Polarized electrode enhances biological direct interspecies electron transfer for methane production in upflow anaerobic bioelectrochemical reactor

Feng, Qing; Song, Young-Chae; Yoo, Kyuseon; Kuppanan, Nanthakumar; Subudhi, Sanjukta; Lal, Banwari

doi:10.1016/j.chemosphere.2018.03.163

Cited by 28 publications

(24 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the significant impact was observed at higher OLRs [29]. Another research group highlighted that the electrode polarization could boost volumetric CH 4 production and CH 4 content by 53% and 20.6%, respectively [19]. This implies that EV application can be the key for various merits in AD.…”

Section: Electrical Energy Input As Tool For Diet Pathway Stimulationmentioning

confidence: 99%

“…Through the studies of last ten years, it was found that DIET reaction could be stimulated either by the supplementation of a conductive material (CM) and/or applying external voltage (EV) ( Figure 2) [17][18][19][20]. Basically, EAB can oxidize organics, and then the released electrons are directly transferred through the extracellular cytochromes or the e-pili of EAB to methanogens, which reduce CO 2 into CH 4 [12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Anaerobic Digestion by Stimulating DIET Reaction

Mostafa

Song

et al. 2020

Processes

Self Cite

View full text Add to dashboard Cite

Since the observation of direct interspecies electron transfer (DIET) in anaerobic mixed cultures in 2010s, the topic “DIET-stimulation” has been the main route to enhance the performance of anaerobic digestion (AD) under harsh conditions, such as high organic loading rate (OLR) and the toxicants’ presence. In this review article, we tried to answer three main questions: (i) What are the merits and strategies for DIET stimulation? (ii) What are the consequences of stimulation? (iii) What is the mechanism of action behind the impact of this stimulation? Therefore, we introduced DIET history and recent relevant findings with a focus on the theoretical advantages. Then, we reviewed the most recent articles by categorizing how DIET reaction was stimulated by adding conductive material (CM) and/or applying external voltage (EV). The emphasis was made on the enhanced performance (yield and/or production rate), CM type, applied EV, and mechanism of action for each stimulation strategy. In addition, we explained DIET-caused changes in microbial community structure. Finally, future perspectives and practical limitations/chances were explored in detail. We expect this review article will provide a better understanding for DIET pathway in AD and encourage further research development in a right direction.

show abstract

Section: Electrical Energy Input As Tool For Diet Pathway Stimulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced Anaerobic Digestion by Stimulating DIET Reaction

Mostafa

Song

et al. 2020

Processes

Self Cite

View full text Add to dashboard Cite

show abstract

“…The oxidation current was 0.42 mA at 0.36 V (vs. Ag/AgCl) of oxidation potential ( Table 3). The higher oxidation current implies the electroactive bacteria are well enriched and activated in the bioelectrochemical reactor, further facilitating the DIET pathways for methane production [38,39]. However, in the control reactor, the oxidation current was only 0.15 mA at 0.35 V (vs. Ag/AgCl) of oxidation potential (Table 3).…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

Bioelectrochemical Methane Production from Food Waste in Anaerobic Digestion Using a Carbon-Modified Copper Foam Electrode

Feng

Zhao

et al. 2020

Processes

Self Cite

View full text Add to dashboard Cite

Anaerobic bioelectrochemical digestion (ABD) is widely used for treating wastewater and recovering energy. The electrode is the key point for ABD system, which was sparsely studied with food waste. In this study, a carbon-modified copper foam was fabricated with copper foam and multiple wall carbon nanotubes (MWCNT) through electrophoretic deposition and screen-printing methods. The carbon-modified copper foam electrode was investigated in an ABD reactor for food waste. The features of bioelectrochemical methane production, process stability, and electrochemical characterization were evaluated in the ABD reactor, and were compared to the control reactor without equipping electrode. The ultimate methane production reached 338.1 mL CH4/L in the ABD reactor, which was significantly higher than the 181.0 mL CH4/L of the control reactor. The methane produced from the electrode was 137.8 mL CH4/L, which was up to 40.8% of total methane production in the ABD reactor. It was attributed to the electroactive bacteria that were enriched and activated by the carbon-modified copper foam electrode, further activating the direct interspecies electron transfer (DIET) pathways for methane production. The cyclic voltammetry (CV) analysis showed higher redox peaks, which is one of the pieces of evidence for the enrichment of electroactive bacteria. The carbon-modified copper foam electrode has the advantages of both carbon and metal materials, and demonstrated a high possibility for use in bioelectrochemical methane production for food waste.

show abstract

“…In a bioelectrochemical anaerobic reactor, the electroactive microorganisms, including exoelectrogenic fermentation bacteria (EFB) and electrotrophic methanogenic archaea (EMA), are enriched on the surfaces of the polarized electrode [15][16][17]. The electroactive microorganisms can donate or accept electrons to the outside of the cell through the cytochrome C or conductive pili that extend to the outer membrane of the cell [7,18]. EMA are microorganisms that produce methane by directly accepting the electrons from the EFB and then reduce carbon dioxide [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…EMA are microorganisms that produce methane by directly accepting the electrons from the EFB and then reduce carbon dioxide [15,16]. Recently, it has been revealed that EFB and EMA can be enriched not only on the electrode surface, but also in the bulk solution [15,18]. The electrons can be directly transferred between the interspecies of the EFB and EMA through the electrode, conductive materials, and direct contact [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Bioelectrochemical Enhancement of Biogenic Methane Conversion of Coal

2018

Self Cite

View full text Add to dashboard Cite

This study demonstrated the enhancement of biogenic coal conversion to methane in a bioelectrochemical anaerobic reactor with polarized electrodes. The electrode with 1.0 V polarization increased the methane yield of coal to 52.5 mL/g lignite, which is the highest value reported to the best of our knowledge. The electrode with 2.0 V polarization shortened the adaptation time for methane production from coal, although the methane yield was slightly less than that of the 1.0 V electrode. After the methane production from coal in the bioelectrochemical reactor, the hydrolysis product, soluble organic residue, was still above 3600 mg chemical oxygen demand (COD)/L. The hydrolysis product has a substrate inhibition effect and inhibited further conversion of coal to methane. The dilution of the hydrolysis product mitigates the substrate inhibition to methane production, and a 5.7-fold dilution inhibited the methane conversion rate by 50%. An additional methane yield of 55.3 mL/g lignite was obtained when the hydrolysis product was diluted 10-fold in the anaerobic toxicity test. The biogenic conversion of coal to methane was significantly improved by the polarization of the electrode in the bioelectrochemical anaerobic reactor, and the dilution of the hydrolysis product further improved the methane yield.

show abstract

Polarized electrode enhances biological direct interspecies electron transfer for methane production in upflow anaerobic bioelectrochemical reactor

Cited by 28 publications

References 34 publications

Enhanced Anaerobic Digestion by Stimulating DIET Reaction

Enhanced Anaerobic Digestion by Stimulating DIET Reaction

Bioelectrochemical Methane Production from Food Waste in Anaerobic Digestion Using a Carbon-Modified Copper Foam Electrode

Bioelectrochemical Enhancement of Biogenic Methane Conversion of Coal

Contact Info

Product

Resources

About