Method for joint production of ethanol and microbial lipid by using methyl cellulose as raw material

A microbial oil and lignocellulose technology, which is applied in the fields of biofuel, fuel, petroleum industry, etc., can solve the problems of difficult management, slow growth of woody oil plants, difficulty in large-scale development and utilization, etc., to reduce waste liquid discharge, The effect of low price and reduced cost of nitrogen source
CN102154381AActive Publication Date: 2011-08-17TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2011-08-17

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Abstract

The invention provides a method for joint production of biological ethanol and microbial lipid by using methyl cellulose as raw material and then realizing the joint production of ethanol and biodiesel by using the methyl cellulose as the raw material. The method comprises the following steps of: (1) ethanol fermentation is carried out for a cellulose solid obtained after the methyl cellulose is pretreated; (2) a product of hemicellulose hydrolyzation in the pretreatment process is used for microbial lipid fermentation; (3) waste liquor produced after ethanol in ethanol fermentation is recycled and waste liquor produced after microbial lipid is fermented are used for microbial lipid fermentation; and (4) yeast fermented by alcohol and thallus residue produced after lipid extraction are hydrolyzed and then are used as a nitrogen source to be used for ethanol fermentation and microbial fermentation process. The method provided by the invention can convert the methyl cellulose with low grade into two biomass fuels of bioethanol and biodiesel and simultaneously can reduce waste water emission in ethanol production.
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Description

technical field

[0001] The invention belongs to the field of biochemical industry, and relates to a method for coproducing ethanol and microbial oil by using lignocellulose as raw material, which can further convert microbial oil into biodiesel, thereby realizing the coproduction of ethanol and biodiesel by using lignocellulose as raw material. Background technique

[0002] In recent years, due to the depletion of fossil energy and the carbon dioxide, nitrogen oxide, sulfur oxide and black smoke emitted after combustion, which have caused serious environmental pollution problems, the development of renewable alternative energy sources, such as biofuels, has received a lot of attention from all over the world. widespread attention. Among them, bioethanol and biodiesel are the two most concerned biofuels.

[0003] Bioethanol can be produced from starchy raw materials such as corn and wheat through microbial fermentation, but the production of bioethanol from grains will cause...

Claims

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