Application of acidic wastewater from monosodium glutamate process in pretreatment and cellulase production for bioconversion of corn stover - Feasibility evaluation
Application of acidic wastewater from monosodium glutamate process in pretreatment and cellulase production for bioconversion of corn stover - Feasibility evaluation
复制标题
味精工艺酸性废水在玉米秸秆生物转化预处理及纤维素酶生产中的应用可行性评价
DOI：
10.1016/j.biortech.2010.04.104
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发表时间：
2010-11-01
影响因子：
11.4
通讯作者：
Qu, Yinbo
中科院分区：
文献类型：
--
作者：
Yao, Lan;Yue, Jun;Qu, Yinbo
降低木质纤维素生物转化的工艺成本是一个挑战。我国味精生产过程中产生大量的酸性废水，废水处理难度大，水质污染严重。本研究以玉米秸秆为原料，分别利用废水中的酸性液体（ALC）和固体残渣组分（SC）进行预处理和纤维素酶生产，以评价其生物转化玉米秸秆的潜力。通过中心组合设计法确定了最佳预处理条件（170 ℃，60 min，0.75%ALC）。在最佳工艺条件下，ALC和H2SO 4处理后的玉米秸秆的化学成分和消化率差异不大（均在84%以上），且经ALC和H2SO 4预处理后的酒液中HMF和糠醛含量差异不大。用SC代替（NH_4）（2）SO_4进行白酒发酵，纤维素酶和β-葡萄糖苷酶活力分别为10.7 U/ml和2.7 U/ml。(C)2010爱思唯尔有限公司版权所有。
Reducing process cost of the bioconversion of lignocellulosic is a challenge. In China, abundant acidic wastewater from monosodium glutamate production is difficult to treat, leading to serious water pollution. In this study, acidic liquid (ALC) and solid residue components (SC) obtained from the wastewater were used in pretreatment and cellulase production, respectively, to evaluate their potential in bioconversion of corn stover. Optimum pretreatment conditions (170 degrees C, 60 min, 0.75% ALC) were identified by a central composite design method. There were little difference in the chemical components and digestibility (above 84%) of between ALC and H2SO4-treated corn stover, and amounts of HMF and furfural in liquor after pretreatment with ALC and H2SO4 under optimum conditions. SC can be substituted for (NH4)(2)SO4 in liquor fermentation to produce cellulase with comparable filter paper (about 10.7 U/ml) and beta-glucosidase (about 2.7 U/ml) activities. (C) 2010 Elsevier Ltd. All rights reserved.