Data/hora: 24/06/2024 21:57:51

Biblioteca(s): 	Embrapa Agroenergia.	
Tipo da produção científica: 	Artigo em Periódico Indexado	
Circulação/Nível: 	A - 1	
Data corrente: 	19/10/2012	
Data da última atualização: 	21/09/2017	
Autoria: 	ALMEIDA, J. R. M. de; FAVARO, L. C. de L.; QUIRINO, B. F.	
Afiliação: 	JOAO RICARDO MOREIRA DE ALMEIDA, CNPAE; LEIA CECILIA DE LIMA FAVARO, CNPAE; BETANIA FERRAZ QUIRINO, CNPAE.	
Título: 	Biodiesel biorefinery: opportunities and challenges for microbial production of fuels and chemicals from glycerol waste.	
Ano de publicação: 	2012	
Fonte/Imprenta: 	Biotechnology for Biofuels, London, v. 5, n. 1, p. 48-64, 2012.	
DOI: 	10.1186/1754-6834-5-48	
Idioma: 	Inglês	
Conteúdo: 	The considerable increase in biodiesel production worldwide in the last 5 years resulted in a stoichiometric increased coproduction of crude glycerol. As an excess of crude glycerol has been produced, its value on market was reduced and it is becoming a “waste-stream” instead of a valuable “coproduct”. The development of biorefineries, i.e. production of chemicals and power integrated with conversion processes of biomass into biofuels, has been singled out as a way to achieve economically viable production chains, valorize residues and coproducts, and reduce industrial waste disposal. In this sense, several alternatives aimed at the use of crude glycerol to produce fuels and chemicals by microbial fermentation have been evaluated. This review summarizes different strategies employed to produce biofuels and chemicals (1,3-propanediol, 2,3-butanediol, ethanol, n-butanol, organic acids, polyols and others) by microbial fermentation of glycerol. Initially, the industrial use of each chemical is briefly presented; then we systematically summarize and discuss the different strategies to produce each chemical, including selection and genetic engineering of producers, and optimization of process conditions to improve yield and productivity. Finally, the impact of the developments obtained until now are placed in perspective and opportunities and challenges for using crude glycerol to the development of biodiesel-based biorefineries are considered. In conclusion, the microbial fermentation of glycerol represents a remarkable alternative to add value to the biodiesel production chain helping the development of biorefineries, which will allow this biofuel to be more competitive.	
Thesaurus Nal: 	biodiesel; biofuels; fermentation; glycerol; metabolic engineering.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Agroenergia (CNPAE)	
Exemplares: 	CNPAE - (1936-1) - UPC - AP - DD -  -  -  - DIS