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Roles and opportunities of quorum sensing in natural and engineered anaerobic digestion systems
Water Research ( IF 11.4 ) Pub Date : 2025-01-22 , DOI: 10.1016/j.watres.2025.123190
Xuran Liu, Jianying Luo, Qing Xu, Qi Lu, Bing-Jie Ni, Dongbo Wang

Anaerobic digestion (AD) is a biological process in which anaerobic microorganisms convert organic matter into methane-rich gas, contributing to the cycling of carbon and other nutrients. Quorum sensing (QS), a microbial communication mechanism, plays a critical role in regulating population-level behaviors within AD systems. This review systematically examines the roles and applications of QS in AD, emphasizing its importance in enhancing process efficiency. The review begins by exploring the pathways and characteristics of QS in key functional microorganisms involved in AD. We analyze the response mechanisms of QS to key environmental variables and their effects on the structure and function of microbe communities and extracellular polymeric substances secretion. Potential applications of QS in engineered AD systems are discussed, with a focus on promoting system startup, improving operational efficiency, and enhancing resistance and stability. The use of exogenous signaling molecules and quorum quenching reagents to optimize AD performance is also evaluated. Additionally, the ecological significance of QS in natural environments, such as seafloor sediments and wetlands, is explored, emphasizing its role in regulating AD-related microorganisms within complex microbial communities. Finally, the review identifies current knowledge gaps and outlines future research directions in AD, including QS database development, QS-engineered bacteria excavation, and advanced analytical methods assistants. This comprehensive review aims to bridge existing gaps in QS-related knowledge in AD and provide fresh perspectives for studying microbial communication and collaboration through QS.

中文翻译:


群体感应在自然和工程厌氧消化系统中的作用和机遇



厌氧消化 (AD) 是一种生物过程,其中厌氧微生物将有机物转化为富含甲烷的气体,有助于碳和其他营养物质的循环。群体感应 (QS) 是一种微生物通讯机制,在调节 AD 系统内的种群水平行为中起着关键作用。本文系统地研究了 QS 在 AD 中的作用和应用,强调了其在提高过程效率方面的重要性。综述首先探讨了 QS 在 AD 涉及的关键功能微生物中的途径和特征。我们分析了 QS 对关键环境变量的响应机制及其对微生物群落结构和功能以及细胞外聚合物物质分泌的影响。讨论了 QS 在工程 AD 系统中的潜在应用,重点是促进系统启动、提高运营效率以及增强阻力和稳定性。还评估了使用外源信号分子和群体猝灭试剂来优化 AD 性能。此外,还探讨了 QS 在自然环境(如海底沉积物和湿地)中的生态意义,强调了其在调节复杂微生物群落中与 AD 相关的微生物中的作用。最后,综述确定了当前的知识差距并概述了 AD 的未来研究方向,包括 QS 数据库开发、QS 工程细菌挖掘和高级分析方法助手。本综述旨在弥合 AD 中 QS 相关知识的现有差距,并为通过 QS 研究微生物传播和协作提供新的视角。
更新日期:2025-01-22
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