An integrated strategy of reusing acid hydrolysate combining adapted Bacillus coagulans fermentation for comprehensive utilize carbohydrates of Chinese fir sawdust.
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| Title: | An integrated strategy of reusing acid hydrolysate combining adapted Bacillus coagulans fermentation for comprehensive utilize carbohydrates of Chinese fir sawdust. |
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| Authors: | Ouyang, Shuiping1,2 (AUTHOR) ouyangsp1990@163.com, Fu, Jiaming1 (AUTHOR) fuxiaoran@njfu.edu.cn, Liu, Chao3 (AUTHOR) liuchao@seu.edu.cn, Zheng, Zhaojuan1 (AUTHOR) zhengzj@njfu.edu.cn, Ouyang, Jia1 (AUTHOR) hgouyj@njfu.edu.cn |
| Source: | Industrial Crops & Products. Dec2024:Part 5, Vol. 222, pN.PAG-N.PAG. 1p. |
| Subjects: | Biological evolution, Lactic acid, Bacillus (Bacteria), Sulfuric acid, Wood waste, Hemicellulose |
| Abstract: | In this study, an efficient and economical method for fractionation and sequential utilization of whole components of Chinese fir sawdust (CFS) was explored. By reusing hemicellulose hydrolysate, 54 % sulfuric acid was saved during the pretreatment process. Additionally, a robust strain of Bacillus coagulans CC17B was obtained through adaptive evolution, which not only could utilize the 100 % (v/v) reused hydrolysate without detoxification but was also unaffected by carbon catabolism repression. Combined with fed-batch simultaneous saccharification and fermentation, 54.8 % of the carbohydrate of Chinese fir sawdust was finally converted to lactic acid through B. coagulans CC17B. Furthermore, 44.6 % of the lignin was recovered from the liquid fraction, showing potential for efficient conversion to bio-oil. Overall, the hydrolysate reusing process and high robust strain of B. coagulans CC17B was applied to improve the economics of CFS biorefinery, which provides a promising strategy for the complete utilization of softwood biomass. [Display omitted] • The dilute acid usage was saved 54 % through hemicellulose hydrolysate reusing. • A robust Bacillus coagulans with excellent tolerance to hemicellulose hydrolysate was obtained. • The holocellulose of softwood were converted to lactic acid through B. coagulans CC17B. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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