Promotion of direct interspecies electron transfer and potential impact of conductive materials in anaerobic digestion and its downstream processing - a critical review

Nguyen, Dinh Duc; Vu, Minh T.; Johir, M.A.H.; Pernice, Mathieu; Ngo, Huu‐Hao; Zdarta, Jakub; Jesionowski, Teofil; Nghiem, Long D.

doi:10.1016/j.biortech.2021.125847

Cited by 39 publications

(26 citation statements)

References 67 publications

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“…As a nanoparticulate, iron-based, conductive material, sponge iron can directly accelerate the direct interspecies electron transfer (DIET) [ 27 ]. The DIET is a syntrophic metabolism in which free electrons flow from one cell into another through shared electrical connections without the requirement of reduced electron carriers [ 28 ]. The SRAO is also an electron transfer process, in which the electron transfer is essential for the substances participating in the reaction, where SO 4 2− and NH 4 + act as an electron acceptor and electron donor, respectively.…”

Section: Resultsmentioning

confidence: 99%

Applications of Sponge Iron and Effects of Organic Carbon Source on Sulfate-Reducing Ammonium Oxidation Process

Zhu

Shidong

Wang

et al. 2022

IJERPH

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The typical characteristics of wastewater produced from seafood, chemical, textile, and paper industries are that it contains ammonia, sulfate, and a certain amount of chemical oxygen demand (COD). The sulfate-reducing ammonium oxidation process is a biochemical reaction that allows both ammonia and sulfate removal, but its low growth rate and harsh reaction conditions limit its practical application. Due to the adsorption properties of the iron sponge and its robust structure, it provides a suitable living environment for microorganisms. To reduce the negative impact on the environment, we employed 4.8 kg of sponge iron in a 2.0 dm3 anaerobic sequencing batch reactor (ASBR). We investigated the effects of the type and concentration of carbon sources on the performance of the sulfate-reducing ammonium oxidation (SRAO) process. The results demonstrated that during a start-up period of 90 days, the average ammonium removal efficiency and the sulfate conversion efficiency of the reactor containing the sponge iron were 4.42% and 8.37% higher than those of the reactor without the sponge iron. The addition of the sponge iron shortens the start-up time of this greenhouse gas-free denitrification process and reduces future costs in practical applications. The removal of total nitrogen (TN) significantly increased after adding organic carbon sources and then declined sharply, while the most considerable reduction of ammonium removal efficiency from 98.4% to 30.5% was observed with adding phenol. The performance of the group employing glucose as the carbon source was recovered on the 28th day, with the average ammonium removal efficiency increasing from 49.03% to 83.5%. The results of this simulation study will help the rapid start-up of SRAO in the water treatment industry and can precisely guide the application of the SRAO process for wastewater containing different organic carbon sources.

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Section: Resultsmentioning

confidence: 99%

Applications of Sponge Iron and Effects of Organic Carbon Source on Sulfate-Reducing Ammonium Oxidation Process

Zhu

Shidong

Wang

et al. 2022

IJERPH

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“…The realization of DIET methanogenic pathway no longer entirely rely on biological tools such as e-pili or OmcS because of the presence of conductive materials ( Chen et al, 2014b ; Xu et al, 2019 ). Further, the addition of conductive materials enriches microorganisms with an extracellular electron transfer ability ( Nguyen et al, 2021 ). It can be speculated that these microorganisms may participate in different stages of anaerobic digestion ( Figure 1 ), making it possible to develop the DIET pathway in methanogenic systems with different substrates ( Yin and Wu, 2019 ; Li et al, 2021 ).…”

Section: Establishment Of Direct Interspecies Electron Transfer In An...mentioning

confidence: 99%

“…Furthermore, the impacts of conductive material discharge on ecological environment and downstream processing should be valued. Currently, there are few studies on the influence of adding conductive materials to anaerobic digestion system on sludge dewatering ( Nguyen et al, 2021 ). Obviously, addition of conductive materials significantly increases the amount of biosolids ( Chen S. et al, 2020 ; Yuan et al, 2021 ), which increases the cost of solid waste transportation and treatment in the later stage.…”

Section: Challenges Of Direct Interspecies Electron Transfer In Anaer...mentioning

confidence: 99%

“…DIET mediated by conductive materials has been successfully applied to anaerobic digestion systems with different substrates over the years. As of late, several corresponding reviews have been published, elaborating the importance and advantages of DIET mediated by conductive materials ( Barua and Dhar, 2017 ; Baek et al, 2018 ; Martins et al, 2018 ; Park et al, 2018a ; Xu et al, 2019 ; Gahlot et al, 2020 ; Nguyen et al, 2021 ). However, there are few reviews on comprehensively summarizing the mechanisms of DIET and the effects of DIET mediated by conductive materials on anaerobic digestion performances.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, limited substrates and microorganisms have been proved to be involved in DIET, and some substrates and microorganisms are only speculated to be involved in DIET according to anaerobic digestion performance improvement and microbial characteristics. Furthermore, the negative impacts of conductive materials on downstream processing, ecological environment, and anaerobic digestion performance restrict the practical application of DIET ( Nguyen et al, 2021 ). Therefore, a review of literatures on mechanisms, performances, and challenges of DIET improvement via adding conductive materials in anaerobic digestion are imperative for a better vision in the practical application.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of Direct Interspecies Electron Transfer via Adding Conductive Materials in Anaerobic Digestion: Mechanisms, Performances, and Challenges

Fang

Chang

et al. 2022

Front. Microbiol.

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Anaerobic digestion is an effective and sustainable technology for resource utilization of organic wastes. Recently, adding conductive materials in anaerobic digestion to promote direct interspecies electron transfer (DIET) has become a hot topic, which enhances the syntrophic conversion of various organics to methane. This review comprehensively summarizes the recent findings of DIET mechanisms with different mediating ways. Meanwhile, the influence of DIET on anaerobic digestion performance and the underlying mechanisms of how DIET mediated by conductive materials influences the lag phase, methane production, and system stability are systematically explored. Furthermore, current challenges such as the unclear biological mechanisms, influences of non-DIET mechanisms, limitations of organic matters syntrophically oxidized by way of DIET, and problems in practical application of DIET mediated by conductive materials are discussed in detail. Finally, the future research directions for practical application of DIET are outlined.

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Anaerobic Digestion Process and Biogas Production

Wei,

Zhao,

Feng

et al. 2023

Biogas Plants

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Promotion of direct interspecies electron transfer and potential impact of conductive materials in anaerobic digestion and its downstream processing - a critical review

Cited by 39 publications

References 67 publications

Applications of Sponge Iron and Effects of Organic Carbon Source on Sulfate-Reducing Ammonium Oxidation Process

Applications of Sponge Iron and Effects of Organic Carbon Source on Sulfate-Reducing Ammonium Oxidation Process

Improvement of Direct Interspecies Electron Transfer via Adding Conductive Materials in Anaerobic Digestion: Mechanisms, Performances, and Challenges

Anaerobic Digestion Process and Biogas Production

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