2,3-Butanediol

About: 2,3-Butanediol is a research topic. Over the lifetime, 299 publications have been published within this topic receiving 6016 citations. The topic is also known as: Pseudobutylene glycol & Dimethylene glycol.

Effect of lactic acid on growth and butanediol production by Klebsiella oxytoca

Abstract: Production of 2,3-butanediol byKlebsiella oxytoca was enhanced in the presence of low levels (<8 g/l) of added sodium lactate. Cell growth was inhibited, however, and essentially stopped above 15 g/l added lactate. Levels of by-products (acetic acid and ethanol) were also higher. With 3 g/l lactate and an initial glucose level of 98 g/l, butanediol concentration and productivity increased 164% with 98% utilization of glucose. With high glucose concentration (219 g/l), addition of 2.64 g/l lactate after the growth phase resulted in 81 g/l butanediol, with a productivity of 0.65 g/l/h and 71% glucose utilization.

Synthetic 2,3-Butanediol Pathway Integrated Using Tn7-tool and Powered Via Elimination of Sporulation and Acetate Production in Acetogen Biocatalyst

Abstract: Acetogen Clostridium sp. MT1802 originally producing 336-mM acetate from inorganic carbon of CO2/CO was engineered to eliminate acetate production and sporulation using Cre-lox66/lox71-approach. The recombinant started producing 105-mM formate expressing synthetic formate dehydrogenase integrated in two copies. Formate-producing recombinant was further engineered to express synthetic formate acetyltransferase, acetolactate synthase, acetolactate decarboxylase, and alcohol dehydrogenase integrated in two copies each using Tn7 tool. The resulted recombinant started producing 102-mM 2,3-butanediol (23BD). 23BD production was confirmed in five independent single step fermentation runs 25 days long each in five repeats using syngas blend 60 % CO and 40 % H2 (v/v) (p <0.005). 23BD production was 78 % if only CO2/H2 blend was fed instead of syngas (p <0.005). 23BD from CO2/H2 blend might serve as a commercial route to mitigate global warming in proportion to CO2 fermentation scale worldwide.

Optimization of fermentation condition for co-production of ethanol and 2,3-butanediol (2,3-BD) from hemicellolosic hydrolysates by Klebsiella oxytoca XF7

Abstract: Microbial production of ethanol and 2,3-butanediol (2,3-BD) from agro-residues has been attracting interest because of their applications in various industries, including generation of biofuel mole...

Liquid - Liquid Extraction of 2, 3-Butanediol from Fermentation Broth

Abstract: Recovery of metabolites from fermentation broth by solvent extraction can be used to optimize fermentation processes. End-product reutilization, low product concentration, large volumes of fermentation broth and the requirements for large bioreactors, in addition to the high cost largely contributed to the decline in fermentative 2, 3-butanediol production. Extraction can successfully be used for in-situ alcohol recovery in 2, 3-butanediol fermentations to increase the substrate conversion. In the present work organic extraction of 2, 3-butanediol produced by Klebsiella pneumoniae fermentation was studied to detect solvent effect on 2, 3-butanediol production and determination of efficient volume of solvent. The aim of this research was liquid-liquid extractive fermentation systems evaluation as an alternative to overcome the end product effect and to increase of 2, 3-butanediol production by K. pneumoniae because conventional fermentative production of 2, 3-butanediol by K. pneumoniae has the disadvantage of product reutilization by the organism. The highest 2, 3-butanediol production (23.01 g/L) achieved when 20% oleyl alcohol was used.