稻草降解复合菌系LZF-12发酵特性研究  

Characteristic of rice straw degradation by microbial system LZF-12

作　　者：李文哲[1] 朱婷[2] 徐凤花[2] 郑国香[1] 郑文玲[2] 刘爽[1] 

机构地区：[1]东北农业大学工程学院,哈尔滨150030 [2]东北农业大学资源与环境学院,哈尔滨150030

出　　处：《东北农业大学学报》2013年第8期99-104,共6页Journal of Northeast Agricultural University

基　　金："十二五"国家支撑计划课题(2011BAD15B04);国际科技合作项目(2010DFB60680-1)

摘　　要：在中温(35℃)条件下,采用分批补料发酵试验,分析补料量对复合系LZF-12降解稻杆的影响。结果表明,稻草降解率随补料量增加而提高,在补料量为250 mL时达到最大值76%。乙酸和丁酸是主要液相末端产物,质量浓度占总VFAs质量浓度的90%以上。补料发酵时,每次添加稻草24 h后pH降到最低,乙酸含量也达到最大值,随后逐渐升高直到下一次添加稻草;COD、总氮、氨氮含量均呈现出相近规律的周期性变化。To investigate influence of feed amount on degradation of rice straw by complex microbial system LZF-12, fed-batch fermentation was conducted under mesophilic （35 ℃） condition. The results showed that degradation rate was improved with increase of feed amount, and the maximum degradation rate was obtained at feed amount of 250 mL. Acetic acid and butyric acid which account for 90% of the total volatile fatty acids is dominant liquid fermentation product. Once after adding rice straw, the pH value decreased minimum and the content of acetic acid increased maximum after 24 h. Then the pH value had increased gradually until next add of rice straw. COD, total nitrogen, ammonia nitrogen content showed similar regular changes.

关 键 词：复合菌系 稻秆降解 分批补料发酵 发酵产物 

分 类 号：S767.5[农业科学—森林保护学] X172[农业科学—林学]