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消费后聚乙烯二甲 (PET) 塑料的双阶段化学微生物降解,由生物质废物催化剂实现

Deepika Shingwekar¹, Helen Laster¹, Hannah Kemp¹

¹Department of Biology, Reed College, Portland, OR 97202, USA.

Bioengineering (Basel, Switzerland)

|November 25, 2023

概括

这项研究介绍了一种两步的PET塑料降解方法,使用色皮灰催化和细菌联盟. 这种可持续的方法有效地将PET分解为可用的单体,为循环回收铺平了道路.

科学领域:

环境科学环境科学
生物技术是生物技术.
材料科学材料科学材料科学

背景情况:

聚乙烯二甲 (PET) 污染对环境构成重大风险,需要新的降解策略.
目前的生物降解方法由于PET的晶体结构而面临限制,需要初始的脱聚合步骤.
一个先前确定的细菌联盟有效地降解了二二乙烯基甲酸盐 (BHET),这是PET脱聚合的副产品.

研究的目的:

开发和评估一种可持续的PET生物降解两步过程.
为了研究皮灰 (OPA) 催化糖解对PET去聚合到BHET的有效性.
用细菌联盟评估BHET的生物相容性和降解效率.

主要方法:

使用OPA催化糖解反应,PET被脱聚合到BHET.
由此产生的BHET经过*Pseudomonas*和*Bacillus*物种的联盟进行了降解.
降解的百分比和速率在2周和10周内进行了监测.

主要成果:

在OPA催化糖解中,从PET中获得了92% (w/w) 的高BHET产量.
细菌联盟证明了与OPA衍生的BHET的生物相容性.
在2周内观察到17%的总体两级降解,在10周内达到33%.

结论:

开发的两步过程为可持续的PET生物降解提供了一个可行的途径.
由OPA催化的糖解,随后细菌降解对PET废物管理有很大的前景.
进一步的研究可以优化完整降解的过程,并使PET单体的循环回收成为可能.

关键词:

在PET塑料塑料中,PET是塑料的.生物催化剂生物催化剂生物降解生物降解脱聚合脱聚合的过程葡萄糖溶解是什么聚乙烯四甲酸的使用情况.回收回收是回收的过程.

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