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New Material: Efficient Preparation Of Succinic Acid From Lignocellulose
Recently, the innovation team of agricultural products biorefinery and transformation of the Institute of Flax Research, Chinese Academy of Agricultural Sciences has built an efficient technology for the preparation of succinic acid green color using lignocellulose as raw material by coupling and optimizing processes such as high-temperature liquid water pretreatment, high concentration substrate enzymolysis saccharification and batch fed fermentation. Relevant research results were published in Biological Resources Technology.
As one of the most important industrial platform compounds, succinic acid has important application value in the fields of degradable materials, medicine and food. Using abundant and renewable waste lignocellulose from agricultural and forestry processing as raw material for succinic acid production will not only help reduce pollution in the process of waste disposal and the synthesis of succinic acid from fossil materials, but also promote farmers' income increase and carbon reduction in industrial and agricultural production. Succinic acid and other organic acids are formed by metabolic transformation of sugar. In the bio refining process of lignocellulose, how to obtain high concentration fermentable sugar from raw materials and achieve efficient conversion is the main challenge currently facing.
In order to reduce the environmental pollution in the pretreatment process of lignocellulose, researchers used hydrothermal pretreatment technology to reduce the structural barrier of lignocellulose raw materials against enzymatic hydrolysis. By exploring and optimizing the key process parameters affecting the pretreatment effect, the degradability of lignocellulose substrate was significantly improved.
Scientific researchers have built a washing free and drying free efficient sugar platform for lignocellulose pretreatment residues by using strategies such as enzyme hydrolysis system compounding and batch feeding, which not only obtains high concentration fermentable sugar, but also significantly reduces water consumption, energy consumption and waste liquid discharge in the pretreatment process. On the basis of fully evaluating the impact of hydrothermal pretreatment waste liquid on succinic acid fermentation efficiency, researchers have constructed a succinic acid fermentation process with partial recharge of pretreatment liquid, which can effectively reduce the waste liquid discharge in the process of succinic acid biological refining while fully utilizing pentose in the waste liquid.
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