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探索地肠道细菌对于塑料降解的潜力

Davi R Munhoz¹, Ke Meng¹, Lang Wang¹

¹Soil Physics and Land Management Group, Wageningen University & Research, Droevendaalsesteeg 3, 6708PB Wageningen, the Netherlands.

The Science of the total environment

|April 4, 2024

概括

虫肠道细菌显示出降解聚乳酸 (PLA) 覆盖膜的潜力. 在特定条件下,Streptomyces fulvissimus (SF) 和Rhodococcus jostii (RJ) 菌株加速了PLA的降解,为塑料生物修复提供了一个有前途的途径.

科学领域:

环境微生物学环境微生物学
聚合物科学聚合物科学
生物修复是一种生物修复.

背景情况:

塑料覆盖膜在农业中至关重要,但有助于土壤塑料垃圾.
开发有效的塑料废物生物修复策略是必不可少的.

研究的目的:

为了研究虫肠道细菌降解各种塑料覆盖膜的潜力.
使用特定细菌菌株优化聚乳酸 (PLA) 薄膜降解条件.

主要方法:

使用五种细菌菌株 (Mycobacterium vanbaalenii,Rhodococcus jostii,Streptomyces fulvissimus,Bacillus simplex,Sporosarcina globispora) 进行塑料薄膜 (LDPE-f,PLA-f,PBAT-f,Bionov-B) 的化. 这些细菌菌菌株的化方法包括:
通过监测分子重量变化,结晶性和体重减轻来分析降解.
通过变化温度,碳源和细菌菌株相互作用优化PLA降解.

主要成果:

在测试的菌株中没有观察到LDPE-f,PBAT-f或Bionov-B的显著降解.
菌株Streptomyces fulvissimus (SF) 在降低PLA-f分子量和增加结晶性方面显示出潜力.
SF和SF + Rhodococcus jostii (RJ) 的共同培养在30°C的低碳环境中显著增强了PLA降解.
酸降解与最终培养基的pH相关,这表明了pH取决于水解机制.

结论:

菌 (Streptomyces fulvissimus) (SF) 和它与Rhodococcus jostii (RJ) 的共同培养表明,它有望加速在玻璃过渡温度以下的PLA降解.
需要进行进一步的研究,以评估这些细菌菌株对于塑料的土壤生物修复的实际可行性.

关键词:

可生物降解的皮膜.生物降解生物降解土虫肠道居住的细菌菌株.聚乳酸 (PLA) 是一种聚乳酸.这种菌株是Streptomyces fulvissimus.

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