Assessment of seasonal feedstock changes in long-term anaerobic digestion: Monoterpenes influence on the microbial consortium

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING Biomass & Bioenergy Pub Date : 2025-03-01 Epub Date: 2025-02-07 DOI:10.1016/j.biombioe.2025.107674

Ángeles Trujillo-Reyes , Ana G. Pérez , Antonio Serrano , Javier Ramiro-García , Juan Cubero-Cardoso , Fernando G. Fermoso

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Abstract

The anaerobic digestion (AD) of fruit and vegetable waste (FVW) from wholesale markets can be significantly impacted by seasonal variations in feedstock composition. For this reason, this research aimed to evaluate the adaptability of anaerobic reactors to the different disturbances in feedstocks composition that may develop during long-term treatment of FVWs. Results showed that the system could be flexible enough to cope with type feedstock changes with an appropriate gradual adaptation process. Monoterpenes accumulation led to a decline in acetoclastic methanogens, particularly Methanosarcina, resulting in volatile fatty acids (VFAs) accumulation and process acidification. However, monoterpenes content reduction in the feedstock enabled AD process recovery, increased Methanosarcina relative abundance, stabilized methane production at 224 ± 13 mL CH₄/g VS, and decreased VFAs by approximately 20 %. Therefore, it could be concluded that monoterpenes are compounds with a relevant potential impact and their cumulative levels in anaerobic reactors must be carefully monitored.

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长期厌氧消化中季节性原料变化的评估：单萜烯对微生物群落的影响

来自批发市场的水果和蔬菜废物（FVW）的厌氧消化（AD）可能受到原料组成的季节性变化的显著影响。因此，本研究旨在评估厌氧反应器对FVWs长期处理过程中可能出现的不同原料组成干扰的适应性。结果表明，通过适当的逐步适应过程，该系统能够灵活地应对原料类型的变化。单萜积累导致产甲烷菌，特别是产甲烷菌的减少，导致挥发性脂肪酸（VFAs）积累和过程酸化。然而，原料中单萜含量的降低使AD过程恢复，增加了甲烷菌的相对丰度，将甲烷产量稳定在224±13 mL CH4/g VS，并将VFAs降低了约20%。因此，可以得出结论，单萜烯是具有相关潜在影响的化合物，必须仔细监测其在厌氧反应器中的累积水平。

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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.