Pre-biodrying treatment enhances lignin-related pathways with phenolic hydroxyls as reactive cores to accelerate humification during composting

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

Bioresource Technology Pub Date : 2024-11-08 DOI:10.1016/j.biortech.2024.131786

Jiefei Mo , Changxun Zhao , Chenxuan Fang , Wangyang Yu , Yuzhou Long , Qingqing Mei , Weixiang Wu

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Abstract

The innovative biodrying-enhanced composting (BEC) process produces highly matured fertilizer within 10 d. To clarify the biodrying-accelerated humification mechanism, structural and molecular variations in humic acid (HA) during BEC were compared to those during 16-d bioaugmented mechanical composting without biodrying. Results showed that BEC produced HA with significantly higher aromaticity and molecular size (p < 0.01). More aromatic skeletons, mainly from biodrying-enhanced lignin decomposition (p < 0.05), contributed to HA aromatization. Reactive phenolic hydroxyls on these skeletons facilitated the binding of other humic precursors, promoting HA elongation. Microbial analysis indicated that Bacillus, Sinibacillus, and Issatchenkia, enriched by drastic heating and dehydration during days 0–3, participated in lignin decomposition. Saccharomonospora, Georgenia, Oceanobacillus, Nigrospora, Kluyveromyces, and Aspergillus contributed to HA elongation during the maturation phase (days 3–9). This study’s findings that biodrying enhanced lignin-related humification pathways by enriching functional microorganisms provides a theoretical foundation for further improving compost humification efficiency.

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预生物干燥处理可增强木质素相关途径，以酚羟基作为活性核心，从而在堆肥过程中加速腐殖化。

为阐明生物干燥加速腐殖化的机制，比较了生物干燥强化堆肥（BEC）过程中腐殖酸（HA）的结构和分子变化，以及未进行生物干燥的 16 天生物强化机械堆肥过程中腐殖酸的结构和分子变化。结果表明，BEC 产生的腐殖酸芳香度和分子大小明显更高（p

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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.