Effect of substrate ratios on the simultaneous carbon, nitrogen, sulfur and phosphorous conversions in microbial fuel cells

Tariq, Madiha; Wang, Jin; Malik, Adeel Jalal; Akhter, Mohammed Salim; Mahmood, Qaisar

doi:10.1016/j.heliyon.2021.e07338

Cited by 7 publications

(4 citation statements)

References 45 publications

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“…The FW's volatile composition allows for rapid breakdown and uptake by anaerobic microbes [41]. In addition, [42] suggested an optimum C/N ratio of organic feed for anaerobic digestion of 25-30. The presence of easily biodegradable organics, as well as the suitable C/N ratio for the anaerobic microbial metabolic degradation of the FW, may be responsible for the higher bioelectricity generation in the corresponding MFC.…”

Section: Performance Of Selected Organic Solid Wastes As the Feed Of ...mentioning

confidence: 99%

“…A moderate feed C/N ratio of 30/1 resulted in the highest voltage output and maximum power density of 0.72 ± 0.1 V and 7.25 W/m 3 , respectively, outperforming those obtained for the C/N ratios of 20/1 (0.56 ± 0.08 V and 4.07 W/m 3 ) and 45/1 (0.64 ± 0.1 V and 5.22 W/m 3 ). A C/N ratio outside the ideal range produces comparatively less power compared to that in the ideal range, i.e., C/N ratios at 25-30 [42]. With a much higher C/N ratio in the organic feed, insufficient nitrogen is available to sustain the anabolism of exoelectrogens.…”

Section: Effect Of C/n Ratio On Mfc Performancementioning

confidence: 99%

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Organic Waste for Bioelectricity Generation in Microbial Fuel Cells: Effects of Feed Physicochemical Characteristics

Parwate,

Xue,

Koottatep

et al. 2024

Processes

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Food waste (FW), piggery waste (PW), and activated sludge (AS) were investigated as potential organic feeds for bioelectricity generation in laboratory-scale microbial fuel cells (MFCs). The MFCs fed by FW gained the highest maximum power density at 7.25 W/m3, followed by those fed by PW at 3.86 W/m3 and AS at 1.54 W/m3. The tCOD removal in the FW-, PW-, and AS-MFCs reached 76.9%, 63.9%, and 55.22%, respectively, within a 30-day retention time. Food waste, which resulted in the highest power density and tCOD removal, was selected for a series of following tests to investigate the effects of some physicochemical properties of organic feed on the performance of MFCs. The effect of feed particle size was tested with three controlled size ranges (i.e., 3, 1, and <1 mm) in MFCs. A smaller feed particle size provided a higher power density of 7.25 W/m3 and a tCOD removal of 76.9% compared to the MFCs fed with organic waste with a larger particle size. An increment in feed moisture from 70% to 90% improved the maximum power density from 7.2 to 8.5 W/m3, with a 17.5% enhancement, and improved the tCOD removal from 75.8% to 83.3%, with a 10.0% enhancement. A moderate C/N ratio of approximately 30/1 maximized the power density and COD removal (7.25 W/m3 and 81.73%) in the MFCs compared to C/N ratios of 20/1 (4.0 W/m3 and 64.14%) and 45/1 (4.38 W/m3 and 71.34%).

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Section: Performance Of Selected Organic Solid Wastes As the Feed Of ...mentioning

confidence: 99%

Section: Effect Of C/n Ratio On Mfc Performancementioning

confidence: 99%

Organic Waste for Bioelectricity Generation in Microbial Fuel Cells: Effects of Feed Physicochemical Characteristics

Parwate,

Xue,

Koottatep

et al. 2024

Processes

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“…Mặc dù, nghiên cứu này chưa được tối ưu nghiêm ngặt để nâng cao hiệu quả loại sulfate/sulfide và khả năng tạo điện năng trong SOFC, nhưng các kết quả thu được cho thấy, việc tích hợp SRR và SOFC đem lại hiệu quả loại sulfate/sulfide tương đối cao, đây là mục tiêu chính cần đạt. Các yếu tố như hoạt động của vi khuẩn KSF, hàm lượng sulfide như chất truyền điện tử trung gian ở anode, oxy được cung cấp bằng sục khí qua dung dịch điện ly ở cathode… có thể đóng vai trò ảnh hưởng đến hiệu quả tạo điện năng của SOFC (Tarig et al, 2021).…”

Section: Khả Năng Tạo đIện Năng Của Sofcunclassified

Sulfate/sulfide removal from wastewater by lab-scale microbial fuel cell

Hoa¹,

Hieu²,

Anh³

et al. 2022

Vietnam J. Biotechnol.

