Factors affecting the efficiency of a bioelectrochemical system: a review

Zhang, Xiaolin; Li, Xiaojing; Zhao, Xiaodong; Li, Yongtao

doi:10.1039/c9ra03605a

Cited by 84 publications

(18 citation statements)

References 129 publications

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“…This suggested that the available nitrogen in the soils was vital for the amount and activity of key bacteria, 27,29 which needs to be further considered. However, EC did not play the supposed role because of few differences in the one‐type soil 50 . For the beta‐diversity, the bacterial community of the cathodic soil or the anodic soil in C was different from that in other treatments, and there was a small difference between OC and Ca, which were obviously different from those in An (Figure S4).…”

Section: Resultsmentioning

confidence: 95%

“…However, EC did not play the supposed role because of few differences in the one-type soil. 50 For the beta-diversity, the bacterial community of the cathodic soil or the anodic soil in C was different from that in other treatments, and there was a small difference between OC and Ca, which were obviously different from those in An ( Figure S4). Furthermore, the bacterial communities in the soils near the anode were clearly clustered, as they were in the soils near the cathode ( Figure S5).…”

Section: Relationships Between Bacterial Abundance and Soil Propertiesmentioning

confidence: 90%

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Effect of introduced‐electrode on phenanthrene degradation in the soil microbial electrochemical remediation

Zhang

Chen

et al. 2020

Int J Energy Res

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Summary Soil microbial electrochemical remediation (MER) provides an inexhaustible electron acceptor (solid anode) to oxidize organic pollutants in soils where electron acceptors are generally limited. Simultaneously, bioelectricity recovery is directly implemented from the degradation of organic pollutants which is in turn accelerated by biocurrent stimulation. However, it has not been a concern in previous reports that the removal rates of open‐circuit groups (OC) are significantly higher than non‐electrode controls. Thus, the reasons for the enhanced degradation after the introduction of single or two electrodes were focused in this study. The removal rate of typical polycyclic aromatic hydrocarbon phenanthrene was higher in the closed‐circuit soil MER than OC, with an electricity conversion efficiency of 12 ± 1 C∙mg−1 phenanthrene. The removal was 21‐39% higher (P < 0.05) in soils near the cathodic position and adjacent to the water layer of upper surface, suggesting that the cathode even contributed more to phenanthrene degradation than the anode. The profile of power production showed two peaks with the maximum values of 84 ± 4 mA∙m−2 on days 0‐26 and 70 ± 1 mA∙m−2 on days 27‐100, respectively. Afterward, more phenanthrene (26‐34 mg∙kg−1, P < 0.05) was removed in OC compared to closed‐circuit systems (1‐17 mg∙kg−1). However, in reactors with only a single electrode, a separate anode played a stronger enhanced effect on the degradation of phenanthrene than a separate cathode. These results were due to an increment of 128‐425 OTUs on the surface of electrodes, for example, the relative abundance of Bacillus increased from 14.27% to 44.98%. Overall, the configuration with both electrodes contacting with the polluted matrix (eg, soils or sediments) is superior in terms of the remediation efficiency to that with one electrode (ie, anode), which provided a guidance of the MER application.

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Section: Resultsmentioning

confidence: 95%

Section: Relationships Between Bacterial Abundance and Soil Propertiesmentioning

confidence: 90%

Effect of introduced‐electrode on phenanthrene degradation in the soil microbial electrochemical remediation

Zhang

Chen

et al. 2020

Int J Energy Res

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“…Jafary et al were able to accomplish desalination of seawater at the rate of 24.3 mg h −1 with the COD removal efficiency of 85% using MDC employing carbon-based electrodes (Jafary et al, 2020). Carbon felt, carbon paper, and graphite electrodes are generally used in MDC, which yielded unsatisfactory performance due to the drawbacks, like low specific surface area, unconducive surface for biofilm formation, low flexibility, and cumbersome maintenance procedures (Pant et al, 2010;Zhang et al, 2019b). Goren and Okten applied a novel 3D carbonaceous electrode for the treatment of geothermal water containing boron and attained 55.5% removal efficiency for boron with simultaneous 91.5% of COD removal in addition to the generation of 9.04 mW m −3 of power density, thus affirming the efficacy of 3D electrodes for application in MDC (Goren and Okten, 2021b).…”

