CAJ | 학술논문

以竹加工废弃物中纤维素、木聚糖组分高附加值利用为目的,采用内切木聚糖酶选择性降解竹屑木聚糖,制备高附加值产品低聚木糖,竹屑制备低聚木糖的废渣经糖化、发酵制备乙醇. 采用7%的NaOH提取竹屑木聚糖1 h,木聚糖提取率为57.81%,竹屑木聚糖再在25 U/g内切木聚糖酶定向水解下,低聚木糖得率为39.49%,低聚木糖对青春双歧杆菌有良好的增殖作用. 竹屑木聚糖抽提剩余物在25 U/g纤维素酶和4 U/g β-葡萄糖苷酶条件下水解72 h,纤维素水解得率64.05%. 121.20 g/L纤维素水解糖液经酿酒酵母NLH13发酵40 h,糖利用率和乙醇得率分别为98. 80%和92. 95%. 研究结果可为竹加工废弃物的综合利用提供新的途径.
이죽가공폐기물중섬유소、목취당조분고부가치이용위목적,채용내절목취당매선택성강해죽설목취당,제비고부가치산품저취목당,죽설제비저취목당적폐사경당화、발효제비을순. 채용7%적NaOH제취죽설목취당1 h,목취당제취솔위57.81%,죽설목취당재재25 U/g내절목취당매정향수해하,저취목당득솔위39.49%,저취목당대청춘쌍기간균유량호적증식작용. 죽설목취당추제잉여물재25 U/g섬유소매화4 U/g β-포도당감매조건하수해72 h,섬유소수해득솔64.05%. 121.20 g/L섬유소수해당액경양주효모NLH13발효40 h,당이용솔화을순득솔분별위98. 80%화92. 95%. 연구결과가위죽가공폐기물적종합이용제공신적도경.
Xylo?oligosaccharides and ethanol preparation from bamboo processing residues were investigated. The bamboo xylan was selectively degraded by endo?xylanase to produce xylo?oligosaccharides. Xylan extraction residue was used for ethanol production through saccharification and fermentation processes. The xylan of bamboo processing residues was extracted with 7% NaOH solution for 1 h, the xylan extraction yield was 57.81%. The xylan was hydrolyzed by endo?xylanase with the dosage of 25 U/g xylan for 12 h, the xylo?oligosaccharides yield was 39.49%, and the xylo?oligosac?charides have good effect on the proliferation of Bifidobacterium adolescentis. The xylan extraction residue was hydrolyzed by cellulase and β?glucosidase with the dosage of 25 U/g and 4 U/g for 72 h, 64. 05% hydrolysis yield was obtained. The hydrolyzate containing 121.20 g/L glucose was fermented by Saccharomyces cerevisiae NLH13 for 40 h, the glucose consumption and ethanol yield were 98.80% and 92.95%, respectively.