从商业生物塑料产品中生产无氧碳酸盐的半酸性发酵探索:基于PHA的杯子和基于PLA的盖子
Yong Jin1, Roel van den Enden1, Elvis Castrikum1
1Environmental Technology, Wageningen University & Research, Axis-Z, Bornse Weilanden 9, 6708 WG Wageningen, the Netherlands.
Bioresource technology
|October 16, 2025
概括
半性开放培养发酵有效地将多基酸盐 (PHA) 生物塑料转化为有价值的碳酸盐. 然而,聚乳酸 (PLA) 生物塑料的降解程度有限,这表明该过程中的生物降解性差异.
科学领域:
- 生物技术和环境科学 生物技术和环境科学
- 微生物生态学 微生物生态学
- 可持续材料 可持续材料
背景情况:
- 像PHA和PLA这样的可生物降解塑料正在获得商业用途.
- 目前这些生物塑料的生命周期末期加工对于碳和能量回收是低效的.
研究的目的:
- 通过介质性开放培养发酵,研究PHA和PLA转化为碳酸盐的过程.
- 评估原材料和商业生物塑料产品的转化效率.
主要方法:
- 使用气体提升无氧过生物反应器与混合微生物培养.
- 发酵的水热预处理PHA和PLA水解剂和切碎的商业生物塑料.
- 在受控的pH值和液压保留时间下,生物反应器运行了200天.
- 使用16S rRNA测序分析微生物群落.
主要成果:
- 从PHA/PLA水解剂中获得高达6.6g/L的酸盐和4.8g/L的n-酸盐.
- 与PHA杯一起发酵增加了碳酸盐,达到7.2g/L乙酸盐和5.5g/L n-丁酸盐.
- 转换了大约35%的基于PHA的杯子,但PLA盖子显示微不足道的降解.
- 确定了Clostridium tyrobutyricum作为一个在水解酸发酵中占主导地位的物种.
结论:
- 半性开放培养发酵是一种可行的方法,用于将基于PHA的产品转化为碳酸盐.
- 基于PLA的产品在这些条件下更强硬,降解效率较低.
- 微生物联盟的组成会影响不同类型的生物塑料的转化效率.
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