摘要
研究旨在提高玉米秸秆的产甲烷性能并在一定程度上减少厌氧发酵过程中的浮渣层。试验采用生物强化水解对玉米秸秆进行预处理,在单因素试验基础上,采用Box-Behnken设计方法考察生物菌剂添加量、水解温度、水解时间对还原糖浓度的影响,并在最佳水解条件下进行厌氧发酵。结果显示:在混合菌菌剂添加量6%、水解温度30℃、水解时间8 h时,玉米秸秆还原糖浓度最大。经过30 d的厌氧发酵,累积甲烷产量最大,为227 m L/g VS,比对照组提高了77.3%;生物强化预处理秸秆发酵的浮渣层体积比的减小量比对照组减少19.0%。研究表明,生物强化水解玉米秸秆能够改善厌氧发酵特性,减少浮渣层形成。
The study was to improve the methanogenic performance of corn straw and reduce the scum layer in the anaerobic fermentation process to a certain extent.In the experiment,the corn straw was pretreated with bioenhanced hydrolysis.Based on the single factor experiment,Box Behnken design method was used to investigate the effect of the amount of biological agents,hydrolysis temperature and hydrolysis time on concentration of reducing sugar,and anaerobic fermentation was carried out under the optimal hydrolysis conditions.The results showed that the concentration of reducing sugar in corn straw was the highest when the amount of mixed bacteria of 6%,the hydrolysis temperature of30℃and the hydrolysis time of 8 h.After 30 d of anaerobic fermentation,the maximum cumulative methane production was 227 mL/g VS,which was 77.3%higher than that of control group.Compared with control group,the reduction of scum layer volume ratio of the bio-enhanced pretreatment straw fermentation was 19.0%.The study indicates that bioenhanced hydrolysis of corn straw can improve the characteristics of anaerobic fermentation and reduce the formation of scum layer.
作者
井洪晶
孙佳正
李文哲
白璐
焦浩
王明
孙勇
JING Hong-jing;SUN Jia-zheng;LI Wen-zhe;BAI Lu;JIAO Hao;WANG Ming;SUN Yong
出处
《饲料研究》
CAS
北大核心
2022年第23期88-92,共5页
Feed Research
基金
国家自然科学基金“秸秆厌氧发酵过程中浮渣层的形成与抑制机理资助(项目编号:52076034)”。
关键词
玉米秸秆
生物强化
厌氧发酵
浮渣层
corn straw
biostrengthen
anaerobic fermentation
scum layer
