蛋白酶 K 对改性生物可降解塑料和厨余垃圾厌氧协同消化的影响：利用微生物逐步分析。

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-02-01 DOI:10.1016/j.biortech.2024.131984

Wenjie Liu , Shizhuo Wang , Songting He , Yang Shi , Cheng Hou , Yuanbo Song , Tao Zhang , Yalei Zhang , Zheng Shen

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引用次数: 0

摘要

本研究旨在探讨蛋白酶K （PK）对厌氧共消化各步骤的关键影响。分步实验结果表明，PK通过引发自水解反应促进可生物降解塑料的水解，直接促进厌氧共消化的水解步骤。随后，PK通过影响产酸菌的增殖，间接促进了产酸和产丙酮的步骤。此外，它还能水解PLA。乳酸含量在第5天达到峰值，达到255.7 mg/L，比未添加PK的情况下增加了35.9 %。最后，PK通过影响产甲烷菌的组成间接促进了产甲烷步骤。与不加PK的情况相比，发酵后的食物垃圾转化为甲烷的比例为41.5 %。该研究为推进PK改性BP替代传统塑料的应用奠定了基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Proteinase K impact on anaerobic co-digestion of modified biodegradable plastic and food waste: Step-by-step analysis with microorganism

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Proteinase K impact on anaerobic co-digestion of modified biodegradable plastic and food waste: Step-by-step analysis with microorganism

This study was designed to explore the key impact of Proteinase K (PK) on every step of anaerobic co-digestion. The results of step-by-step experiments indicated that PK promoted the hydrolysis of biodegradable plastic by initiating self-hydrolysis reactions, directly promoting the hydrolysis step of anaerobic co-digestion. Subsequently, PK indirectly promoted the acidogenesis and acetogenesis steps by impacting the proliferation of acid-producing bacteria. Besides, it could also hydrolyze PLA. Thus, the lactic acid content peaked at 255.7 mg/L on the 5th day, representing an increase of 35.9 % compared to the condition without PK. Finally, PK indirectly promoted the methanogenesis step through its impact on the composition of methanogenic bacteria. This led to more food waste being digested into methane, 41.5 % compared to the condition without PK. This work served as an essential foundation for advancing the application of PK modified BP as a replacement for traditional plastics.

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.