Coffee grounds and fruit and vegetable waste co-digestion in dark Fermentation: Evaluation of mixing ratio and hybrid pretreatments impact on bio-hydrogen production

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy Pub Date : 2025-04-30 DOI:10.1016/j.biombioe.2025.107896

Achouri Ouafa , Derbal Kerroum , Panico Antonio , Righa Lamis , Bensegueni Chaima , Zerdazi-Zamouche Rania , Bencheikh-Lehocine Mossaab

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引用次数: 0

Abstract

Biohydrogen production using organic waste is gaining increasing interest due to its sustainable, efficient, and energy-efficient nature. Dark fermentation is one of the promising processes to produce this energy. This study explores the feasibility of dark fermentation co-digestion, specifically examining the combination of coffee grounds (CG) with fruit and vegetable wastes (FVW). Various ratios of FVW and CG co-digestion were examined under thermophilic and mesophilic conditions in the biochemical hydrogen potential test batch (BHP tests) to assess dark fermentation (DF) performance. An 80 % FVW and 20 % CG mixing ratio yielded optimal production at 517 mL bioH₂/g total volatile solids (TVS) at 55 °C, marking a 15.67 % increase compared to mono-digestion of FVW (447 mL bioH₂/gTVS) and a 137.15 % increase compared to mono-digestion of CG (218 mL bioH₂/gTVS). Under mesophilic conditions, the maximum production reached 415.45 mL bioH₂/gTVS with the 80 % FVW and 20 % CG ratio, showing a 5.44 % increase compared to FVW alone (394 mL bioH₂/gTVS) and a 108.55 % increase compared to CG (199.20 mL bioH₂/gTVS). The second phase of the study involved applying hybrid (thermal-alkaline) pretreatment to FVW and hydrothermal to CG. This pretreatment resulted in a 315 % increase in soluble chemical oxygen demand (SCOD) solubilization, consequently enhancing the overall bio-hydrogen yield by 17.5 %. A kinetic analysis, incorporating model fitting with three models (modified Gompertz model (GM), transference function (TF), and first-order model), was conducted to determine which model most accurately depicted the effect on the degradation rate and ultimate bioH₂ yield.

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暗发酵中咖啡渣与果蔬废弃物共消化：混合比例及混合预处理对生物产氢影响的评价

利用有机废物生产生物氢由于其可持续、高效和节能的性质而越来越受到关注。暗发酵是一种很有希望产生这种能量的方法。本研究探讨了暗发酵共消化的可行性，特别是研究了咖啡渣（CG）与水果和蔬菜废物（FVW）的结合。在生化氢势试验批次（BHP试验）中，在嗜热和中温条件下，研究了FVW和CG共消化的不同比例，以评估暗发酵（DF）的性能。80%的FVW和20%的CG混合比例在55°C下达到517 mL bioH2/g总挥发性固体（TVS）的最佳产量，与单消化FVW （447 mL bioH2/gTVS）相比增加了15.67%，与单消化CG （218 mL bioH2/gTVS）相比增加了137.15%。在中亲水性条件下，当FVW和CG的比例分别为80%和20%时，生物h2 /gTVS的最大产量为415.45 mL，比FVW （394 mL）提高了5.44%，比CG （199.20 mL）提高了108.55%。研究的第二阶段涉及将混合（热碱性）预处理用于FVW和水热预处理用于CG。该预处理使可溶性化学需氧量（SCOD）增溶率提高了315%，从而使总生物产氢率提高了17.5%。采用三种模型（修正Gompertz模型（GM）、传递函数（TF）和一阶模型）拟合模型，进行动力学分析，以确定哪种模型最准确地描述了对降解速率和最终生物h2产量的影响。

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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.