Advances in microbial community, mechanisms and stimulation effects of direct interspecies electron transfer in anaerobic digestion

IF 12.1 1区 工程技术 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
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Abstract

Anaerobic digestion (AD) has been proven to be an effective green technology for producing biomethane while reducing environmental pollution. The interspecies electron transfer (IET) processes in AD are critical for acetogenesis and methanogenesis, and these IET processes are carried out via mediated interspecies electron transfer (MIET) and direct interspecies electron transfer (DIET). The latter has recently become a topic of significant interest, considering its potential to allow diffusion-free electron transfer during the AD process steps. To date, different multi-heme c-type cytochromes, electrically conductive pili (e-pili), and other relevant accessories during DIET between microorganisms of different natures have been reported. Additionally, several studies have been carried out on metagenomics and metatranscriptomics for better detection of DIET, the role of DIET's stimulation in alleviating stressed conditions, such as high organic loading rates (OLR) and low pH, and the stimulation mechanisms of DIET in mixed cultures and co-cultures by various conductive materials. Keeping in view this significant research progress, this study provides in-depth insights into the DIET-active microbial community, DIET mechanisms of different species, utilization of various approaches for stimulating DIET, characterization approaches for effectively detecting DIET, and potential future research directions. This study can help accelerate the field's research progress, enable a better understanding of DIET in complex microbial communities, and allow its utilization to alleviate various inhibitions in complex AD processes.

Abstract Image

厌氧消化过程中微生物群落、种间直接电子传递机制和刺激效应的研究进展。
厌氧消化(AD)已被证明是一种有效的绿色技术,可在生产生物甲烷的同时减少环境污染。厌氧消化中的种间电子传递(IET)过程对于乙酸生成和甲烷生成至关重要,这些IET过程是通过介导种间电子传递(MIET)和直接种间电子传递(DIET)进行的。考虑到直接种间电子传递具有在厌氧消化(AD)过程中实现无扩散电子传递的潜力,它最近成为了一个备受关注的话题。迄今为止,已有关于不同性质的微生物之间在直接种间电子传递过程中的不同多血红素c型细胞色素、导电纤毛(e-pili)和其他相关配件的报道。此外,为更好地检测 DIET,对元基因组学和元转录组学、DIET 在缓解高有机负荷率(OLR)和低 pH 值等压力条件下的刺激作用,以及各种导电材料在混合培养和共培养中对 DIET 的刺激机制等方面也开展了多项研究。鉴于这一重大研究进展,本研究深入探讨了具有 DIET 活性的微生物群落、不同物种的 DIET 机制、利用各种方法刺激 DIET、有效检测 DIET 的表征方法以及潜在的未来研究方向。所有这些都有助于加快该领域的研究进展,使人们更好地了解复杂微生物群落中的 DIET,并利用其缓解复杂厌氧消化过程中的各种抑制作用。
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来源期刊
Biotechnology advances
Biotechnology advances 工程技术-生物工程与应用微生物
CiteScore
25.50
自引率
2.50%
发文量
167
审稿时长
37 days
期刊介绍: Biotechnology Advances is a comprehensive review journal that covers all aspects of the multidisciplinary field of biotechnology. The journal focuses on biotechnology principles and their applications in various industries, agriculture, medicine, environmental concerns, and regulatory issues. It publishes authoritative articles that highlight current developments and future trends in the field of biotechnology. The journal invites submissions of manuscripts that are relevant and appropriate. It targets a wide audience, including scientists, engineers, students, instructors, researchers, practitioners, managers, governments, and other stakeholders in the field. Additionally, special issues are published based on selected presentations from recent relevant conferences in collaboration with the organizations hosting those conferences.
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