通过废物聚乙烯二甲的生物上循环生产多种化学品
Jinjin Diao1, Yuxin Tian2, Yifeng Hu1
1Department of Energy, Environmental, and Chemical Engineering, Washington University in St Louis, St Louis, MO 63130, USA.
Trends in biotechnology
|November 24, 2024
概括
开发Rhodococcus jostii RPET的新遗传工具使得微生物可以将聚乙烯二甲 (PET) 废弃物再循环转化为有价值的化学物质,如利科. 这促进了可持续的塑料废物管理和生物生产.
科学领域:
- 合成生物学 合成生物学
- 微生物生物技术 微生物生物技术
- 环境科学环境科学
背景情况:
- 聚乙烯二甲 (PET) 废物由于其降解性差,造成了重大环境挑战.
- 聚乙烯废物的生物回收利用,包括化学预处理和微生物转化,为废物管理和可持续生产提供了一个有希望的解决方案.
- Rhodococcus jostii RPET菌株可以降解PET单体,但缺乏足够的合成生物学工具来有效地开发细胞工厂.
研究的目的:
- 为Rhodococcus jostii RPET菌株开发新的遗传工具.
- 从PET废物中改造RPET菌株,以提高从PET废物中增加价值的化学品的生产.
- 建立微生物供应链,以从后消费者PET中生产可持续化学品.
主要方法:
- 在RPET中开发可调节基因表达的诱导式和可定位式表达系统.
- 在RPET中实施基于血清酶整合酶的重组工具 (SIRT) 进行基因组编辑.
- 用RPET菌株进行系统工程,用于从PET废物中生物合成利科,脂质和酸盐.
主要成果:
- 成功开发了强大的基因工具,包括表达系统和基因组编辑工具,用于RPET菌株.
- 工程RPET菌株从消费后PET废物中实现了多种化学品的高度生产.
- 在RPET中实现了22.6 mg/l的雷科标位记录,与野生型菌株相比增加了约10,000倍.
结论:
- 开发的遗传工具显著提高了RPET菌株的合成生物学能力.
- 这项工作表明了PET生物回收利用在可持续生产各种化学品方面的潜力.
- 塑料上循环是一种可通用的策略,用于从废物中创建增值产品.
相关概念视频
Types of Step-Growth Polymers: Polyesters
2.2K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.2K
Free-Radical Chain Reaction and Polymerization of Alkenes
7.7K
The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
7.7K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
1.9K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
1.9K
Bioremediation
18.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.2K
Olefin Metathesis Polymerization: Overview
2.0K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.0K
Step-Growth Polymerization: Overview
3.4K
Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
Many natural and synthetic polymers are produced by...
3.4K


