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Enhancement of the Enzymatic Saccharification of the Residues from Wheat Straw Preparation by Ammonium Sulfite Pretreatment
  
DOI:10.11980/j.issn.0254-508X.2015.09.001
Key Words:wheat straw handling residue  ammonium sulfite  pretreatment  chemical composition  enzymatic saccharification
Fund Project:国家自然科学基金(31370571);高等学校博士学科点专项科研基金(20133204110006);江苏省基础研究计划(自然科学基金)(BK20141473);江苏省高校优势学科建设工程资助项目。
Author NameAffiliation
吕佳青1 1.南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏南京,210037 
姜 波1 1.南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏南京,210037 
赵淑晶2 2.山东泉林纸业有限责任公司,山东高塘,252800 
孟 鑫1 1.南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏南京,210037 
金永灿1,* 1.南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏南京,210037 
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Abstract:The effects of ammonium sulfite pretreatment on chemical composition and enzymatic saccharification of the residue from wheat straw preparation were investigated. The results revealed that more lignin was removed with the temperature and the charge of ammonium sulfite increasing. The degradation of hemicellulose increased with the increasing of the temperature distinctly, while the cellulose remained stable during the process of pretreatment. The increasing of the temperature and the charge of ammonium sulfite was beneficial to enhance the enzymatic saccharification. The sugar conversion of pretreated the residue from wheat straw increased with the increase of ammonium sulfite charge and temperature, the charge of ammonium sulfite was more sensitive than the temperature. The glucan and xylan conversion reached up to 88.9% and 44.9%, respectively, and the highest total sugar conversion was 67.0%, when the pretreated substrate with 16% ammonium sulfite charge, and 165℃ was hydrolyzed at a cellulase dosage of 40 FPU per gram of cellulose in substrate.
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