Separation of lignin and glucose in solutions by ultrafiltration
Author(s): HUANG Zhou, MIAO Yelian, CHEN Jieyu, LI Wenli
Pages: 56-62
Year: 2014 Issue: 2
Journal: Chinese Journal of Bioprocess Engineering
Keyword: enzymatic hydrolysis; glucose; lignin; lignocellulose; membrane separation;
Abstract: Solutions of lignin and glucose were used as models of lignocellulose hydrolysates, and the lignin and the glucose were separated using a spiral-wound polyethersulfone membrane with a molecular weight cut-off of 5 000.The effects of lignin concentration and glucose concentration,applied pressure and crossflow velocity on solution flux, lignin retention and glucose retention were discussed.Under the experimental conditions,the solution flux decreased with increasing of glucose concentration and lignin concentration, and increased with increasing of applied pressure and crossflow velocity.The lignin retention was almost constant at 97% .The glucose retention increased with increasing of lignin concentration, and decreased with increasing of crossflow velocity.Under the condition of a lignin concentration at 0.8 g/L,the glucose retention decreased from 14% to 7.3% when the crossflow velocity increased from 0.12 m/s to 0.17 m/s.A suitable crossflow velocity could improve the ultrafiltration separation of the lignin and the glucose.
Pages: 56-62
Year: 2014 Issue: 2
Journal: Chinese Journal of Bioprocess Engineering
Keyword: enzymatic hydrolysis; glucose; lignin; lignocellulose; membrane separation;
Abstract: Solutions of lignin and glucose were used as models of lignocellulose hydrolysates, and the lignin and the glucose were separated using a spiral-wound polyethersulfone membrane with a molecular weight cut-off of 5 000.The effects of lignin concentration and glucose concentration,applied pressure and crossflow velocity on solution flux, lignin retention and glucose retention were discussed.Under the experimental conditions,the solution flux decreased with increasing of glucose concentration and lignin concentration, and increased with increasing of applied pressure and crossflow velocity.The lignin retention was almost constant at 97% .The glucose retention increased with increasing of lignin concentration, and decreased with increasing of crossflow velocity.Under the condition of a lignin concentration at 0.8 g/L,the glucose retention decreased from 14% to 7.3% when the crossflow velocity increased from 0.12 m/s to 0.17 m/s.A suitable crossflow velocity could improve the ultrafiltration separation of the lignin and the glucose.
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