竹渣的碱性过氧化氢预处理及其对生物乙醇生产的理化特性和酶消化率的影响

IF 2.6 4区 工程技术 Q3 ENERGY & FUELS Frontiers in Energy Research Pub Date : 2024-08-27 DOI:10.3389/fenrg.2024.1444813
Sabeela Beevi Ummalyma, Ningthoujam Herojit, Rajeev K. Sukumaran
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摘要

竹子是一种多年生速生植物,是生物燃料和生物基化学转化的可再生生物资源的首选。竹子富含纤维素,由于木质素含量高,其生物质具有很强的抗逆性。印度东北部盛产竹子,可用作生物燃料的原料。在此,我们评估了用不同浓度的碱、过氧化氢和碱性过氧化氢预处理竹子残留物 Dendrocalamus strictus 的情况及其对生物质消化率的影响,以提高 Celic C 纤维素酶混合酶的糖回收率。酶水解数据表明,培养 48 小时后,未经处理的生物质消化率为 40%。用碱预处理的生物质显示,10%加载 0.5% w/v NaOH 的生物质消化率最高,达到 61%。用 H2O2 对竹子进行预处理后,在生物质中添加 1% w/v 的 H2O2 可获得 75% 的最大消化率。碱性过氧化氢的组合预处理显示,生物质消化率的最高效率为 83%,来自负载 1% w/v NaOH-H2O2 的生物质。结晶度指数(CrI)分析表明,经预处理的生物质的结晶度指数从 64% 提高到 70.75%。傅立叶变换红外光谱和扫描电镜分析表明,预处理生物质的官能团、形态和表面发生了变化。成分分析表明,碱性过氧化氢预处理可去除 68% 的木质素。纤维素含量从 52% 增加到 65%,半纤维素从 18.6% 减少到 8.6%。结果表明,竹类废弃生物质有可能成为生物精炼产品的原料,而碱性过氧化氢预处理方法是回收糖分生产生物乙醇的有效策略。
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Alkaline hydrogen peroxide pretreatment of bamboo residues and its influence on physiochemical properties and enzymatic digestibility for bioethanol production
Bamboo is a perennial rapid-growing plant that is given preference for renewable biosources for biofuels and bio-based chemical conversion. Bamboos are rich in cellulose and have highly recalcitrant biomass due to high lignin. Bamboo is abundantly available in Northeastern India and can be utilized as a feedstock biofuels. Here, we evaluated the pretreatment of bamboo residues Dendrocalamus strictus with different concentrations of alkali, hydrogen peroxide, and alkaline hydrogen peroxide and its influence on biomass digestibility for enhancement of sugar recovery with Celic C cellulase enzyme blend. Enzymatic hydrolysis data indicated untreated raw biomass showed a digestibility of 40% after 48 h of incubation. The biomass pretreated with alkali showed a maximum digestibility of 61% obtained from 10% loaded with 0.5% w/v NaOH. Pretreatment of the bamboo with H2O2 shows a maximum digestibility of 75% from biomass loaded with 1% w/v of H2O2. Combinational pretreatment of alkaline hydrogen peroxide showed a maximum efficiency of biomass digestibility of 83% attained from biomass loaded with 1% w/v NaOH-H2O2. Crystallinity index (CrI) analysis showed that CrI increased from 64% to 70.75% in pretreated biomass. FTIR and SEM analysis show changes in functional groups, morphology, and surface of biomass in pretreated biomass. Compositional analysis shows that 68% of lignin removal is obtained from alkaline hydrogen peroxide pretreatment. Cellulose content increased from 52% to 65%, and hemicellulose decreased from 18.6% to 8.6%. Results indicated that the potential possibility of bamboo waste biomass as feedstock for biorefinery products and alkaline hydrogen peroxide pretreatment methods is an efficient strategy for sugar recovery for bioethanol production.
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来源期刊
Frontiers in Energy Research
Frontiers in Energy Research Economics, Econometrics and Finance-Economics and Econometrics
CiteScore
3.90
自引率
11.80%
发文量
1727
审稿时长
12 weeks
期刊介绍: Frontiers in Energy Research makes use of the unique Frontiers platform for open-access publishing and research networking for scientists, which provides an equal opportunity to seek, share and create knowledge. The mission of Frontiers is to place publishing back in the hands of working scientists and to promote an interactive, fair, and efficient review process. Articles are peer-reviewed according to the Frontiers review guidelines, which evaluate manuscripts on objective editorial criteria
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