热液腐殖酸对玉米秸秆堆肥腐殖酸可持续生产的影响

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy Pub Date : 2025-09-12 DOI:10.1016/j.biombioe.2025.108363

Ming Wang, Hao Peng, Qingjie Wang, Manman Wang, Jinxia Fan, Shuang Liu

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引用次数: 0

摘要

玉米秸秆（CS）消化液富含木质纤维素，经厌氧消化后产生大量残渣。研究了连续投料沼气项目中CS消化液（CSD）和CSDC堆肥（CSDC）的热液腐殖化（HTH）特性。180℃高温处理4 h后，CSDC的腐植酸样荧光信号和腐植酸（HA）产率显著高于CS和CSD， HA产率最高分别为31.66 wt%、3.1倍和2.6倍。HTH过程中木质素的降解（去除率为71.78% ~ 87.58%）促进了HA的形成。CSDC的HA在组成和形态上更接近褐煤HA，具有较高的脂肪碳和表面氧含量，与黑土HA相似。这些特性使其具有增强的芳香性、离子交换能力和生物降解性。发芽试验表明，0.001 % HA处理的发芽指数为132%。因此，CSDC是人工HA生产的优良原料，支持CS消化物的高价值利用。

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Valorization of corn straw digestate compost via hydrothermal humification for sustainable humic acid production

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Valorization of corn straw digestate compost via hydrothermal humification for sustainable humic acid production

Corn straw (CS) digestate, rich in lignocellulose, generates substantial residues after anaerobic digestion. This study explored the hydrothermal humification (HTH) characteristics of CS digestate (CSD) and CSD compost (CSDC) from a continuous-feed biogas project. After HTH at 180 °C for 4 h, the humic-like fluorescence signals and humic acid (HA) yield of CSDC were significantly higher than those of CS and CSD, with a maximum HA yield of 31.66 wt%, 3.1 and 2.6 times greater, respectively. Lignin degradation during HTH (removal rates of 71.78 %–87.58 %) promoted HA formation. The HA from CSDC exhibited a composition and morphology more similar to lignite HA, featuring higher aliphatic carbon and surface oxygen content, closely resembling black soil HA. These properties endowed it with enhanced aromaticity, ion-exchange capacity, and biodegradability. A germination test showed that 0.001 % HA treatment achieved a germination index of 132 %. Thus, CSDC is an excellent feedstock for artificial HA production, supporting the high-value utilization of CS digestate.

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来源期刊

Biomass & Bioenergy 工程技术-能源与燃料

CiteScore

11.50

自引率

3.30%

发文量

258

审稿时长

60 days

期刊介绍： Biomass & Bioenergy is an international journal publishing original research papers and short communications, review articles and case studies on biological resources, chemical and biological processes, and biomass products for new renewable sources of energy and materials. The scope of the journal extends to the environmental, management and economic aspects of biomass and bioenergy. Key areas covered by the journal: • Biomass: sources, energy crop production processes, genetic improvements, composition. Please note that research on these biomass subjects must be linked directly to bioenergy generation. • Biological Residues: residues/rests from agricultural production, forestry and plantations (palm, sugar etc), processing industries, and municipal sources (MSW). Papers on the use of biomass residues through innovative processes/technological novelty and/or consideration of feedstock/system sustainability (or unsustainability) are welcomed. However waste treatment processes and pollution control or mitigation which are only tangentially related to bioenergy are not in the scope of the journal, as they are more suited to publications in the environmental arena. Papers that describe conventional waste streams (ie well described in existing literature) that do not empirically address ''new'' added value from the process are not suitable for submission to the journal. • Bioenergy Processes: fermentations, thermochemical conversions, liquid and gaseous fuels, and petrochemical substitutes • Bioenergy Utilization: direct combustion, gasification, electricity production, chemical processes, and by-product remediation • Biomass and the Environment: carbon cycle, the net energy efficiency of bioenergy systems, assessment of sustainability, and biodiversity issues.