Membrane Filtration Applied to the Purification of Sugarcane Bagasse Mild Alkaline Extracts

Clean Technologies

article

Vincent Oriez¹  Nga Thi-Thanh Pham¹  Jérôme Peydecastaing¹  Philippe Behra¹  Pierre-Yves Pontalier¹ 

[1] Laboratoire de Chimie Agro-Industrielle, INRAE, Toulouse INP, Université de Toulouse;Centre RAPSODEE UMR CNRS 5302, Mines Albi, Université de Toulouse, Campus Jarlard

关键词: sugarcane bagasse;    alkaline extraction;    membrane filtration;    lignin;    sugars;   

DOI  :  10.3390/cleantechnol5020027

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

Sugarcane bagasse (SCB), a by-product of the sugar industry, is composed mainly of cellulose, hemicelluloses, and lignin, and can be used to replace petrochemical polymers in various applications. In this work, SCB was treated under mild alkaline conditions with 1.5% NaOH (m:v) and a solid:liquid ratio of 1:20 (m:v) at 60 °C, during 6 h. A 10 kDa polysulfone hollow fiber membrane was used for the purification of the extract in different filtration modes, namely concentration and diafiltration, and a combination of both modes. Permeate fluxes and rejection rates were evaluated at different transmembrane pressure (TMP) at the shear rate of 10,187 s–1, at 40 °C. In concentration mode, increasing the volume reduction factor up to 6.1 led to a significant increase in the retention rates of acid-soluble lignin (ASL) and xylan, and a decrease in inorganic salt content in the retentate. In diafiltration mode, after 2.9 diavolumes, the acid-insoluble lignin (AIL) and xylan rejection rates drastically increased, as did the rejection rates of ash.

【 授权许可】

CC BY