Biomass is the most abundant renewable resource on earth, with an annual output of approximately 1.5-2.0 × 1012 tons. Its main components include cellulose, hemicellulose and lignin, among which the content of cellulose and hemicellulose accounts for about 70% -80%. Under certain conditions, cellulose and hemicellulose can be hydrolyzed to produce glucose, xylose and other soluble sugar dilute. These carbohydrate compounds can produce fuel ethanol and hydrogen, as well as various carbon-based compounds through chemical or biological conversion methods, such as Glycerin, lactic acid, amino acids, polyols, dibasic acids and other high-value bio-based products. In this way, it can replace the current process of preparing fuel ethanol and other fermentation products using grains and sugars as raw materials, and reduce production costs.
At present, there are three main methods for the conversion of biomass resources into sugar dilute or sugar liquid sugar platforms: direct concentrated acid hydrolysis, direct dilute acid hydrolysis and thermochemical pretreatment plus enzyme hydrolysis. However, due to factors such as efficiency and environmental impact, the development of a new generation of biomass resource hydrolysis technology and the establishment of a new, low-cost sugar platform are still important challenges in achieving efficient utilization of renewable biomass resources.
Recently, the Research Group on Evolution and Metabolic Engineering led by Researcher Wang Qinhong of Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences has developed an efficient, green biomass saccharification technology based on salt / acid coordination, with low salt / acid dosage and high conversion efficiency (up to 85%) . At the same time, the salt (magnesium salt and ionic liquid) used can be recycled and the fermentable sugar produced can also be efficiently used by microorganisms such as Saccharomyces cerevisiae.
At present, relevant researches have applied for two Chinese invention patents (a new method for the production of fermentable sugars by synergistic hydrolysis of biomass with an acid salt, 201110113257.4 and a new method for the production of fermentable sugars with hydrolysis of biomass by ionic liquid, 201110234702.2) And published one article (Bioresource Technology 2011 102 (21)).
Related research was supported by the major project of the Chinese Academy of Sciences Knowledge Innovation Project "High-temperature Cellulose Ethanol Fermentation and Biorefining".
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