−1 glycerol under anaerobic conditions, showing great potential for bioprocesses. Keywords: 1,3-Propanediol; Ethanol; Raw glycerol; Biodiesel; Bacteria consortium (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:39:y:2012:i:1:p:223-227 DOI: 10.1016/j.renene.2011.08.005 Access Statistics for this article Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides More articles in Renewable Energy from Elsevier |
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