Direct interspecies electron transfer mechanisms of a biochar-amended anaerobic digestion: a review

Biotechnology for Biofuels and Bioproducts

Review

Andrzej Białowiec¹  Marvin T. Valentin²  Gang Luo³  Shicheng Zhang³ 

[1] Department of Applied Bioeconomy, Wrocław University of Environmental and Life Sciences, 51-630, Wroclaw, Poland;Department of Agricultural and Biosystems Engineering, Iowa State University, 605 Bissell Road, 50011, Ames, IA, USA;Department of Applied Bioeconomy, Wrocław University of Environmental and Life Sciences, 51-630, Wroclaw, Poland;Department of Science and Technology, Engineering and Industrial Research, National Research Council of the Philippines, Taguig, Philippines;Benguet State University, Km. 5, La Trinidad, 2601, Benguet, Philippines;Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, 200433, Shanghai, China;Shanghai Technical Service Platform for Pollution Control and Resource Utilization of Organic Wastes, 200438, Shanghai, China;Shanghai Institute of Pollution Control and Ecological Security, 200092, Shanghai, China;

关键词: DIET;    Biochar;    Mechanisms;    Biomass;    Biogas;    Anaerobic;    Syntrophic;   

DOI  :  10.1186/s13068-023-02391-3

 received in 2022-08-15, accepted in 2023-09-09,  发布年份 2023

来源: Springer

【 摘 要 】

This paper explores the mechanisms of biochar that facilitate direct interspecies electron transfer (DIET) among syntrophic microorganisms leading to improved anaerobic digestion. Properties such as specific surface area (SSA), cation exchange capacity (CEC), presence of functional groups (FG), and electrical conductivity (EC) were found favorable for increased methane production, reduction of lag phase, and adsorption of inhibitors. It is revealed that these properties can be modified and are greatly affected by the synthesizing temperature, biomass types, and residence time. Additionally, suitable biochar concentration has to be observed since dosage beyond the optimal range can create inhibitions. High organic loading rate (OLR), pH shocks, quick accumulation and relatively low degradation of VFAs, and the presence of heavy metals and toxins are the major inhibitors identified. Summaries of microbial community analysis show fermentative bacteria and methanogens that are known to participate in DIET. These are Methanosaeta, Methanobacterium, Methanospirillum, and Methanosarcina for the archaeal community; whereas, Firmicutes, Proteobacteria, Synergistetes, Spirochetes, and Bacteroidetes are relatively for bacterial analyses. However, the number of defined cocultures promoting DIET is very limited, and there is still a large percentage of unknown bacteria that are believed to support DIET. Moreover, the instantaneous growth of participating microorganisms has to be validated throughout the process.Graphical abstract

【 授权许可】

CC BY   
© BioMed Central Ltd., part of Springer Nature 2023

【 图 表 】

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