High conversion of sugarcane bagasse into monosaccharides based on sodium hydroxide pretreatment at low water consumption and wastewater generation
High conversion of sugarcane bagasse into monosaccharides based on sodium hydroxide pretreatment at low water consumption and wastewater generation
复制标题
基于氢氧化钠预处理的甘蔗渣高转化率单糖，耗水量少，废水产生量少
DOI：
10.1016/j.biortech.2016.07.074
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发表时间：
2016
影响因子：
11.4
通讯作者：
Yuan Zhenhong
中科院分区：
文献类型：
--
作者：
Wang Wen;Wang Qiong;Tan Xuesong;Qi Wei;Yu Qiang;Zhou Guixiong;Zhuang Xinshu;Yuan Zhenhong
碱法预处理过程中大量黑液和洗涤废水的产生一直是碱法预处理的关键问题。本工作试图建立一种可持续的方式来回收用于预处理甘蔗渣（SCB）的BL和用于洗涤碱处理SCB的残余固体（RS）的WWW，随后将水解和发酵。随着BL和WWW循环次数的增加，洗涤RS的酶解效率降低。添加0.25%（V/V）的Tween 80可显著提高酶解效果，且对后续发酵无不良影响。与碱预处理的非循环和BL循环方式相比，BL-WWW循环方式不仅可以保持较高的碳水化合物转化为单糖的转化率，节约碱用量45.5%，而且可以节约80%以上的水，废水产生量小于15%。
The generation of a great quantity of black liquor (BL) and waste wash water (WWW) has been key problems of the alkaline pretreatment. This work tried to build a sustainable way to recycle the BL for pretreating sugarcane bagasse (SCB) and the WWW for washing the residual solid (RS) of alkali-treated SCB which would be subsequently hydrolysed and fermented. The enzymatic hydrolysis efficiency of the washed RS decreased with the recycling times of BL and WWW increasing. Tween80 at the loading of 0.25% (V/V) could notably improve the enzymatic hydrolysis and had no negative impact on the downstream fermentation. Compared with the non-recycling and BL recycling ways based on alkaline pretreatment, the BL-WWW recycling way could not only maintain high conversion of carbohydrate into monosaccharides and save alkali amount of 45.5%, but also save more than 80% water and generate less than 15% waste water.