Abstract:
The present invention relates to a method for preparing a diol compound from glycerol using a variant strain, and more specifically to a method for producing 1,3-propanediol and 2,3-butanediol at a high yield by using a variant of a microorganism capable of fermenting glycerol that lacks a gene for coding lactate dehydrogenase. According to the present invention, the production amount of 1,3-propanediol and 2,3-butanediol can be significantly improved through a novel culturing method of a glycerol fermentation microorganism variant.
Abstract:
The present invention relates to a mutant microorganism having enhanced capacity for generating ethanol using glycerol or crude glycerol as a carbon source, and to a method for producing ethanol using same. More particularly, the present invention relates to a mutant microorganism having high ethanol generation ability from glycerol or crude glycerol, wherein the enzymatic activity of alcohol dehydrogenase (AdhII) is increased and the enzymatic activity of 1,3-propanediol oxidoreductase (DhaT) is decreased in the mutant organism. The present invention also relates to a microorganism improved by means of the aforementioned mutation, and to a method for producing ethanol using the mutant microorganism.
Abstract:
The present invention relates to a method for preparing a diol compound from glycerol using a variant strain, and more specifically to a method for producing 1,3-propanediol and 2,3-butanediol at a high yield by using a variant of a microorganism capable of fermenting glycerol that lacks a gene for coding lactate dehydrogenase. According to the present invention, the production amount of 1,3-propanediol and 2,3-butanediol can be significantly improved through a novel culturing method of a glycerol fermentation microorganism variant.
Abstract:
The present invention relates to novel thraustochytrid-based microalgae capable of producing bio-oil, and a method for preparing bio-oil by using the same. The microalgae according to the present invention can produce bio-oil at a high yield by accumulating bio-oil in strains at a high ratio when cultured in a medium containing glucose and can produce bio-oil by using a bean powder as a nitrogen source, and a cultured product can be used as a material for preparing food and feed by using an edible bean powder as a medium. In addition, the microalgae according to the present invention can produce bio-oil by using non-edible fibrous biomass as a carbon source, and it is possible to overcome the limits of the development of biofuel such as a food resource supply and demand imbalance, price increase of raw materials and the like and to ensure industrial competitiveness of microbial fermented oils by using non-edible fibrous biomass as a medium.
Abstract:
The present invention relates to a microbial mutant in which the gene encoding transcription activator or the gene encoding dihydroxyacetone kinase in a microorganism having the ability to produce 1,3 -propanediol using glycerol as a carbon source is deleted or inactivated and to a method for producing 1,3- propanediol using the mutant. When the mutant according to the present invention is used, the production of byproducts which are inevitably obtained when producing 1,3 -propanediol from glycerol using prior strains can be minimized, and thus the cost of purification of 1,3-propandiol can be reduced.
Abstract:
The present invention relates to a mutant microorganism having enhanced capacity for generating ethanol using glycerol or crude glycerol as a carbon source, and to a method for producing ethanol using same. More particularly, the present invention relates to a mutant microorganism having high ethanol generation ability from glycerol or crude glycerol, wherein the enzymatic activity of alcohol dehydrogenase (AdhII) is increased and the enzymatic activity of 1,3-propanediol oxidoreductase (DhaT) is decreased in the mutant organism. The present invention also relates to a microorganism improved by means of the aforementioned mutation, and to a method for producing ethanol using the mutant microorganism.
Abstract:
The present invention relates to a method for producing 3-hydroxypropionic acid by cultivating a mutated microorganism in a medium containing glycerol, wherein a gene encoding a protein which uses propanediol is inserted into and amplified in the mutated microorganism which is then capable of producing coenzyme B12 and 3-hydroxypropionic acid using glycerol as a carbon source. The present invention enables the preparation of 3-hydroxypropionic acid in high yield from glycerol without having to add expensive coenzyme B12 as a cofactor.