聚基酸盐 (PHB) 的生产和甲吸收由甲型细菌在一个基于膜的反应器
Banu Taskan1, Ergin Taskan1, YenJung Sean Lai2
1Biodesign Swette Center for Environmental Biotechnology, Arizona State University, P.O. Box 875701, Tempe, 85287-5701, AZ, USA; Department of Environmental Engineering, Faculty of Engineering, Firat University, 23119, Elazig, Turkey.
Chemosphere
|August 1, 2025
概括
这项研究优化了使用甲型细菌从甲中生成的聚基酸盐 (PHB). 氨和低溶解氧最大化了生物质和PHB产量,证明了高效的甲转化.
科学领域:
- 生物技术和生物工艺工程
- 微生物代谢和合成生物学
- 环境微生物学环境微生物学
背景情况:
- 甲型细菌将甲转化为有价值的产品,如生物塑料前体聚基酸盐 (PHB).
- 优化生长条件对于最大限度地提高工业应用中的生物质和PHB产量至关重要.
研究的目的:
- 评估源,溶解氧 (DO) 和甲 (CH4) 可用性对甲型细菌生长和PHB生产的影响.
- 评估膜氧化和甲otrophy (MOM) 系统的有效性,以提高甲利用率.
主要方法:
- 基于膜的系统 (MOM) 用于独立输送CH4和O2.
- 三个参数是不同的:源 (氨),DO度 (低),和CH4可用性 (有限/过量).
- 通过细菌产量,CH4消耗,PHB含量和微生物社区分析来衡量性能.
主要成果:
- 作为源的和低DO度导致了最高的生物质产量 (0.59g/gCH4) 和PHB含量 (36%干重).
- 在没有气体循环的情况下,MOM系统实现了高达95.8%的CH4利用效率.
- 在耗过程中限制CH4增加了PHB含量,而限制DO的多余CH4抑制了生长和PHB的产生.
- 甲基和Hyphomicrobium是主要的属,甲基在高PHB产生条件下壮成长.
结论:
- 在优化的条件下 (低CH4压力,有限的DO,),MOM系统有效地提高了甲利用率和PHB产量.
- 特定的环境参数显著影响甲类细菌对PHB合成的代谢输出.
- 这项研究为使用微生物甲转化进行可扩展的生物塑料生产提供了基础.
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