Research Progress on Extraction of Hemicelluloses by Combined Pretreatment
Hemicellulose is rich in content with broad application prospects.However,the structure of hemicellulose is complex and diverse,and its high-value utilization is a long-standing challenge.When a single physical,chemical or biological pretreatment was used to extract hemicellulose,there were some limitations in terms of energy consumption,cost and effect.Combined pretreatment could combine the advan-tages of various pretreatment methods and reduce the limitations of single pretreatment.Thus,combined strategy method had become the cur-rent research hotspot for hemicellulose extraction.This paper reviewed the combined pretreatment extraction process of hemicellulose in the wood fiber,such as ultrasound-assisted,microwave-assisted,acid-water heat treatment and alkaline-water heat treatment,etc.,and briefly described the advantages and disadvantages of the various pretreatment methods,with a view to providing theoretical guidance for the extrac-tion and application of hemicellulose.
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