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林产化学与工业

林产化学与工业 ›› 2012, Vol. 32 ›› Issue (5): 11-18.

• 1研究报告 • 上一篇    下一篇

阴离子交换树脂对玉米秸秆蒸汽爆破预处理液的选择性脱毒

徐勇1,2,3, 江寅申1, 左志凤1, 张行星1, 勇强1,2, 余世袁1,2   

  1. 1. 南京林业大学 化工工程学院, 江苏 南京 210037;2. 林木遗传与生物技术教育部重点实验室,江苏 南京 210037;3. 江苏省生物质绿色燃料与化学品重点实验室, 江苏 南京 210037
  • 收稿日期:2012-05-04 修回日期:1900-01-01 出版日期:2012-10-30 发布日期:2012-10-30

Selective Detoxification of Steam Explosion Pretreated Stream from Corn Stover with Anion Exchange Resin

XU Yong1,2,3, JIANG Yin-shen1, ZUO Zhi-feng1, ZHANG Xing-xing1, YONG Qiang1,2, YU Shi-yuan1,2   

  1. 1. College of Chemical Engineering,Nanjing Forestry University, Nanjing 210037, China;2. Key Laboratory of Forest Genetics & Biotechnology,MED, Nanjing 210037, China;3. Jiangsu Key Lab of Biomass-based Green Fuel & Chemicals, Nanjing 210037, China
  • Received:2012-05-04 Revised:1900-01-01 Online:2012-10-30 Published:2012-10-30

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摘要： 分别以糖-酸-醛模拟液和玉米秸秆蒸汽爆破预处理液为实验材料,比较了4种典型的阴离子交换树脂的选择性交换吸附脱毒性能,从中筛选出大孔型苯乙烯系阴离子交换树脂D301。D301树脂可以选择性地吸附脱除模拟液大部分酸类和呋喃醛类抑制物,但几乎不吸附糖类。其中,酸类的交换吸附符合Freundlich多分子层等温吸附特征,而糖类和呋喃醛类符合Langmuir单分子层吸附特征。在玉米秸秆蒸汽爆破预处理液中,D301树脂仍然保持对酸和呋喃醛类抑制物的选择性交换吸附性能,但是受未知成分杂质的复杂交换作用的影响和干扰,它对酸类和糠醛类抑制物的总脱除率由 70.2 % 显著下降至 44.5 %,降幅达 36.6 %;而对单糖类的吸附率由 1.2 % 大幅急剧提高至 25.5 %~37.9 %,增幅达 20~31倍;低聚木糖和低聚葡萄糖的吸附率分别达到 13.7 % 和 10.6 %。采用减压蒸发浓缩与树脂吸附相结合联合脱毒方法可脱除 69.1 % 和 94.4 % 的酸类和醛类,脱除 75.4 % 色素类和 33.9 % 木质素分解物质,同时造成糖类损失 16.3 %。联合脱毒方法可以有效提高玉米秸秆蒸汽爆破预处理液的发酵生产性能,但是距离工业化发酵生产水平的差距仍然较大,仍需要针对木质纤维原料预处理体系的脱毒技术开展更加广泛和深入的研究工作。

关键词: 木质纤维资源生物炼制, 抑制物脱毒, 阴离子交换树脂, 蒸汽爆破预处理, 乙醇发酵

Abstract: The selective adsorption detoxification capacity (SADC) were experimentally compared among 4 anion exchange resin products respectively in the simulated solution (SS) by mixed sugars, organic acids, furan aldehydes and the steam explosion pretreated stream from corn stover (SES). A macroporous styrene series, i.e. weakly alkaline anion exchange resin D301, was then selected due to its better adsorbing priority to inhibitors of acids and furan aldehydes than sugars in SS and SES. Resin D301 could adsorb most inhibitors but little sugars in SS. For resin D301, acids adsorption was in agreement to Freundlish multilayer isothermal adsorption feature but sugars and furan aldehydes adsorption were in agreement with Langmuir monolayer isothermal adsorption feature. Resin D301 still showed its SADC in SES. It was different from SS in SES that the total inhibitors adsorption ratio decreased markedly by 36.6 % from 70.2 % to 44.5 %, but on the contrary, the monosaccharide adsorption ratio raised sharply by 20-31 times from 1.2 % to 25.5 %-37.9 %. The adsorption ratio of xylo-oligosaccharide and gluco-oligosaccharide reached 13.7 % and 10.6 % respectively because of unknown components interference. 69.1 % of acids, 94.4 % of furan aldehydes, 75.4 % of colored substances and 33.9 % of degraded lignin were removed together with 16.3 % of sugars in SES by the combined method of vacuum evaporation and resin D301 adsorption. Although the combined method for detoxification of SES showed a promising future in effectively improving the fermentability of SES, we still have to face the big gap from industrial production. It was noticed that the wider and deeper study is needed to develop the detoxification technology of pretreated lignocellulosic biomass.

Key words: lignocellulosic biomass biorefinery, detoxification of inhibitors, anion exchange resin, steam explosion pretreatment, ethanol fermentation

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