Improving characteristics of biochar produced from collagen-containing solid wastes based on protease application in leather production
Improving characteristics of biochar produced from collagen-containing solid wastes based on protease application in leather production
复制标题
基于蛋白酶在皮革生产中的应用改善含胶原固体废物生产的生物炭的特性
DOI：
10.1016/j.wasman.2020.02.043
复制
发表时间：
2020-03-15
期刊：
影响因子：
8.1
通讯作者：
Liu, Bing
中科院分区：
文献类型：
--
作者：
Cao, Shan;Song, Jinzhi;Liu, Bing
利用工业固体废弃物制备生物炭是近年来研究的热点。本文介绍了碱性蛋白酶、中性蛋白酶和胶原蛋白酶在制革前道工序中的应用，以期在保持成革质量的前提下，替代传统的化学试剂。蛋白酶的应用对前期步骤中产生的含胶原蛋白的固体废物制备生物炭的特性具有显著的积极影响。酶作用时间大于3h，酶促作用后胶原纤维的直径在10~20nm之间。胶原纤维表面的微裂纹对生物炭的形成有明显的影响。蛋白酶的应用替代了传统的污染化学品，减少了传统生产过程中的污染，生物质炭的特性得到明显改善，具有良好的比表面积和较高的含碳量（约70%）。其比表面积可达967 m2/g。这些生物质炭均含有含氧官能团，氧含量均在20%以上。酶制剂在制革生产中的应用对利用含胶原蛋白的固体废弃物制备生物炭的性能有一定的影响。本研究为利用天然生物质废弃物制备生物炭奠定了基础，从而促进了生物质材料的发展。(C)2020爱思唯尔有限公司版权所有。
Preparation of biochar from industrial solid wastes is receiving increasing attention in recent years. In this paper, alkaline protease, neutral protease and collagenolytic protease are used in preliminary steps of leather production, which are expected to replace the traditional chemical agents while preserving quality of the finished leather. The protease application has remarkable positive influence towards characteristics of biochar prepared by collagen-containing solid wastes produced in preliminary steps. The enzymatic action time should be more than 3 h for complete permeation and catalysis, and the diameters of treated collagen fibers were in the range of 10 to 20 nm. The micro-cracks occurring on collagen fibers would have an obviously impact on the formation of biochar. The application of proteases reduce the pollution of traditional production through replacing traditional polluted chemicals, and the characteristics of biochars are obviously improved with good surface area and high carbon content approximately 70%. Its surface area can reach 967 m(2)/g. These biochars contain oxygen-containing functional groups, and the oxygen content of biochars are all over 20%. The enzyme application in leather production are effective to the properties of biochars prepared by collagen-containing solid wastes. This research can serve as a basis for the preparation of biochar derived from of natural bio-wastes thereby promoting the development of bio materials. (C) 2020 Elsevier Ltd. All rights reserved.