生物炭促进生物CO2转化为C2-C6酒精和脂肪酸
Rahul Thunuguntla1, Hasan K Atiyeh1, Hailin Zhang2
1Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, OK, USA.
Bioresource technology
|February 24, 2024
概括
生物炭增强了微生物将二氧化碳 (CO2) 转化为有价值的酒精和酸. 切换草生物炭显著提高了酒精产量,而家禽垃圾生物炭增加了酸性产量,改善了工艺经济性.
科学领域:
- 微生物生物技术 微生物生物技术
- 生物化学工程是生物化学工程.
- 可持续的化学可持续的化学
背景情况:
- 微生物二氧化碳 (CO2) 的利用提供了一种可持续的途径,可以减少碳足迹并产生经济价值.
- 生物炭是一种从生物质热解中获得的富含碳材料,含有可以刺激微生物活动的矿物质和微量金属.
- 某些Clostridium物种以其将二氧化碳转化为有价值的化学物质的能力而闻名.
研究的目的:
- 研究不同生物炭对微生物将二氧化碳转化为C2-C6醇和酸的影响.
- 为了评估在不同温度 (350°C和700°C) 产生的家禽便生物炭 (PLB) 和草生物炭 (SGB) 对微生物发酵的有效性.
- 为了比较三种Clostridium菌株 (C. muellerianum P21,C. ragsdalei P11和C. carboxidivorans P7) 在生物炭的存在下表现.
主要方法:
- 发酵实验使用3种Clostridium菌株与H2:CO2:N2气体混合物 (60:20:20) 在37°C和125rpm的温度下进行化.
- 在350°C和700°C的温度下生产了家禽垃圾和交换草生物炭,并添加到发酵介质中.
- 产品分析的重点是量化发酵过程中产生的C2-C6醇和酸.
主要成果:
- 在350°C (SGB350) 产生的Switchgrass生物炭显著增加了与对照组相比的1.1-2.1倍的酒精度.
- 在350°C (PLB350) 制造的家禽垃圾生物炭增加了1.2-1.7倍的酸度.
- 菌株P11产生的乙醇与SGB350比菌株P7和P21的2.0-3.3倍多. 株P21独特地产生了比SGB350的株P7更多的2.4倍的butanol,包括hexanol.
结论:
- 生物炭,特别是SGB350,可以有效地增强特定的Clostridium菌株从二氧化碳中产生的C2-C6酒精的产生.
- PLB350显示了通过二氧化碳转化增加有机酸产量的潜力.
- 生物炭的使用是一个有希望的策略,可以提高微生物二氧化碳利用过程的经济可行性和效率.
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