Graphitized mango seed as an effective 3D anode in batch and continuous mode microbial fuel cells for sustainable wastewater treatment and power generation

Barakat, Nasser A. M.; Gamal, Shimaa; Ghouri, Zafar Khan; Fadali, Olfat A.; Abdelraheem, Omnia H.; Hashem, Mohamed; Moustafa, Hager M.

doi:10.1039/d3ra05084j

Cited by 5 publications

(1 citation statement)

References 69 publications

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“…Due to the large amount of organic matter in the MFCs, the oxidation-reduction chemical processes generate power (voltage) differences between the electrodes in the first days, and the voltage values can increase by introducing oxygen into the anodic region [31,32]. The high voltage values observed are due to the biofilm area formed by the adhesion between the community of microbes present that was diverse and active [33]. On the contrary, the decrease in the electrical potential values is due to the end of the organic oxidation processes, while the decrease in the last days is due to the microbial reduction rate [34].…”

Section: Results and Analysismentioning

confidence: 99%

Obtaining Sustainable Electrical Energy from Pepper Waste

Segundo,

Magaly,

Luis

et al. 2024

Sustainability

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Currently, two significant problems involve the government, population, and environment: the accelerated increase in organic waste and the need to replace conventional energy with environmentally sustainable energy. The sustainable use of organic waste is being intensely investigated to generate energy plants that produce alternative sustainable electrical energy beneficial to the population at a low cost. The novelty of this research is given by the use of pepper waste as fuel in the generation of bioelectricity, giving added value to these types of waste, benefiting farmers and companies dedicated to the export and import of these fruits, because they will be able to generate their own electrical energy using their own waste at a lower cost. For this reason, this research uses pepper waste as fuel in single-chamber microbial fuel cells manufactured at a low cost as its primary objective. The maximum values of the electric current (5.118 ± 0.065 mA) and electric potential (1.018 ± 0.101 V) were shown on the fourteenth day, with an optimal operating pH of 7.141 ± 0.134 and electrical conductivity of 112.846 ± 4.888 mS/cm. Likewise, a reduction in the COD was observed from 1210.15 ± 0.89 mg/L to 190.36 ± 16.58 mg/L in the 35 days of monitoring and with a maximum ORP of 426.995 ± 8.615 mV, whose internal resistance was 33.541 ± 2.471 Ω. The peak power density was 154.142 ± 8.151 mW/cm2 at a current density of 4.834 A/cm2, and the Rossellomorea marisflavi strain was identified with 99.57% identity.

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Section: Results and Analysismentioning

confidence: 99%

Obtaining Sustainable Electrical Energy from Pepper Waste

Segundo,

Magaly,

Luis

et al. 2024

Sustainability

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Enhancing sustainability and power generation from sewage‐driven air‐cathode microbial fuel cells through innovative anti‐biofouling spacer and biomass‐derived anode

Almasri,

Barakat,

Irfan

2024

J of Chemical Tech & Biotech

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BackgroundRecently, the concept of the membrane‐less microbial fuel cell (MFC) has gained traction to avoid the high internal resistance that is created upon utilizing conventional membranes. Nevertheless, an overlooked problem arises from the ingress of oxygen from the cathode side into the anolyte solution, fostering the formation of biofilms by aerobic microorganisms on the cathode surface. This biofilm layer poses a formidable impediment, leading to cell disconnection. Moreover, low surface area of conventional anodes is another important issue behind the low power density generation. In this research, a novel approach to circumvent biofilm formation and achieve stable and high‐power‐density output from MFCs by harnessing a commercial antibacterial spacer is introduced.ResultsAir‐cathode, sewage‐driven MFCs showed continuous power generation without the need for external microorganisms. Conversely, the absence of the innovative membrane resulted in a catastrophic power breakdown after 125 h of operation due to the formation of a dense biofilm layer on the cathode. Through the utilization of the proposed membrane strategy, stable power density output of 100 ± 8, 135 ± 11 and 142 ± 10 mW m−2 with carbon cloth, carbon paper and carbon felt anodes, respectively, was achieved. Moreover, a novel anode is introduced from graphitization of grape tree branches. The proposed anode could increase the generated power to 516 ± 17 mW m−2 from the sewage‐driven air‐cathode MFC, more than three times compared to the best conventional anode, carbon felt.ConclusionThis study provides significant solutions for sustainability, low‐performance and high‐cost problems of microbial fuel cells. © 2024 Society of Chemical Industry (SCI).

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Integrating the independent granular charge carriers into microbial fuel cell: From performance to mechanism analysis

Liu,

Zhu,

Liang

et al. 2024

Journal of Power Sources

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Graphitized mango seed as an effective 3D anode in batch and continuous mode microbial fuel cells for sustainable wastewater treatment and power generation

Abstract: Herein, we explored the utilization of graphitized mango seeds as 3D-packed anodes in microbial fuel cells (MFCs) powered by sewage wastewater.

Cited by 5 publications

References 69 publications

Obtaining Sustainable Electrical Energy from Pepper Waste

Obtaining Sustainable Electrical Energy from Pepper Waste

Enhancing sustainability and power generation from sewage‐driven air‐cathode microbial fuel cells through innovative anti‐biofouling spacer and biomass‐derived anode

Integrating the independent granular charge carriers into microbial fuel cell: From performance to mechanism analysis

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