食品科学 ›› 2009, Vol. 30 ›› Issue (8): 72-75.doi: 10.7506/spkx1002-6630-200908012

• 工艺技术 • 上一篇    下一篇

秸秆两步发酵法制备丁二酸研究

李兴江,陈小举,姜绍通,潘丽军   

  1. 合肥工业大学生物与食品工程学院
  • 收稿日期:2008-06-17 修回日期:2008-08-30 出版日期:2009-04-15 发布日期:2010-12-29
  • 通讯作者: 姜绍通 E-mail:jiangshaotong1954@163.com
  • 基金资助:

    “十一五”国家科技支撑计划项目(2007BAD34B01);安徽省自然科学基金项目(070411024);合肥工业大学校科学研究发展基金项目(073002F)

Preparation of Succinic Acid from Crop Straw via Two-step Fermentation

LI Xing-jiang,CHEN Xiao-ju,JIANG Shao-tong,PAN Li-jun   

  1. (College of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China)
  • Received:2008-06-17 Revised:2008-08-30 Online:2009-04-15 Published:2010-12-29
  • Contact: JIANG Shao-tong, E-mail:jiangshaotong1954@163.com

摘要:

目的:以秸秆为原料进行生物转化制备有机酸。方法:在秸秆汽爆法预处理的基础上,以绿色木霉为菌种进行秸秆降解发酵,对降解单糖接种放线杆菌进行二次发酵制备丁二酸。结果:第一步绿色木霉发酵时,通气量0.3L/L·min,30℃发酵36h,后将发酵扩增8倍进行55℃酶解24h,五、六碳糖累积浓度达到49.4g/L。第二步产丁二酸放线杆菌发酵时,控制温度37℃、罐内CO2 压力0.11MPa、转速250r/min,发酵40h,最终产丁二酸累积浓度为67g/L。结论:秸秆制备丁二酸的两步发酵法工艺具有工业推广价值。

关键词: 农作物秸秆, 丁二酸, 产丁二酸放线杆菌, 绿色木霉, 两步发酵

Abstract:

Objective: To produce a large scale of succinic acid through the bioconversion of crop straw. Methods: Crop straw was pretreated by steam-explosion method. Then Trichoderma viride was used to degradating crop straw in the first-step fermentation and Actinobaccillus succinogenes was used for producing succinic acid in the second-step fermentation. Results: The yield of pentose and hexose is about 49.4 g/L when the conditions of first-step fermentation were as follows: fermentation at 30 ℃ for 36 h, then enlargement of the broth by 8 times of volume and hydrolysis at 55 ℃ for 24 h. The yield of succinic acid is about 67 g/L when the second-step fermentation condition was as follows: jar pressure of CO2 0.11 MPa, rotation rate 250 r/min, and fermentation at 37 ℃ for 40 h. Conclusions: The two-step fermentation technology is worth extending to industrial production of succinic acid from crop straw.

Key words: crop straw, succinic acid, Actinobacillus succinogenes, Trichoderma viride, two-step fermentation

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