Recent progress on transforming crude glycerol into high value chemicals: a critical review

Chozhavendhan, S.; Ramanujam, Praveen Kumar; Balasubramanian, Bharathiraja; Jayakumar, M.

doi:10.1080/17597269.2016.1174018

Cited by 30 publications

(26 citation statements)

References 65 publications

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“…Não há na literatura registro do metabolismo de glicerol para C. akabanensis. Por outro lado, há vários estudos de produção de glicerol por espécies do gênero Candida a partir de glicose 58,59 e outros estudos de utilização do glicerol por espécies do gênero Candida como única fonte de carbono. [60][61][62] Dessa forma, é inconclusiva a avaliação do comportamento esperado para C. akabanensis.…”

Section: Figura 2 Perfil Do Crescimento Celular Baseado Na Leitura Dunclassified

FERMENTAÇÃO ALCOÓLICA DE HIDROLISADO HEMICELULÓSICO DE TORTA DE GIRASSOL POR Galactomyces geotrichum UFVJM-R10 E Candida akabanensis UFVJM-R131

Matos¹,

Souza²,

Santos³

et al. 2017

Quim. Nova

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ALCOHOLIC FERMENTATION OF HEMICELLULOSIC HYDROLYZATE FROM SUNFLOWER CAKE BYGalactomyces geotrichum UFVJM-R10 AND Candida akabanensis UFVJM-R131. The use of the hemicellulosic fraction of plants for the production of second generation bioethanol depends on microorganisms capable to ferment pentoses. Two yeast strains habile to xylose fermenting in synthetic medium, Candida akabanensis UFVJM-R131 and Galactomyces geotrichum UFVJM-R10, not yet registered in the literature for the production of bioethanol, were evaluated here in the alcoholic fermentation of the hemicellulosic hydrolyzate from sunflower cake. The biomass hydrolysis was performed by 38 minutes at 120 °C / 1 atm with 6% H 2 SO 4 solution and solid / liquid ratio of 1:3.2. Chromatographic characterization of the hemicellulosic hydrolyzate showed the presence of glucose (7.57 g L ). Both yeasts were able to produce ethanol from the acid hydrolyzate from sunflower cake. The fermentation carried out with G. geotrichum UFVJM-R10 and C. akabanensis UFVJM-R131 presented Y P/S values of 0.29 and 0.27 g ethanol g -1 sugars , respectively. The amounts of the inhibitors identified in the hydrolyzate did not affect the efficiency of the alcoholic fermentation. The supplementation of the hydrolyzate with nitrogen and mineral sources increased the rate of consumption of xylose and arabinose.

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Section: Figura 2 Perfil Do Crescimento Celular Baseado Na Leitura Dunclassified

FERMENTAÇÃO ALCOÓLICA DE HIDROLISADO HEMICELULÓSICO DE TORTA DE GIRASSOL POR Galactomyces geotrichum UFVJM-R10 E Candida akabanensis UFVJM-R131

Matos¹,

Souza²,

Santos³

et al. 2017

Quim. Nova

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“…Glycerol rich phase in the middle layer was removed carefully from the separating funnel. [Chozhavendhan et al, 2016a].…”

Section: Stage 1 Purification Processmentioning

confidence: 99%

Production of ethanol by Zymomonas mobilis using partially purified glycerol

Chozhavendhan¹,

Kumar²,

Sivarathnakumar³

et al. 2017

JEES

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Glycerol obtained as a by-product from oleo chemical industries was effectively utilized as a substrate for the production of several value-added bio products such as acetic acid, citric acid, DHA, ethanol, etc. It has several advantages over commercial substrates which includes low cost nutrients, as a good carbon and energy source for the microorganisms to grow with high product conversion rate. The product formation was lowered due to the copious impurities present in the crude glycerol sample. The impurities present in the crude glycerolwere removed by two stage purification process. Purification process helps to increases the initial concentration of glycerol from 10 % (v/v). The resulting partially purified glycerol when used as a substrate produces 33.44 % (v/v) of ethanol with 27 % (v/v) concentration after simple distillation using Zymomonas mobilisat pH 6 and temperature 36 o C. The partially purified substrate and the product ethanol were validated by GC-MS and GC-FID.

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“…Crude glycerol composition depends on the industrial process used to produce biodiesel; however, methanol and soap are major contaminants commonly found in this by-product (Sivasankaran et al, 2016). Methanol is a toxic compound, even for ruminant animals, and its residues in crude glycerol destined for animal feed have not been sufficiently evaluated.…”

Section: Introductionmentioning

confidence: 99%

Determination of methanol residues in crude glycerol for animal feed by gas chromatography

Nazato

Romero

Abdalla

2019

Sci. agric. (Piracicaba, Braz.)

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Crude glycerol is a major by-product of biodiesel production and is an economical additive feed for ruminants. However, residual methanol in crude glycerol can be harmful to animal health. Several methods exist for quantifying methanol residues in biodiesel, yet few have been described that identify the methanol level in crude glycerol. We propose a method for determining the methanol level in crude glycerol destined for animal feed. Crude glycerol was extracted from the headspace and quantified by gas chromatography using a flame ionization detector (GC-FID). The method was linear up to 0.5 % of methanol. The limits of detection (LOD) and quantification (LOQ) were 0.015 and 0.031 %, respectively. No significant matrix effects were observed. Precision was 2 % at the 0.05 and 0.5 % levels. The average percentage of recovery was 90 %. Three analyzed samples of crude glycerol had methanol residues of 0.027-7.802 %. Furthermore, this methanol quantification method may be externally or internally calibrated using a GC manual injector. A reduction of at least 20 % in running time was obtained with good resolution between the peaks. Thus, this method can be applied to determine the methanol level in crude glycerol according to the upper limits for animal feed (5,000 ppm) and for human consumption (150 ppm). Finally, this method is useful for the quality control of crude glycerol intended for use in animal feed, enabling the alternative use of this by-product to add value to the biodiesel production chain.

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Recent progress on transforming crude glycerol into high value chemicals: a critical review

Cited by 30 publications

References 65 publications

FERMENTAÇÃO ALCOÓLICA DE HIDROLISADO HEMICELULÓSICO DE TORTA DE GIRASSOL POR Galactomyces geotrichum UFVJM-R10 E Candida akabanensis UFVJM-R131

FERMENTAÇÃO ALCOÓLICA DE HIDROLISADO HEMICELULÓSICO DE TORTA DE GIRASSOL POR Galactomyces geotrichum UFVJM-R10 E Candida akabanensis UFVJM-R131

Production of ethanol by Zymomonas mobilis using partially purified glycerol

Determination of methanol residues in crude glycerol for animal feed by gas chromatography

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