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Sulfate/sulfide-containing wastewater is a widespread environmental contaminant resulting from human activities. These pollutants have negative impact on natural ecosystems and human beings. Biological sulfate/sulfide removal can be achieved by reducing sulfate to sulfide with sulfate-reducing bacteria and then oxidizing sulfide to elemental sulfur (So) with sulfide oxidizing bacteria. In sulfate/sulfide contaminant wastewater lacking electron acceptor for sulfide oxidization, excess sulfide will be produced and accumulated in the treatment system. Therefore, microbial fuel cells (MFCs) have been shown to be a promising technique for the removal of sulfate/sulfide pollutants in wastewater. In this study, a lab-scale MFCs has been developed based on the activity of sulfate-reducing bacterium Desulfovibrio. sp. The results showed that sulfate and sulfide removal efficiencies of 74 - 82% (78 ± 2,5%) and 80.8 - 89.1% (~85,6 ± 3,1%) were achieved, respectively, from the 5th day to the 14th day of operation. The voltage of 0.02V and power density of 7.2 to 7.8 mW/m2 was obtained. In this study, sulfide oxidizing-based MFC integrated with sulfate-reducing bioreactor, representing the feasibility of simultaneous sulfate/sulfide pollutants removal and electricity generation in MFCs. This provides a promising treatment system to scale up for its actual applications in sulfate/sulﬁde removal.

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“…Many studies have been devoted to improving the electrochemical performance and wastewater treatment capacity of MFCs (Lin et al, 2023), mainly focusing on the improvement of MFCs electrode materials (Lin et al, 2023;Wang et al, 2023) and proton exchange membranes (Patel et al, 2022), and relatively significant improvements were achieved. In addition, the nitrogen to phosphorus ratio in the anode chamber substrate is very important for the performance of MFCs (Tariq et al, 2021). Importantly, the nitrogen to phosphorus ratio of the effluent from the anode chamber affects not only the structure of the microbial community in the anode chamber, but also the growth of chlorine spheres, which affects the electrochemical performance of MFCs and its effect on NH 3 -N, COD and total phosphorus in the wastewater (Xu et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous degradation efficiency of C-MFCs for three pollutants in aquaculture wastewater

2023

Global NEST: The International Journal

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<p>Chlorella microbial fuel cells may be an alternative technology for wastewater treatment. Using microalgae and activated sludge as raw materials, a C-MFCs was established, and the effects of different nitrogen and phosphorus ratios in the influent on the electrochemical performance of C-MFCs and the removal effect of NH3-N, COD and TP were investigated. The results show that when N:P=3:1 and the external resistance is 1000 Ω, the removal rates of NH3-N, COD and TP are 72.48±1.94%, 81.26±4.4% and 65.62%±2.14%, respectively, and the highest chlorophyll a content is 108.82 mg/L. The maximum voltage and maximum power 92.94 mV and 234.01 mW/m2. The microbial community structure in the anode chamber was analyzed and the results are as follows: At N:P=3:1, the dominant bacteria at the genus level in the anode chamber were Klebsiella (32.12%) and Prevotella (14.45%). The number of OTUs in the anode chamber changes under different N:P conditions. It can be concluded that N:P affects the power generation capacity of C-MFCs and the removal of NH3-N, COD and TP. Overall,when N:P=3:1, the C-MFCs had the best power production capacity and the removal of NH3-N, COD and TP. Regulation of N:P in aquaculture wastewater is an effective way to improve performance of C-MFCs.</p>

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Effect of substrate ratios on the simultaneous carbon, nitrogen, sulfur and phosphorous conversions in microbial fuel cells

Cited by 7 publications

References 45 publications

Organic Waste for Bioelectricity Generation in Microbial Fuel Cells: Effects of Feed Physicochemical Characteristics

Organic Waste for Bioelectricity Generation in Microbial Fuel Cells: Effects of Feed Physicochemical Characteristics

Sulfate/sulfide removal from wastewater by lab-scale microbial fuel cell

Simultaneous degradation efficiency of C-MFCs for three pollutants in aquaculture wastewater

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