从棉花中微生物合成乳酸,用于生产多乳酸
Meenakshi Paswan1, Sudipto Adhikary2, Heba Hassan Salama3
1Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat 395007, India.
Microorganisms
|August 26, 2023
概括
棉花茎废物是一种低成本的介质,用于使用乳球菌生产乳酸. 这种微生物合成产生了光学纯净的乳酸,对于聚乳酸应用至关重要.
科学领域:
- 生物技术是生物技术.
- 生物精炼是生物精炼的一种方式.
- 可持续化学 可持续化学
背景情况:
- 农业废物,如棉花茎,为可持续生物加工提供了机会.
- 乳酸是聚乳酸 (PLA) 的关键前体,这是一个具有越来越多工业需求的可生物降解聚合物.
- 目前的乳酸化学合成产生了racemic混合物,不适合许多高价值应用.
研究的目的:
- 研究使用棉花茎作为微生物乳酸生产的低成本基质.
- 识别和表征能够有效地从林氏纤维素生物质合成乳酸的微生物菌株.
- 优化上游的工艺参数,以最大限度地提高乳酸产量.
主要方法:
- 来自各种来源的乳杆菌分离物的查,以生产乳酸.
- 使用从棉花茎中回收的纤维素作为微生物发酵的基质.
- 优化发酵参数,包括注射剂大小,基质度,温度,和生产时间.
- 通过使用各种催化剂进行直接的多重凝聚,合成聚乳酸.
主要成果:
- 从厨房废物中分离出来的一种新型乳球球菌菌株 (Lactococcus cremoris) 显示出高乳酸产量 (51.4 g/L).
- 确定了最佳的发酵条件:10%的注射液,74.23g/L的降解糖,37°C,220rpm和24h的生产年龄.
- 微生物合成产生了光学纯的乳酸,适合用于PLA生产,与化学合成的血混合物不同.
- 通过使用基托,YSZ和Sb2O3.3.等催化剂成功合成了多乳酸.
结论:
- 棉花茎是微生物乳酸生产的可行且具有成本效益的基质.
- 微生物合成为先进的PLA应用所需的光学纯乳酸提供了一条途径.
- 这种方法通过利用农业废物来支持低碳循环生物经济.
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