两种氮源高温发酵生物机械浆性能的比较  

Comparison of Bio-mechanical Pulping Performance of High-temperature Fermentation between Two Nitrogen Sources

作　　者：周虎毅 韩善明[1,2] 黄红英 沈葵忠[1,2] 曲萍[3] 孙恩惠[3] 雍宬[3] 朱北平 房桂干 Zhou Huyi;Han Shanming;Huang Hongying;Shen Kuizhong;Qu Ping;Sun Enhui;Yong Cheng;Zhu Beiping;Fang Guigan(Institute of Chemical Industry of Forestry Products,CAF,Key Lab of Forest Chemical Engineering,SFA,CAF-UT Innovation Platform of Lignocelllulosic Biomass Science and Engineering,Nanjing 210042,Jiangsu,China;Collaborative Innovation Center for High Efficient Processing and Utilization of Forestry Resources,Nanjing Forestry University,Nanjing 210037,Jiangsu,China;Institute of Agricultural Resources and Environment,Jiangsu Academy of Agricultural Sciences/Key Laboratory of Crop and Livestock Integrated Farming,Ministry of Agriculture and Rural Affairs/Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization,Nanjing 210014,Jiangsu,China)

机构地区：[1]中国林业科学研究院林产化学工业研究所,国家林业局林产化学工程重点开放性实验室,生物质化学利用国家工程实验室,江苏省生物质能源与材料重点实验室,南京210042 [2]南京林业大学林业资源高效加工利用协同创新中心,南京210037 [3]江苏省农业科学院农业资源与环境研究所,农业农村部种养结合重点实验室,江苏省有机固体废弃物资源化协同创新中心,南京210014

出　　处：《中华纸业》2022年第20期15-21,共7页China Pulp & Paper Industry

基　　金：江苏现代农业产业关键技术创新“利用农作物秸秆制备水稻育秧基质块关键技术研发与产品创制”[CX(19)2003];国家自然科学基金重大项目课题“木材纤维精准解离与界面调控”(31890771)。

摘　　要：对比研究了稻草尿素和亚硫酸铵两种氮源高温发酵的主要化学组分的降解溶出行为,探讨了耦合高浓盘磨机械解离节能性能和纸浆的强度性能。稻草经两种氮源的娄彻氏链霉菌高温好氧发酵7天,物料得率有较大程度下降,尿素氮源发酵处理得率为71.1%,亚硫酸铵氮源发酵得率73.2%。HPLC分析表明发酵过程物料的得率损失主要来源于半纤维素和纤维素的降解溶出;XRD分析表明尿素氮源发酵7天未构成对稻草纤维素结晶区的实质性破坏。尿素氮源发酵耦合机械制浆,不仅有显著节能效果,同时能够制取强度性能良好的纸浆。磨浆能耗800 kWh/t时,尿素氮源发酵处理所制取纸浆的抗张指数(29.1 N.m/g)、耐破指数(1.67 kPa.m^(2)/g)和环压指数(12.87 N.m/g);比亚硫酸铵氮源发酵处理高。制取相同强度性能的纸浆,尿素发酵处理吨浆能耗至少可以节电600 kWh。The degradation and dissolution behavior of the main chemical components of the N-source high-temperature fermentation of straw urea and ammonium sulfite was compared,and the energy-saving properties of the coupling high-density disc milling mechanical dissociation and the strength performance of the pulp was discussed.The rice straw underwent high-temperature fermentation of Streptomyces rochei of two N sources for 7 days,and the material yield decreased to a large extent.The yield of materials treated with urea as N source was 71.1%,and the yield of materials treated with ammonium sulfite as N source was 73.2%.HPLC analysis showed that the yield loss of the material in the fermentation process was mainly derived from the degradation and dissolution of hemicellulose and cellulose;XRD analysis showed that the fermentation of urea N source did not constitute substantial damage to the crystallization zone of straw cellulose for 7 days.Coupling mechanical pulping with urea as N-source fermentation not only has a significant energy-saving effect,but also enables the preparation of pulp with good strength performance.At 800 kWh/t at the consumption of the pulp,the tensile index(29.1 N·m/g),the breakage resistance index(1.67 kPa·m^(2)/g)and the ring pressure index(12.87 N·m/g)of the pulp prepared by the N-source fermentation treatment of urea as the N source were higher.To produce pulp with the same strength performance,the energy consumption of tons of pulp in urea fermentation treatment can save at least 600kWh.

关 键 词：稻草秸秆 高温发酵 尿素 亚硫酸铵 机械解离 纸浆性能 

分 类 号：TS727.1[轻工技术与工程—制浆造纸工程] TS743.15