Microbial dynamics in ethanol fermentation from glycerol

Vikromvarasiri, Nunthaphan; Haosagul, Saowaluck; Boonyawanich, Siriorn; Pisutpaisal, Nipon

doi:10.1016/j.ijhydene.2016.04.188

Cited by 21 publications

(12 citation statements)

References 23 publications

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“…The term "glycerol" is generally applied to the crude product obtained from four different processes: microbial fermentation [135][136][137], soap manufacture [10,126,130], fatty ester production [129,137,138], and fatty acid production [139,140]. The by-product has impurities such as water, salts, esters, methanol, alcohol, and residual oils [129].…”

Section: Glycerolmentioning

confidence: 99%

An overview on the conversion of glycerol to value‐added industrial products via chemical and biochemical routes

Lima

Silva

Neto

et al. 2021

Biotech and App Biochem

100

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Glycerol is a common by-product of industrial biodiesel syntheses. Due to its properties, availability, and versatility, residual glycerol can be used as a raw material in the production of high value-added industrial inputs and outputs. In particular, products like hydrogen, propylene glycol, acrolein, epichlorohydrin, dioxalane and dioxane, glycerol carbonate, n-butanol, citric acid, ethanol, butanol, propionic acid, (mono-, di-, and triacylglycerols), cynamoil esters, glycerol acetate, benzoic acid, and other applications. In this context, the present study presents a critical evaluation of the innovative technologies based on the use of residual glycerol in different industries, including the pharmaceutical, textile, food, cosmetic, and energy sectors. Chemical and biochemical catalysts in the transformation of residual glycerol are explored, along with the factors to be considered regarding the choice of catalyst route used in the conversion process, aiming at improving the production of these industrial products.

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Section: Glycerolmentioning

confidence: 99%

An overview on the conversion of glycerol to value‐added industrial products via chemical and biochemical routes

Lima

Silva

Neto

et al. 2021

Biotech and App Biochem

100

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“…Outra limitação é o controle efetivo do pH, porém o uso de glicerol como fonte na obtenção de etanol reduziu os custos de produção em 40%. 15 A partir de um organismo único Escherichia coli SS1, produziram-se 0,57 mol de hidrogênio e 0,88 mol de etanol para cada mol de glicerol, simultaneamente. 16 Essa cepa microbiológica apresentou desempenho 50% maior do que outras cepas de referência, porém produziu dois combustíveis simultaneamente.…”

Section: Glicerolunclassified

Produção biotecnológica de produtos de valor agregado utilizando glicerol residual proveniente da síntese de biodiesel

Silva

Souza

Antero

2017

evid.

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ResumoO aumento significativo na produção de biodiesel por transesterificação de óleos comestíveis e não comestíveis causaram excedente de glicerol no mercado. Com suas características, estrutura química única, renovabilidade e biodisponibilidade, o glicerol tem promissor potencial para ser transformado em produtos químicos de alto valor agregado. Este artigo oferece uma análise abrangente e crítica do tratamento biotecnológico do glicerol a 1,3-propanodiol e 2,3-butanodiol. A conversão microbiana do glicerol apresenta vantagens em relação às sínteses químicas requerendo menor número de etapas, temperaturas medianas e pressão do ambiente, além de não gerar intermediários tóxicos.Palavras-chave: Micro-organismos. Biodiesel. Transesterificação. Fermentação de glicerol.

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“…Fermentation and decomposition are further reaction paths to treat the glycerol surplus. 15 In the fermentation process, glycerol is the raw material to obtain different alcohols like ethanol, 26,27 butanol 28,29 or propanediol. 26 Blends of butanol with diesel (with 8%, 10% and 24% by volume butanol 30 and with 10%, 16%, 20%, 25% and 40% by volume butanol) 31 and blends of ethanol with diesel 31 were tested, and in general, two main effects were observed: a reduction of soot, PM and CO emissions and an increase in THC emissions and fuel consumption.…”

Section: Introductionmentioning

confidence: 99%

Optimization of a diesel engine calibration for operating with a residual glycerol-derived biofuel

Lapuerta

Ramos

Rubio

et al. 2019

International Journal of Engine Research

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The new European directive for the promotion of renewable energy mandates an increase in the share of advanced and waste-based biofuels in the transport sector. In this study, an advanced glycerol-derived biofuel was used as a component of a ternary blend, denoted as o·bio®. This blend included 27.4 %v/v of fatty acid glycerol formal ester, 69.6 %v/v of fatty acid methyl ester and 3 %v/v of acetals obtained as a by-product of the fatty acid glycerol formal ester production process (which were proved to improve cold-flow properties). Finally, o·bio® was blended with diesel fuel at a content of 20 %v/v. Two operating conditions based on usual driving modes were selected, where the engine calibration could be re-optimized after the change of fuel, corresponding to vehicle velocities of 50 and 70 km/h. Since the main effect of the blend used is to reduce particulate matter emissions, exhaust gas recirculation was increased and injection was delayed, so that the initial benefits in particulate matter emissions could be re-distributed into benefits in both particulate matter and nitrogen oxides (NOx) emissions. From a combined analysis of the particulate matter–NOx trade-off and trying to limit the negative effect of delaying injection on fuel consumption, the final proposal was to set an additional 6% exhaust gas recirculation at 50 km/h and an additional 3% exhaust gas recirculation at 70 km/h, while delaying injection 2 °CA after top dead center at both vehicle operating conditions with respect to the original calibration. The use of the blend along with the optimization of the engine calibration is expected to reduce particulate matter and NOx emissions by around 50% with a vehicle speed condition of 50 km/h and to reduce particulate matter and NOx emissions by around 30% and 40% at 70 km/h with respect to diesel fuel emissions.

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Microbial dynamics in ethanol fermentation from glycerol

Cited by 21 publications

References 23 publications

An overview on the conversion of glycerol to value‐added industrial products via chemical and biochemical routes

An overview on the conversion of glycerol to value‐added industrial products via chemical and biochemical routes

Produção biotecnológica de produtos de valor agregado utilizando glicerol residual proveniente da síntese de biodiesel

Optimization of a diesel engine calibration for operating with a residual glycerol-derived biofuel

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