Abstract

The production of value-added products from renewable resources by fermentation is very attractive. In this study, the effect of pretreatment time on the chemical composition of acid-pretreated tea processing waste (TPW), spent tea waste (STW), barley husk (BH), and rye bran (RB) was examined. After the pretreatment processes, reducing sugar concentration (RSC), phenolics (PHs), glucose (Glc), xylose (Xyl), arabinose (Ara), acetic acid (AA), D-glucuronic acid (D-GA), 5-hydroxymethyl furfural (HMF), 2-furaldehyde (2-F) and catalytic efficiency (E, g sugars/g inhibitors) were determined. Results indicated that maximum E values were 3.79, 4.57, 21.28, and 33.46 g/g when the pretreatment times were 50, 6, 30, and 1 min for TPW, STW, BH, and RB, respectively. At these E values, the levels of RSC, PHs, Glc, Xyl, Ara, AA, D-GA, and HMF were 22.85, 1.60, 2.76, 6.98, 4.26, 1.28, 0.62, and 0.81 g/L for TPW; 17.67, 1.12, 1.55, 4.80, 4.05, 0.91, 0.98, and 0.25 g/L for STW; 64.30, 1.25, 30.14, 16.05, 3.57, 0.85, 0.00, and 0.23 g/L for BH; and 66.62, 0.79, 35.21, 13.08, 4.44, 0.00, 0.00, and 0.80 g/L for RB, respectively. Consequently, the hydrolysates obtained after suitable pretreatment times can be evaluated as substrate after removal of the inhibitors formed when necessary.

摘要

通过发酵从可再生资源生产增值产品非常有吸引力。在本研究中，考察了预处理时间对酸预处理茶叶加工废料 (TPW)、废茶废料 (STW)、大麦壳 (BH) 和黑麦麸 (RB) 化学成分的影响。在预处理过程之后，还原糖浓度（RSC）、酚类（PHs）、葡萄糖（Glc）、木糖（Xyl）、阿拉伯糖（Ara）、乙酸（AA）、D-葡萄糖醛酸（D-GA）、5-测定了羟甲基糠醛 (HMF)、2-糠醛 (2-F) 和催化效率 ( E , g 糖/g 抑制剂)。结果表明，TPW、STW、BH和RB的预处理时间分别为50、6、30和1分钟时，最大E值分别为3.79、4.57、21.28和33.46 g/g。在这些ETPW的RSC、PHs、Glc、Xyl、Ara、AA、D-GA和HMF的水平分别为22.85、1.60、2.76、6.98、4.26、1.28、0.62和0.81 g/L；STW 为 17.67、1.12、1.55、4.80、4.05、0.91、0.98 和 0.25 g/L；BH 为 64.30、1.25、30.14、16.05、3.57、0.85、0.00 和 0.23 g/L；RB 分别为 66.62、0.79、35.21、13.08、4.44、0.00、0.00 和 0.80 g/L。因此，在适当的预处理时间后获得的水解产物可以在必要时去除形成的抑制剂后作为底物进行评估。