Production of ethanol and arabitol by Debaryomyces nepalensis : influence of process parameters
TLDR
Debaryomyces nepalensis, osmotolerant yeast isolated from rotten apple, is known to utilize both hexoses and pentoses and produce industrially important metabolites like ethanol, xylitol and arabitol.Abstract:
Debaryomyces nepalensis, osmotolerant yeast isolated from rotten apple, is known to utilize both hexoses and pentoses and produce industrially important metabolites like ethanol, xylitol and arabitol. In the present study, the effect of different growth substrates, trace elements, nitrogen concentration and initial pH on growth and formation of ethanol and arabitol were examined. Optimum conditions for maximizing the product yields were established: glucose as carbon source, an initial pH of 6.0, 6 g/L of ammonium sulphate and addition of micronutrients. Under these best suited conditions, a concentration of 11g/L of arabitol and 19 g/L of ethanol was obtained in shake flask fermentations. The fermentation was scaled up to 2.5 L bioreactor and the influence of aeration, agitation and initial substrate concentration was also determined. Under optimal conditions (150 g/L glucose, 400 rpm and 0.5 vvm) ethanol concentration reached 52 g/L, which corresponds to a yield of 0.34 g/g and volumetric productivity of 0.28 g/L/h, whereas arabitol production reached a maximum of 14 g/L with a yield and volumetric productivity of 0.1 g/g and 0.07 g/L/h respectively.read more
Citations
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Utilizing yeasts for the conversion of renewable feedstocks to sugar alcohols - A review.
Anna Maria Erian,Michael Sauer +1 more
TL;DR: A review of the most recent studies on utilizing yeast for the conversion of renewable feedstocks to diverse sugar alcohols, including xylitol, erythritol, mannitol and arabitol, can be found in this paper.
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Microbial hosts for production of D-arabitol: Current state-of-art and future prospects
TL;DR: A detailed summary on strain improvement, where the scope of metabolic and genetic engineering methods to engender yeasts strains for improved arabitol production is highlighted as discussed by the authors , and the importance of understanding the metabolic pathway that regulates D-arabitol synthesis and its significant influence in optimizing the fermentation process is also briefly summarized.
Journal ArticleDOI
The Ability of a Novel Strain Scheffersomyces (Syn. Candida) shehatae Isolated from Rotten Wood to Produce Arabitol
Monika Kordowska-Wiater,Adam Kuzdraliński,Tomasz Czernecki,Zdzisław Targoński,Magdalena Frąc,Karolina Oszust +5 more
TL;DR: The new strain 20BM-3 isolated from rotten wood can be successfully used for arabitol production from abundantly available sugars found in plant biomass, and it is demonstrated that pH 4.0, 32°C, and a shaking frequency of 150 rpm were the optimum conditions for arbitol production by the investigated strain.
Journal ArticleDOI
The Improvement of Bioethanol Production by Pentose-Fermenting Yeasts Isolated from Herbal Preparations, the Gut of Dung Beetles, and Marula Wine.
TL;DR: Efficient conversion of pentose sugars to ethanol is important for an economically viable lignocellulosic bioethanol process and Meyerozyma caribbica-adapted strains were able to ferment L-arabinose to ethanol in the presence of 3 g/L acetic acid at 35°C.
Journal ArticleDOI
Isolation and characterization of malachite green-removing yeast from a traditional fermented fishery product
Nant Kay Thwe Moe,Nant Kay Thwe Moe,Pongtep Wilaipun,Kenta Yonezuka,Wakana Ishida,Hirona Yano,Takeshi Terahara,Chiaki Imada,Michiya Kamio,Takeshi Kobayashi +9 more
TL;DR: Results suggest that strain M3 removed MG and changed approximately 40% to LMG and 60 % to some metabolites other than LMG, which suggest that malachite green (MG)-degrading microorganisms were removed from fish farms and a traditional fermented fishery product in Myanmar and Thailand.
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