NaOH预处理对青稞秸秆厌氧发酵特性的影响  

Effect of NaOH Pretreatment on Anaerobic Fermentation Characteristics of Hulless Barley Straw

作　　者：柳丽 杜中平 李屹[1] 陈来生[1] 韩睿[1] LIU Li;DU Zhongping;LI Yi;CHEN Laisheng;HAN Rui(Qinghai Key Laboratory of Vegetable Genetics and Physiology,Academy of Agriculture and Forestry Sciences,Qinghai University,Xining 810016,China)

机构地区：[1]青海大学农林科学院,青海省蔬菜遗传与生理重点实验室,西宁810016

出　　处：《中国农业科技导报》2022年第8期192-200,共9页Journal of Agricultural Science and Technology

基　　金：青海省自然科学基金面上项目(2021-ZJ-921)。

摘　　要：为提高青稞秸秆的综合利用率,采用NaOH对青稞秸秆进行预处理,研究不同水平NaOH和预处理时间对青稞秸秆厌氧发酵性能的影响,探讨NaOH在青稞秸秆厌氧发酵中应用的可行性。结果表明,与未经处理的青稞秸秆相比,NaOH预处理可以显著提高青稞秸秆产甲烷性能(P<0.05),且产气速率快、发酵周期短。其中,5%NaOH处理12 h青稞秸秆的累积甲烷产量高于多数木质纤维素类废弃物,为250.03 mL·g^(-1),是优良的发酵原料。NaOH预处理增加了青稞秸秆中纤维素含量(13.37%~39.31%),并有效降解了木质素(12.89%~64.34%)和半纤维素(0.96%~30.30%)含量。表明NaOH预处理是提高青稞秸秆厌氧发酵产甲烷性能的有效方法。In order to increase the comprehensive utilization rate of hulless barley straw,NaOH was used to pretreat hulless barley straw. The effects of different level NaOH and pretreatment time on anaerobic fermentation performance were studied,and the feasibility of NaOH in anaerobic fermentation of hulless barley straw was explored. The results showed that compared with the untreated hulless barley straw,the hulless barley straw pretreated with NaOH could significantly improve the performance of methane production(P<0.05),and the production rate of methane gas was faster and the fermentation period was shorter. The cumulative methane production of hulless barley straw treated with 5% NaOH for 12 h was higher than most lignocellulosic wastes,reaching 250.03 mL·g^(-1). It indicated that the hulless barley straw was an excellent raw material for anaerobic fermentation. NaOH pretreatment increased cellulose content(13.37%~39.31%) in hulless barley straw and effectively degraded lignin(12.89%~64.34%)and hemicelluloses(0.96%~30.30%). The study showed that NaOH pretreatment was an effective method to improve the performance of methane production by anaerobic fermentation of hulless barley straw.

关 键 词：青稞秸秆 厌氧发酵 NaOH预处理 甲烷 

分 类 号：S216.4[农业科学—农业机械化工程] X71[农业科学—农业工程]