接种娄彻氏链霉菌发酵对秸秆纤维性质的影响  

Effect of inoculation with Streptomyces rochei ZY-2 on fiber properties of straw fibers

作　　者：陈国强 曲萍[2,3] 雍宬 孙恩惠 陈玲[2,3] 黄红英 李飞跃 高斌[4] CHEN Guoqiang;QU Ping;YONG Cheng;SUN Enhui;CHEN Ling;HUANG Hongying;LI Feiyue;GAO Bin(College of Resource and Environments,Anhui Science and Technology University,Chuzhou 239000,China;Institute of Agricultural Resources and Environment,Key Laboratory for Agricultural Environment at the Lower Reach of the Yangtze River Plain,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China;Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization,Nanjing 210014,China;Department of Civil and Environment Engineering,Rensselaer Polytechnic Institute,New York 12180,USA)

机构地区：[1]安徽科技学院资源与环境学院,滁州239000 [2]江苏省农业科学院农业资源与环境研究所农业农村部长江下游平原农业环境重点实验室,南京210014 [3]江苏省有机固体废弃物资源化协同创新中心,南京210014 [4]美国伦斯勒理工学院土木与环境工程系,纽约12180

出　　处：《林业工程学报》2023年第6期93-99,共7页Journal of Forestry Engineering

基　　金：江苏省农业自主创新项目(CX213072);江苏省农业科学院国际合作基金项目(050130002)。

摘　　要：以水稻秸秆为原料,接种娄彻氏链霉菌(Streptomyces rochei),通过生物发酵和机械盘磨制备了秸秆纤维。利用电子万能试验机、接触角测量仪、荧光光谱仪、热重分析仪对不同目数的秸秆纤维及其成型材料的性能进行表征分析。试验结果表明:随着秸秆纤维尺寸的减小,纤维间的结合力逐渐增强,但需要更大的干燥强度。秸秆纤维的持水性和吸水性随着发酵时间的增加呈先增大后减小的趋势,随纤维增大吸水性呈升高趋势,但持水性随纤维的增大呈降低趋势。随着发酵时间的增加,秸秆纤维吸水性先逐渐降低,并且随烘干温度的升高接触角不断增大,在生物发酵7 d时成型材料水溶性有机物最多。烘干温度从150℃升高到190℃,抗张强度先增加后降低,纤维疏水性能逐渐增强;温度低于170℃时,抗张强度随温度升高不断增强,高于170℃则显著下降。接种娄彻氏链霉菌(Streptomyces rochei)发酵对秸秆纤维拆解具有促进效果,经生物发酵7 d和盘磨的秸秆纤维性能最佳,适宜于制备秸秆基质块。Rice straw fibers were prepared by biological fermentation and mechanical disc grinding with rice straws as raw material and inoculated with Streptomyces rochei ZY-2.The properties of straw fibers and their molding materials with different mesh numbers were thoroughly characterized and analyzed using several advanced techniques.The electronic universal testing machine was employed to assess the mechanical properties of fibers and their composites.The contact angle measuring instrument was used to study the effect of straw fiber size on the rate of water volatilization.Additionally,the fluorescence spectrometer was employed to investigate the effect of soluble organic matter in the leachate on the mechanical properties of the materials,while the thermogravimetric analyzer was used to evaluate their thermal stability and decomposition behavior.Through this comprehensive analysis,a comprehensive understanding of the straw fibers and their molding materials was obtained,enabling further insights into their potential applications and optimization of their properties.The findings of this study revealed that as the size of straw fibers decreased,the bon-ding force between the fibers became stronger.However,it was observed that a higher drying strength was required in order to achieve the enhanced bonding.Initially,both water holding capacity and water absorption increased as fermentation time increased.However,beyond a certain point,further increase in fermentation time resulted in a decrease in both water-holding capacity and water absorption.Furthermore,it was noted that as the size of the fibers increased,the water absorption also increased.Conversely,the water-holding capacity decreased with an increase in fiber size.It was found that with the increase of fermentation time,the water absorption of straw fiber increased first and then decreased,and the contact angle increased with the increase of drying temperature.When the drying temperature increased from 150 to 190℃,the tensile strength increased first and then d

关 键 词：秸秆纤维 生物发酵 力学性能 持水性 吸/脱水性 

分 类 号：TQ92[轻工技术与工程—发酵工程]