Efficient dairy wastewater treatment and power production using graphite cylinders electrodes as a biofilter in microbial fuel cell

Marassi, Rodrigo José; López, Mariella B. Galeano; Queiroz, Lucas Gonçalves; Silva, Daniel Clemente V.R.; Silva, Flávio Teixeira da; Paiva, Teresa Cristina Brazil de; Silva, Gilmar Clemente

doi:10.1016/j.bej.2021.108283

Cited by 11 publications

(4 citation statements)

References 35 publications

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“…The MFC was inoculated with a consortium of Shewanella oneidensis and Clostridium butyricum and fed with a synthetic medium of an increasing concentration of dairy wastewater. The maximum power density was 3.5 W·m −3 at 1.0 A·m −3 , the COD removal percentage was 89%, and the Coulombic efficiency was 4.5 at the end of the operation [ 38 ]. Zhu et al developed a high-performance anode for application in MFCs using heteroatom-doped (N, P, S, Co) porous carbon nanoparticles derived from plant polyphenols.…”

Section: Resultsmentioning

confidence: 99%

The Performance of a Modified Anode Using a Combination of Kaolin and Graphite Nanoparticles in Microbial Fuel Cells

Hirsch,

Gandu,

Chiliveru

et al. 2024

Microorganisms

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The bacterial anode in microbial fuel cells was modified by increasing the biofilm’s adhesion to the anode material using kaolin and graphite nanoparticles. The MFCs were inoculated with G. sulfurreducens, kaolin (12.5 g·L−1), and three different concentrations of graphite (0.25, 1.25, and 2.5 g·L−1). The modified anode with the graphite nanoparticles (1.25 g·L−1) showed the highest electroactivity and biofilm viability. A potential of 0.59, 0.45, and 0.23 V and a power density of 0.54 W·m−2, 0.3 W·m−2, and 0.2 W·m−2 were obtained by the MFCs based on kaolin–graphite nanoparticles, kaolin, and bare anodes, respectively. The kaolin–graphite anode exhibited the highest Coulombic efficiency (21%) compared with the kaolin (17%) and the bare (14%) anodes. Scanning electron microscopy and confocal laser scanning microscopy revealed a large amount of biofilm on the kaolin–graphite anode. We assume that the graphite nanoparticles increased the charge transfer between the bacteria that are in the biofilm and are far from the anode material. The addition of kaolin and graphite nanoparticles increased the attachment of several bacteria. Thus, for MFCs that are fed with wastewater, the modified anode should be prepared with a pure culture of G. sulfurreducens before adding wastewater that includes non-exoelectrogenic bacteria.

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Section: Resultsmentioning

confidence: 99%

The Performance of a Modified Anode Using a Combination of Kaolin and Graphite Nanoparticles in Microbial Fuel Cells

Hirsch,

Gandu,

Chiliveru

et al. 2024

Microorganisms

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“…Due to their ability to combine wastewater remediation with bioelectricity generation, microbial fuel cells (MFCs) offer a promising approach. MFCs convert chemical potential directly into electricity, rendering them economical, sustainable, and environmentally favorable [28].…”

Section: Introductionmentioning

confidence: 99%

“…(MFCs) offer a promising approach. MFCs convert chemical potential directly into electricity, rendering them economical, sustainable, and environmentally favorable [28]. Lactose and casein found in dairy wastewater increase the organic effluent load.…”

Section: Introductionmentioning

confidence: 99%

Effect of pH, COD, and HRT on the Performance of Microbial Fuel Cell Using Synthetic Dairy Wastewater

Banerjee,

Calay,

Das

2023

Water

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Microbial fuel cells (MFC) are emerging technologies that can produce electricity while treating wastewater. A series of tests were carried out to evaluate the efficiency of this technology for treating dairy wastewater (DWW). The experiments used Shewanella baltica as an exoelectrogen in a small single MFC to treat simulated DWW. The impacts of various operational factors, specifically pH, hydraulic retention time (HRT), and chemical oxygen demand (COD) in the influent to the anode chamber, were investigated, and the effect of these variables on the output performance of the cell was evaluated. The best performance of the MFC was found when the pH, HRT, and COD were 8, 6.66 h, and 20,632 mg/L, respectively, in the scaled experimental setup. Under these conditions, the maximum power density and percentage removal of COD in terms of wastewater treatment ability were found to be 138 mW/m2 and 71%, respectively. It may be concluded that MFCs are suitable treatment technologies for treating dairy wastewater while potentially simultaneously generating power.

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“…Microalgae can also be cultivated in both indoor and outdoor areas. For instance, microalgae grow in both photo autotrophically and heterotrophically in wastewater [9][10][11]. The presence of heavy metals in the water poses a great threat to the human health due to its toxicity.…”

Section: Introductionmentioning

confidence: 99%

Removal of Toxic Metal Presence in the Wastewater and Production of the Biomass from Microalgae Chlorella sp.

Deepak

Anbarasu²,

Velusamy

2022

Journal of Nanomaterials

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Removal of high toxic metals from the wastewater was one of the mandate options to avoid the environmental pollution caused by the wastewater plant. Microalgae cultivation on the wastewater was one of the hopeful methods to convert the waste into useful by-product. In this study, the Chlorella sp. was used to remove the presence of the total nitrogen (TN) and total phosphorous (TP) in the wastewater. Added to the above, the biomass and lipids of the Chlorella sp. were examined with respect to the incubation time. Chlorella sp. was cultivated using BG11 medium. Here, two different types of wastewater had been used, one from leather industry and other priggery waste. The respective ratio of leather and piggery wastewater used in the current study was 0 : 100, 25 : 75, 50 : 50, 75 : 25, and 100 : 0. The total percentage of the nitrogen and phosphorous removal by the microalgae within 14 days was determined. Based on the findings, it is clear that Chlorella sp. L33 was highly efficient to absorb the nitrate and phosphorous content in the wastewater. With regard to the biomass production, the priggery wastewater treated reported the maximum biomass for 100 μmol/L with 0.55 g/L. However, the 100 μmol/L has higher pH content than other test samples. By varying the ratio of the wastewater, the removals rates can be improved.

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Efficient dairy wastewater treatment and power production using graphite cylinders electrodes as a biofilter in microbial fuel cell

Cited by 11 publications

References 35 publications

The Performance of a Modified Anode Using a Combination of Kaolin and Graphite Nanoparticles in Microbial Fuel Cells

The Performance of a Modified Anode Using a Combination of Kaolin and Graphite Nanoparticles in Microbial Fuel Cells

Effect of pH, COD, and HRT on the Performance of Microbial Fuel Cell Using Synthetic Dairy Wastewater

Removal of Toxic Metal Presence in the Wastewater and Production of the Biomass from Microalgae Chlorella sp.

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