Effects of salinity on anaerobic digestion: Performance, microbial physiology, and community dynamics

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-05-04 DOI:10.1016/j.biortech.2025.132619

Chongxin Qian , Shanying He , Xiang Li , Shaohua Wu , Dexin Wang , Chunping Yang

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Abstract

Anaerobic digestion (AD) is widely applied to treatment and energy recovery from organic wastewater/wastes, while the efficiency of AD can be limited by salinity stress. This paper reviews the effects of salinity on AD. First of all, the effects of salinity on AD performance were compared, revealing that methane production is more susceptible to salinity stress. Secondly, the influence of salinity on microbial physiology and intracellular molecules was examined, demonstrating that salinity stress reduces the activity of key enzymes and increases the concentration of extracellular polymeric substances during AD. Thirdly, variations in microbial community structure under salinity stress were discussed, with archaeal communities showing more significant restructuring, including reduced dominance of acetoclastic methanogens. At last, strategies to mitigate salinity inhibition were presented, along with prospects for future research directions. This review provides theoretical guidance for engineering applications and strategies for enhancing AD in treating saline substrates.

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盐度对厌氧消化的影响：性能、微生物生理学和群落动态

厌氧消化（AD）技术广泛应用于有机废水/废物的处理和能量回收，但其效率受到盐度胁迫的限制。本文综述了盐度对AD的影响。首先，比较了盐度对AD性能的影响，发现甲烷产量更容易受到盐度胁迫的影响。其次，研究了盐度对微生物生理和细胞内分子的影响，表明盐度胁迫降低了AD期间关键酶的活性，增加了细胞外聚合物物质的浓度。第三，讨论了盐碱胁迫下微生物群落结构的变化，古细菌群落表现出更明显的重组，包括醋酸破菌产甲烷菌的优势降低。最后，提出了减轻盐度抑制的策略，并对今后的研究方向进行了展望。本文综述为提高AD处理盐碱基质的工程应用和策略提供了理论指导。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.