Section: Removal Of Organic Inorganic Compound and Other Suspended And Volatile Mattersmentioning

confidence: 99%

A Sustainable Approach for the Production of Green Energy With the Holistic Treatment of Wastewater Through Microbial Electrochemical Technologies: A Review

2021

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With the plausible depletion of fossil fuels in the near future and its associated environmental impacts, researchers have instigated the search for eco-friendly renewable bioenergy. Moreover, the increase in water pollution by industrial and anthropogenic activities is another alarming global concern. In this regard, the production of renewable and sustainable green bioenergy utilizing wastewater through microbial electrochemical technologies (METs) can alleviate these crucial problems by providing a sustainable solution to meet both the demands of energy and fresh water supply. Moreover, different bio-centered techniques such as nitrification and denitrification for nitrogen removal, and elimination of carcinogenic metals, pathogens, and organic components utilizing microbiota followed by toxicity sensing of different pollutants have been efficaciously exhibited through METs. However, inferior bioenergy production and recovery of low biomass yield in METs with high operational cost are noteworthy bottlenecks that hinder the scalability of this technology. Therefore, this review elaborates different physicochemical factors affecting the performance of METs, microbial interaction for the development of stable biofilm and so forth. Moreover, a broad overview on the production of bioenergy, along with the removal of pollutants from wastewater through different types of METs are also highlighted. Furthermore, the production of biofuels like ethanol, methanol, biodiesel, and gaseous fuel like bio-H2 coupled with power generation using photosynthetic microorganisms via CO2 sequestration through METs are also discussed. Additionally, recent developments with future scope for the field-scale implementation of METs along with their bottlenecks have been discussed, which has not been critically reviewed to date.

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“…or Pseudomonas spp. [9,10,13]. Therefore, it can be assumed that the paddy soil used in this study contained the same species.…”

Section: Characterization Of Anode Surface Morphology and Biofilm Formationmentioning

confidence: 99%

“…On the other hand, microorganisms that exist in the soil play a key role in electricity generation and are affected by the initial soil physicochemical properties such as pH, temperature, moisture content, conductivity, nutrient ions, growth factors, and soil porosity [9].…”

Section: Introductionmentioning

confidence: 99%

A Novel Design Portable Plugged-Type Soil Microbial Fuel Cell for Bioelectricity Generation

Nguyen

Taguchi

2021

Energies

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Soil microbial fuel cells (SMFCs) are a promising cost-effective power source for on-demand electricity generation applications. So far, reported SMFC configurations are usually bulky and hard to setup. In this study, a low-cost portable plugged-type SMFC (PSMFC) was designed and fabricated for on-demand micropower generation. The PSMFC can be activated just by plugging into natural wet soil, which is easy to access in the natural condition. The PSMFC uses carbon-based electrodes for cost-effectiveness. After setting the PSMFC into the soil to activate, it started to produce electricity after 1 h and reached the power density of 7.3 mW/m2 after 48 h. The proposed PSMFC can potentially generate electricity for remote sensors or soil sensing systems.

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Factors affecting the efficiency of a bioelectrochemical system: a review

Abstract: The great potential of bioelectrochemical systems (BESs) in pollution control combined with energy recovery has attracted increasing attention.

Cited by 84 publications

References 129 publications

Effect of introduced‐electrode on phenanthrene degradation in the soil microbial electrochemical remediation

Effect of introduced‐electrode on phenanthrene degradation in the soil microbial electrochemical remediation

A Sustainable Approach for the Production of Green Energy With the Holistic Treatment of Wastewater Through Microbial Electrochemical Technologies: A Review

A Novel Design Portable Plugged-Type Soil Microbial Fuel Cell for Bioelectricity Generation

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