Important Role of Abiotic Sulfide Oxidation in Microbial Fuel Cells Treating High-Sulfate Wastewater

Niyom, Witchayut; Komolyothin, Decharthorn; Suwannasilp, Benjaporn Boonchayaanant

doi:10.4186/ej.2018.22.4.23

Cited by 7 publications

(2 citation statements)

References 19 publications

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“…In addition, the higher abundance of MG and SRB in M2H indicated that organic removal in M2H was mainly associated with methanogenesis and sulfate reduction. An increase in OLR with a high COD-to-sulfate ratio promoted the growth of MG and SRB, resulting in low electricity generation [ 46 ]. The increase in MG such as Methanosarcina (OTU00302) and Methanobacterium (OTU00346), which can utilize acetate and H 2 as substrates, enhanced the utilization of organic substances in PWW for methane production.…”

Section: Resultsmentioning

confidence: 99%

Optimization of microbial fuel cell performance application to high sulfide industrial wastewater treatment by modulating microbial function

Sriwichai,

Sangcharoen,

Saithong

et al. 2024

PLoS ONE

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Microbial fuel cells (MFCs) are innovative eco-friendly technologies that advance a circular economy by enabling the conversion of both organic and inorganic substances in wastewater to electricity. While conceptually promising, there are lingering questions regarding the performance and stability of MFCs in real industrial settings. To address this research gap, we investigated the influence of specific operational settings, regarding the hydraulic retention time (HRT) and organic loading rate (OLR) on the performance of MFCs used for treating sulfide-rich wastewater from a canned pineapple factory. Experiments were performed at varying hydraulic retention times (2 days and 4 days) during both low and high seasonal production. Through optimization, we achieved a current density generation of 47±15 mA/m2, a COD removal efficiency of 91±9%, and a sulfide removal efficiency of 86±10%. Microbiome analysis revealed improved MFC performance when there was a substantial presence of electrogenic bacteria, sulfide-oxidizing bacteria, and methanotrophs, alongside a reduced abundance of sulfate-reducing bacteria and methanogens. In conclusion, we recommend the following operational guidelines for applying MFCs in industrial wastewater treatment: (i) Careful selection of the microbial inoculum, as this step significantly influences the composition of the MFC microbial community and its overall performance. (ii) Initiating MFC operation with an appropriate OLR is essential. This helps in establishing an effective and adaptable microbial community within the MFCs, which can be beneficial when facing variations in OLR due to seasonal production changes. (iii) Identifying and maintaining MFC-supporting microbes, including those identified in this study, should be a priority. Keeping these microbes as an integral part of the system’s microbial composition throughout the operation enhances and stabilizes MFC performance.

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Section: Resultsmentioning

confidence: 99%

Optimization of microbial fuel cell performance application to high sulfide industrial wastewater treatment by modulating microbial function

Sriwichai,

Sangcharoen,

Saithong

et al. 2024

PLoS ONE

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“…In the OCS and AS, Nitrospirota (Thermodesulfovibrionia) was the most abundant group, this bacterial group is characterized by anaerobic sulfate reducing metabolism [90,91]. Dyella, Smithella, Desulfusarcinaceae, Aminicenantales were bacteria enriched in AB and AS with members of electroactive bacteria found in MFC, some of them are also sulfate reducers [92][93][94].…”

Section: Analysis Of the Composition Of The Microbial Communities (In...mentioning

confidence: 99%

Boosting Power Generation by Sediment Microbial Fuel Cell in Oil-Contaminated Sediment Amended with Gasoline/Kerosene

Aleman-Gama

Cornejo-Martell²,

Kamaraj³

et al. 2022

J. Electrochem. Sci. Technol

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The high internal resistance (Rint) that develops across the sediment microbial fuel cells (SMFC) limits their power production (~4/10 mW m−2) that can be recovered from an initial oil-contaminated sediment (OCS). In the anolyte, Rint is related to poor biodegradation activity, quality and quantity of contaminant content in the sediment and anode material. While on the catholyte, Rint depends on the properties of the catholyte, the oxygen reduction reaction (ORR), and the cathode material. In this work, the main factors limiting the power output of the SMFC have been minimized. The power output of the SMFC was increased (47 times from its initial value, ~4 mW m−2) minimizing the SMFC Rint (28 times from its initial value, 5000 ohms), following the main modifications. Anolyte: the initial OCS was amended with several amounts of gasoline and kerosene. The best anaerobic microbial activity of indigenous populations was better adapted (without more culture media) to 3 g of kerosene. Catholyte: ORR was catalyzed in birnessite/carbon fabric (CF)-cathode at pH 2, 0.8M Na2SO4. At the class level, the main microbial groups (Gammaproteobacteria, Coriobacteriia, Actinobacteria, Alphaproteobacteria) with electroactive members were found at C-anode and were associated with the high-power densities obtained. Gasoline is more difficult to biodegrade than kerosene. However, in both cases, SMFC biodegradation activity and power output are increased when ORR is performed on birnessite/CF in 0.8 M Na2SO4 at pH 2. The work discussed here can focus on bioremediation (in heavy OCS) or energy production in future work.

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Producing electrical energy in microbial fuel cells based on sulphate reduction: a review

Rodrigues

Leão

2020

Environ Sci Pollut Res

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Important Role of Abiotic Sulfide Oxidation in Microbial Fuel Cells Treating High-Sulfate Wastewater

Cited by 7 publications

References 19 publications

Optimization of microbial fuel cell performance application to high sulfide industrial wastewater treatment by modulating microbial function

Optimization of microbial fuel cell performance application to high sulfide industrial wastewater treatment by modulating microbial function

Boosting Power Generation by Sediment Microbial Fuel Cell in Oil-Contaminated Sediment Amended with Gasoline/Kerosene

Producing electrical energy in microbial fuel cells based on sulphate reduction: a review

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