将多聚烯价值化为多基酸的联合热化学-生物技术方法:微生物联盟开发了一种综合生物转化工艺
Passanun Lomwongsopon1, Tanja Narancic2, Reinhard Wimmer3
1Section of Bioresources and Process Engineering, Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220, Aalborg, Denmark.
Chemosphere
|November 4, 2024
概括
这项研究开发了一种微生物过程,将塑料废物中的聚烯烯 (PO) 转化为有价值的生物塑料. 这种综合方法解决了塑料污染问题,并增强了聚烯的循环经济.
科学领域:
- 生物技术和环境科学 生物技术和环境科学
- 聚合物科学与工程 聚合物科学与工程
- 微生物工程 微生物工程
背景情况:
- 持久聚烯烯 (PO) 废物带来了重大的环境挑战,导致污染和物质损失.
- 对PO热解侧流的利用对于可持续的废物管理和资源回收至关重要.
研究的目的:
- 研究一种集成的热化学-生物技术工艺,用于利用PO热解侧流.
- 开发高效的微生物联盟,将PO生物转化为有价值的产品.
- 为了优化从PO中产生的多基酸盐 (PHAs) 的生产.
主要方法:
- 从热解侧流中回收PO,并使用双表面活性剂系统对其进行乳化.
- 塑料垃圾填埋场注射剂的丰富,以开发PO生物转化混合微生物联盟 (MMC).
- 适应性实验室进化以提高MMC生长和生物转化效率.
- 在受控条件下 (pH,pO2) 用乳化PO培养MMC的生物反应器培养.
- 统计优化以最大限度地提高PHA产量.
主要成果:
- 在没有先前氧化的情况下,PO的成功分散和生物转化.
- 开发适应的MMC,显著提高增长率和减少滞后阶段.
- 高基板消耗 (87%在12小时内,在48小时内完成) 和生物质生产 (2.95 gCDW/L).
- 已证明PO的转化为PHAs,最大标位为384.1 mg/L,与之前的报告相比大幅改善.
结论:
- 综合热化学-生物技术方法有效地利用PO热解侧流.
- 这种方法提供了一个有前途的策略,用于高循环不可循环的富含PO的塑料废物.
- 该研究通过将废物转化为有价值的生物制品,有助于提高塑料行业的循环性.
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