在一个单一的实验单元中利用玉米炉:蒸汽爆炸和半连续的亚临界水处理的协同效应
Francisco D Vezaro1, Suelly R Hollas1, Fernanda A Colombo1
1Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima Avenue, Santa Maria, RS 97105-900, Brazil.
The Science of the total environment
|December 27, 2024
概括
蒸汽爆炸预处理增强了玉米炉的水解,大大提高了可发酵糖的产量. 这种综合方法优化了生物燃料原料的转化,尽管抑制剂的形成增加了.
科学领域:
- 生物质转化和生物能源
- 绿色化学和可持续的过程
- 生物化学工程 生物化学工程
背景情况:
- 红细胞生物质,如玉米炉 (CS),是生物燃料和生物化学品的丰富而可持续的原料.
- 半连续亚临界水解 (SWH) 提供了一种环保的方法来分解纤维素化合物成分.
- 为提高发酵糖 (FS) 产量优化SWH对于高效的生物质价值化至关重要.
研究的目的:
- 研究蒸汽爆炸 (SE) 预处理对玉米炉 (CS) 的影响,以通过次临界水解 (SWH) 提高发酵糖 (FS) 的生产.
- 为了在不同的SWH条件下比较未经处理的CS (UCS) 和预处理的CS (PCS) 的FS产量.
- 为了评估增加FS产量和SE预处理后的抑制剂形成之间的权衡.
主要方法:
- 玉米炉 (CS) 使用蒸汽爆炸 (SE) 在200°C进行了10分钟的预处理,达到纤维素含量为74.06%.
- 未处理 (UCS) 和预处理 (PCS) CS的水解使用230°C和260°C的亚临界水水解 (SWH) 进行.
- 在水解过程中使用了不同的溶剂/生物质比率 (R-20和R-40).
主要成果:
- 蒸汽爆炸 (SE) 预处理显著增加了玉米炉 (CS) 中的纤维素含量.
- 未经处理的CS (UCS) 的最大发酵糖 (FS) 产量为11.67g/100g,预处理的CS (PCS) 的最大产量为19.28g/100g.
- 虽然SE预处理提高了FS产量,但它也导致了抑制化合物的度更高.
结论:
- 将蒸汽爆炸 (SE) 预处理与半连续次临界水解 (SWH) 整合起来,有效地提高了玉米炉 (CS) 的发酵糖 (FS) 产量.
- SE预处理提高了生物质转换的效率,但需要策略来缓解抑制剂的形成.
- 这种综合方法代表了优化从纤维纤维素废物生产生物燃料和生物化学品的有希望的途径.
相关概念视频
Microbial Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
Bioreactor Controls-II
In aerobic fermentations, oxygen is vital for microbial growth and metabolite production. Since air comprises only about 20% oxygen and the gas is poorly soluble in water—just 9 ppm at 20°C—supplying sufficient oxygen becomes a critical challenge, especially in high-demand processes like yeast growth or citric acid production. Even a fully saturated broth may offer only a few seconds of oxygen availability.To address this, sterile or scrubbed air is introduced into the fermentor via a sparger...
Production of Alcohol
Continuous fermentation is a key strategy in industrial ethanol production, particularly when efficiency, scalability, and high yields are essential. This approach allows for uninterrupted operation and optimized resource utilization. The primary feedstock, corn starch, undergoes enzymatic hydrolysis facilitated by α-amylase and glucoamylase. These enzymes break down the starch into fermentable sugars such as glucose, which are readily assimilated by fermentative microorganisms.Fermentation...


