Synergistic Acid Degradation of Corn Stalks by Microwave and Ultrasonic

Abstract

The method for microwave and ultrasonic synergistic acid degradation of corn stalks of the present invention relates to the technical field of deep processing of corn stalks. The operation steps include three steps of pretreatment, feeding and degradation. The microwave and ultrasonic synergy acid degradation of corn of the present invention includes the operation steps It is simple and quick, the preparation process is energy-saving and efficient, and the preparation cost is low. At the same time, it utilizes the high penetration power and high heating efficiency of microwaves, as well as the cavitation effect of ultrasonic waves, and synergistically assists acid degradation of corn stalks. Its reaction temperature is low and no pressure conditions are required. The effect of degradation is achieved, and the reaction conditions are mild, and the active ingredients in the degradation solution will not be destroyed during the degradation process. The reducing sugar yield is as high as 51.63%, which increases the reducing sugar yield of the existing acid degradation technology by more than 60%. , for the subsequent preparation of reducing sugars such as glucose, xylose, arabinose, galactose and mannose by using the degradation solution, which provides high-quality raw materials and greatly reduces the production cost.

Description

technical field [0001] The invention relates to the technical field of deep processing of corn stalks, in particular to a method for synergistic acid degradation of corn stalks by microwave and ultrasonic waves. Background technique [0002] Corn straw is an important recyclable resource for industrial and agricultural production, and is rich in nutrients. It mainly contains cellulose, hemicellulose and lignin, and is also rich in organic matter, nitrogen, phosphorus, potassium and other elements; among them, cellulose and Hemicellulose can obtain reducing sugars such as glucose, xylose, arabinose, galactose, and mannose through chemical or biological methods, and can be used to produce other biological products such as alcohol, xylitol, lactic acid, and furfural. Hemicellulose and lignin constitute the skeleton of corn stover, and the outer layer of cellulose is covered by a layer of hemicellulose and lignin, making corn stover difficult to degrade, resulting in extremely l...

AI Technical Summary

Problems solved by technology

[0002] Corn straw is an important recyclable resource for industrial and agricultural production, and is rich in nutrients. It mainly contains cellulose, hemicellulose and lignin, and is also rich in organic matter, nitrogen, phosphorus, potassium and other elements; among them, cellulose and Hemicellulose can obtain reducing sugars such as glucose, xylose, arabinose, galactose, and mannose through chemical or biological methods, and can be used to produce other biological products such as alcohol, xylitol, lactic acid, and furfural. Hemicellulose and lignin constitute the skeleton of corn stover, and the outer layer of cellulose is covered by hemicellulose layer and lignin layer, making corn stover difficult to degrade, resulting in extremely low recycling rate

At present, the methods of degrading corn stalks mainly include mechanical crushing, acid treatment, alkali treatment, steam explosion, biological treatment, etc. The most commonly used method is acid treatment, but acid treatment requires higher temperature and pressure resistance of equipment. High, the general temperature needs to be above 150°C, and the pressure must be 0.1-0.5MPa to degrade, and the reducing sugar yield is generally about 30%, which increases the cost of degradation, so simply use acid to degrade corn Straw methods are difficult to generalize