通过组合式热液碳化和微生物燃料电池对食物垃圾沼渣进行初步处理以回收生物能源：生命周期影响比较评估†。

IF 9.3 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Green Chemistry Pub Date : 2024-10-22 DOI:10.1039/d4gc04081c

Shraddha Yadav , Manikanta M. Doki , Makarand M. Ghangrekar , Brajesh K. Dubey

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引用次数: 0

摘要

厌氧消化（AD）是将食物垃圾转化为生物甲烷的主要技术，但由此产生的沼渣的脱水和价值提升是一项重大的下游技术挑战。这项研究通过水热碳化（HTC）与厌氧消化的协同整合，为资源回收提供了一种先进的沼渣管理方法。集成系统产生了生物甲烷（∼466 mL g-1 VS）和高热值（∼22 MJ kg-1）的生物煤（水炭）。研究了包括反应温度和时间在内的 HTC 操作条件对煤化程度的影响。此外，利用微生物燃料电池（MFC）处理了 HTC 副产品（即 HTC 工艺水），有机物减排效率为 76.0 ± 4.6%，功率回收率为 ∼ 4.41 W m-3。此外，还进行了元基因组分析，以确认 MFC 中特定电原（梭状芽孢杆菌）的大量繁殖。与众不同的是，在这项工作中，使用生命周期评估对厌氧消化（AD）、厌氧消化（AD）+ 热电联产（HTC）和厌氧消化（AD）+ 热电联产（HTC）+ MFC 技术的 18 个不同类别对环境的影响进行了比较。单项评分结果表明，AD + HTC + MFC 集成系统对人类健康、生态系统和资源消耗的影响最小。这凸显了综合系统在实际应用、可持续沼渣管理和生物能源回收方面的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Postliminary treatment of food-waste digestate via combined hydrothermal carbonization and microbial fuel cell for bio-energy recovery: a comparative life cycle impact assessment†

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Postliminary treatment of food-waste digestate via combined hydrothermal carbonization and microbial fuel cell for bio-energy recovery: a comparative life cycle impact assessment†

Anaerobic digestion (AD) is the predominant technique for transforming food-waste into biomethane, yet the dewatering and valorisation of the resultant digestate present a significant downstream technical challenge. This investigation provides an advanced digestate management approach for resource recovery through the synergistic integration of hydrothermal carbonization (HTC) with anaerobic digestion. The integrated system resulted in biomethane (∼466 mL g⁻¹ VS) and biocoal (hydrochar) with a high calorific value (∼22 MJ kg⁻¹). The effect of HTC operating conditions including reaction temperature and time on the coalification degree has been investigated. Additionally, the by-product of HTC, i.e., HTC process water was treated using the microbial fuel cell (MFC) with organic abatement efficiency of 76.0 ± 4.6% and power recovery of ∼4.41 W m⁻³. Further, the metagenomic analysis was conducted to affirm the high proliferation of specific electrogens (Clostridia) in the MFC. Distinctively, in this work, the impacts on the environment in eighteen different categories using life cycle assessment for the technologies AD, AD + HTC, and AD + HTC + MFC were also compared. The single score results demonstrated the least impact of the integrated AD + HTC + MFC on human health, ecosystem, and resource depletion. This highlights the potential of the integrated system for real-field applicability, sustainable digestate management, and bioenergy recovery.

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来源期刊

Green Chemistry 化学-化学综合

CiteScore

16.10

自引率

7.10%

发文量

677

审稿时长

1.4 months

期刊介绍： Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.