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Influence of Waste Liquor Reuse on the Pulp Properties and Lignin Structure of Bambusa Pervariabilis in Ethanol Pulping
Received:October 28, 2022  
DOI：10.11980/j.issn.0254-508X.2023.09.009
Key Words:bambusa pervariabilis  ethanol pulping  waste liquor recycling  organic acids  lignin
Fund Project:兴辽英才计划特聘教授项目（XLYC1802025）。
Author NameAffiliationPostcode
WANG Ruijie Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials， Dalian University of Technology， Dalian， Liaoning Province， 116034 116034
PING Qingwei* Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials， Dalian University of Technology， Dalian， Liaoning Province， 116034 116034
NIU Meihong Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials， Dalian University of Technology， Dalian， Liaoning Province， 116034 116034
SHENG Xueru Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials， Dalian University of Technology， Dalian， Liaoning Province， 116034 116034
ZHANG Jian Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials， Dalian University of Technology， Dalian， Liaoning Province， 116034 116034
LI Na Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials， Dalian University of Technology， Dalian， Liaoning Province， 116034 116034
SHI Haiqiang Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials， Dalian University of Technology， Dalian， Liaoning Province， 116034 116034
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Abstract:In this study， the effects of the reuse rate of pulping waste liquor on the pulp yield， Kappa number， pulping selectivity， yields of lignin and organic acids， and lignin structure in ethanol pulping of bambusa pervariabilis were investigated. The results showed that reuse of waste liquor could inhibit the generation of new organic acids and had a major impact on the degree of lignin degradation， 5%~15% waste liquor would be associated with a low Kappa number of pulp and good pulping selectivity. Taking into comprehensive consideration the factors including the load of waste liquor recovery， the amount of fresh ethanol used， and pulp properties， etc.， it would be appropriate to set the reuse rate of waste liquor at 15%~20%.
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