连续水热预处理和酶水解过程中含磷催化剂对糠醛和葡萄糖生产的影响

IF 3.3 3区 农林科学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Fermentation-Basel Pub Date : 2023-08-31 DOI:10.3390/fermentation9090803
Prans Brazdausks, D. Godina, Maris Puke
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引用次数: 0

摘要

木质纤维素生物质是生产生物基化学品的重要原料。然而,一种可持续的、高效的、经济上有竞争力的方法将木质纤维素生物质转化为这些化学物质仍然没有实现。本研究涉及在h3po4 - nah2po4催化的水热预处理过程中,桦木C5碳水化合物选择性分离并转化为糠醛,同时保留木质纤维素残渣中的纤维素用于酶解生产葡萄糖。改变催化剂溶液中H3PO4-NaH2PO4的比例(3:0,2:1,1:1,1:2)。结果表明,64.1 ~ 75.9%的C5碳水化合物转化为糠醛。对桦木木质纤维素残留化学成分分析结果表明,预处理阶段的纤维素损失量不超过初始量的10%。在酶解筛选实验的基础上,选择了合适的预处理催化剂,并进行了深入的研究。采用三因子中心复合面心设计组织酶解实验。可变参数为处理时间(24-72 h)、酶载量(10-20 U/g纤维素)和反应介质中底物量(10-20%)。在最佳条件下,木质纤维素残渣中49.9±0.5%的有效纤维素转化为葡萄糖。
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Phosphorus-Containing Catalyst Impact on Furfural and Glucose Production during Consecutive Hydrothermal Pretreatment and Enzymatic Hydrolysis
Lignocellulosic biomasses have a very important role as raw materials to produce biobased chemicals. However, a sustainable, efficient, and economically competitive way to convert lignocellulosic biomass into these chemicals has still not been achieved. This study is related to the selective separation and conversion of birch wood C5 carbohydrates into furfural during the H3PO4–NaH2PO4-catalyzed hydrothermal pretreatment simultaneously preserving cellulose in the lignocellulosic leftover for glucose production by the enzymatic hydrolysis. The ratio of H3PO4–NaH2PO4 in the catalyst solution was changed (3:0, 2:1, 1:1, and 1:2). Results show that around 64.1 to 75.9% of available C5 carbohydrates were converted into furfural. The results of birch wood lignocellulosic leftover chemical composition analysis show that cellulose losses during the pretreatment stage did not reach more than 10% of the initial amount. Based on the enzymatic hydrolysis screening experiments, a suitable catalyst for pretreatment was selected and an in-depth study was carried out. Enzymatic hydrolysis experiments were organized based on the three-factor central composite face-centered design. The variable parameters were treatment time (24–72 h), enzyme load (10–20 U/g cellulose), and substrate amount in reaction media (10–20%). At optimal conditions, 49.9 ± 0.5% of available cellulose in lignocellulosic leftover was converted into glucose.
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来源期刊
Fermentation-Basel
Fermentation-Basel BIOTECHNOLOGY & APPLIED MICROBIOLOGY-
CiteScore
3.80
自引率
18.90%
发文量
594
审稿时长
7 weeks
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