Pretreating lignocellulosic biomass by the concentrated phosphoric acid plus hydrogen peroxide (PHP) for enzymatic hydrolysis: Evaluating the pretreatment flexibility on feedstocks and particle sizes
Pretreating lignocellulosic biomass by the concentrated phosphoric acid plus hydrogen peroxide (PHP) for enzymatic hydrolysis: Evaluating the pretreatment flexibility on feedstocks and particle sizes
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通过浓磷酸加过氧化氢 (PHP) 预处理木质纤维素生物质进行酶水解：评估原料和粒度的预处理灵活性
DOI：
10.1016/j.biortech.2014.05.088
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发表时间：
2014-08-01
影响因子：
11.4
通讯作者：
Deng, Shihuai
中科院分区：
文献类型：
--
作者：
Wang, Qing;Wang, Zhanghong;Deng, Shihuai
为了寻求一条高效的木质纤维原料酶解转化为可发酵糖的前处理途径，尝试用浓磷酸+过氧化氢(PHP)对不同的木质纤维生物质进行预处理，以评价其对原料的预处理灵活性。同时，还考察了前处理对颗粒大小的影响。采用PHP法(H_2O_2和H_3PO_4的最终浓度分别为1.77%和80.0%)对各种原料(农用残渣、阔叶木、针叶材、竹子及其混合物和园艺废弃物混合物)中的木素和半纤维素的脱除效果分别为71-96%和95%以上。结果表明，PHP90%以上的葡萄糖转化率，大大提高了对不同原料的前处理灵活性。此外，对麦草和橡木切片进行不同粒度的PHP处理后，葡萄糖转化率平均分别达到94.9%和100%，变异系数分别为7.9%和0.0%，说明PHP预处理可以显著减弱原料粒度对后续转化率的负面影响。(C)2014爱思唯尔有限公司。保留所有权利。
In order to seek a high-efficient pretreatment path for converting lignocellulosic feedstocks to fermentable sugars by enzymatic hydrolysis, the concentrated H3PO4 plus H2O2 (PHP) was attempted to pretreat different lignocellulosic biomass for evaluating the pretreatment flexibility on feedstocks. Meanwhile, the responses of pretreatment to particle sizes were also evaluated. When the PHP-pretreatment was employed (final H2O2 and H3PO4 concentration of 1.77% and 80.0%), 71-96% lignin and more than 95% hemicellulose in various feedstocks (agricultural residues, hardwood, softwood, bamboo, and their mixture, and garden wastes mixture) can be removed. Consequently, more than 90% glucose conversion was uniformly achieved indicating PHP greatly improved the pretreatment flexibility to different feedstocks. Moreover, when wheat straw and oak chips were PHP-pretreated with different sizes, the average glucose conversion reached 94.9% and 100% with lower coefficient of variation (7.9% and 0.0%), which implied PHP-pretreatment can significantly weaken the negative effects of feedstock sizes on subsequent conversion. (C) 2014 Elsevier Ltd. All rights reserved.