Utilisation of pyrochlore-typeoxideas catalyst in bioanode of coffee mac microbial fuel cell: Boost of electric voltage and reduction of wastes

Allah, Imene Kadi; Bekka, Ahmed; Kameche, Mostèfa; Dinnebiér, Robert E.; Touati, Wassila; Chakib, Alaoui; Karmaoui, Mohamed

doi:10.1080/03067319.2021.1928101

Cited by 3 publications

(1 citation statement)

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“…Consequently, SCGs could be a green option for bioelectricity generation in the SMFC systems. Previous studies on coffee in the literature on MFCs have used coffee wastewater [ 24 , 25 ], carbonized SCGs [ 19 , 26 ], and composted SCGs [ 27 ] as their substrates within their MFC systems. Considering all this information, this study aimed to evaluate the potential of pretreatment of raw SCGs via aqueous extraction methods, including the rinsing and immersion action, for bioelectricity generation in the SMFC system as well as the waste-reusing purposes since the direct use of raw SCGs in benthic coastal sediment-based fuel sources has not yet been extensively explored.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Spent Coffee Grounds for Bioelectricity Generation in Sediment Microbial Fuel Cells

Mohd Noor,

Jeong,

Yoon

et al. 2024

Microorganisms

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This study examined the utilization of spent coffee grounds with different aqueous extraction methods for the bioelectricity generation from coastal benthic sediment through a sediment microbial fuel cell (SMFC) system. Different methods for the aqueous extraction of SCGs were evaluated, including rinsing and drying of the SCG (SMFC-CRD), immersion, rinsing and drying (SMFC-CRID), drying alone (SMFC-CD), and untreated SCG (SMFC-C). The caffeine concentration in the SCG was significantly reduced using pretreatments, with SMFC-CRID achieving the lowest concentration of 0.021 ± 0.001 mg/g. SMFC-CRD contributed to the generation of the highest current density of 213.7 mA/m2 during closed-circuit operation and exhibited the highest power density of 96.9 mW/m2 in the polarization test, due to the suitable caffeine content of 0.275 ± 0.001 mg/g in the SCG. This study could provide a cost-effective method for reusing SCGs (i.e., 128 g) while generating bioelectricity as an alternative energy source. These results suggest that pretreatment with SCGs is essential for achieving optimal power density and reducing the caffeine concentration in the SMFC system.

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