两种制造工艺生产的热塑性聚乙烯醇薄膜在富集培养物中的甲烷生物降解

IF 4.1 2区 环境科学与生态学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Ming-Le Ji , Yi-Fan Liu , Yu Bai , Zhen Hu , James H. Wang , Jia-Yi Li , Wan-Qi Qin , Lei Zhou , Shi-Zhong Yang , Ji-Dong Gu , Yingcheng Li , Bo-Zhong Mu
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引用次数: 0

摘要

热塑性聚乙烯醇(TPVA)是一种可生物降解的聚合塑料,在一系列应用中有望替代传统的不可生物降解塑料。然而,人们对 TPVA 厌氧生物降解的了解仍然有限。在这项研究中,我们评估了采用挤出铸膜法和双轴定向法制造的两种 TPVA 薄膜的厌氧生物降解情况。结果表明,在厌氧条件下,挤压铸膜法制备的 TPVA 薄膜降解更快,尤其是在垃圾填埋场富集的培养物中,降解速度快于采油水。利用 PICRUSt 软件进行了 16S rRNA 测序和功能预测,结果表明,在降解过程的初始阶段,协同菌目和芽孢杆菌目中的成员可能负责分泌胞外酶来解聚 TPVA。此外,甲烷菌(如 Methanothermobacter、Methanoculleus 和 Methanosarcina)在降解 TPVA 时利用细菌伙伴产生的 H2、CO2 和醋酸盐生成甲烷。这项工作为不同生产工艺生产的 TPVA 的厌氧生物降解过程提供了比较分析和依据。这对今后推广 TPVA 的应用和减轻环境污染具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Methanogenic biodegradation of thermoplastic poly(vinyl alcohol) films produced by two manufacturing processes in enrichment cultures

Thermoplastic polyvinyl alcohol (TPVA) is a biodegradable polymeric plastic and is a promising alternative to traditional non-biodegradable plastics in a range of applications. However, the knowledge of anaerobic TPVA biodegradation is still limited. In this study, we evaluated the anaerobic biodegradation of two types of TPVA films manufactured using extrusion film casting and biaxial orientation methods. The results indicated that TPVA films prepared by extrusion casting were more rapidly degraded under anaerobic conditions, especially in cultures enriched from landfills than oil production water. 16S rRNA sequencing and functional prediction were performed by software PICRUSt. The results showed that members in Synergistales and Bacillales were likely responsible for secreting extracellular enzymes to depolymerize TPVA during the initial stage of the degradation process. Moreover, methanogens, such as Methanothermobacter, Methanoculleus, and Methanosarcina utilized the H2, CO2, and acetate produced from bacterial partners when degrading TPVA to generate methane. This work provides a comparative analysis and a basis for the process of anaerobic biodegradability of TPVA produced by different manufacturing processes. It is of significant importance for the future promotion of TPVA applications and the mitigation of environmental pollution.

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来源期刊
CiteScore
9.60
自引率
10.40%
发文量
107
审稿时长
21 days
期刊介绍: International Biodeterioration and Biodegradation publishes original research papers and reviews on the biological causes of deterioration or degradation.
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