Recent Advances in Applying Nanobubbles for Enhanced Anaerobic Digestion: Fundamentals, Challenges, and Future Prospects

IF 3 3区工程技术 Q3 ENERGY & FUELS

BioEnergy Research Pub Date : 2025-09-30 DOI:10.1007/s12155-025-10889-x

Alsayed Mostafa, Ahmed Elsayed, Rasha Maal-Bared, Elsayed Elbeshbishy, Bipro Ranjan Dhar

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Abstract

In recent years, the use of nanobubbles (NBs) in anaerobic digestion (AD) has received significant research attention, with numerous studies reporting notable improvements in AD efficiency when nanobubble water (NBW) is introduced in digesters. The improvements are often attributed to more efficient substrate degradation, higher activity of key enzymes, and the more complex and diverse microbial communities associated with NBW-integrated AD. Despite these promising results, detailed explanations of the mechanisms and modes of action behind NBW, particularly its impact on each step of the AD process—hydrolysis, acidogenesis, acetogenesis, methanogenesis—are still limited. This paper aims to provide a comprehensive review and critical assessment of NBW’s impacts on AD, with a particular focus on how operational conditions can influence NBW-related effects on AD performance. Finally, energy efficiencies, future opportunities and challenges of expanding NB technology to boost AD efficiency are discussed.

Graphical Abstract

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应用纳米气泡增强厌氧消化的最新进展：基础，挑战和未来展望

近年来，纳米气泡（NBs）在厌氧消化（AD）中的应用受到了广泛的研究关注，许多研究报道了在沼气池中引入纳米气泡水（NBW）可显著提高厌氧消化（AD）效率。这种改善通常归因于更有效的底物降解，关键酶的活性更高，以及与nbw整合AD相关的更复杂和多样化的微生物群落。尽管有这些令人鼓舞的结果，但NBW背后的机制和作用模式的详细解释，特别是它对AD过程的每个步骤——水解、产酸、产丙酮、产甲烷——的影响仍然有限。本文旨在全面回顾和批判性评估NBW对AD的影响，特别关注操作条件如何影响NBW对AD性能的相关影响。最后，讨论了能源效率，扩展NB技术以提高AD效率的未来机遇和挑战。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

BioEnergy Research ENERGY & FUELS-ENVIRONMENTAL SCIENCES

CiteScore

6.70

自引率

8.30%

发文量

174

审稿时长

3 months

期刊介绍： BioEnergy Research fills a void in the rapidly growing area of feedstock biology research related to biomass, biofuels, and bioenergy. The journal publishes a wide range of articles, including peer-reviewed scientific research, reviews, perspectives and commentary, industry news, and government policy updates. Its coverage brings together a uniquely broad combination of disciplines with a common focus on feedstock biology and science, related to biomass, biofeedstock, and bioenergy production.