The use of microbial fuel cell for efficient treatment of cauliflower waste and generation of electricity

Maharjan, Rocky; Dhungana, Pradip; Sreerama, Lakshmaiah; Bhatt, Puja; Prajapati, Bikram; Poudel, Prabesh; Kandel, Pratap; Khadka, Mamata; Parajuli, Apshara; Joshi, Jarina

doi:10.1080/14786451.2023.2185869

Cited by 6 publications

(3 citation statements)

References 53 publications

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“…Previously, we have demonstrated that use of MWCNT (multi-walled carbon nanotube)-coated electrodes in an MEC is more effective in fermentation and electricity generation [17]. In this study, we find that the use of MWCNT-coated graphite as electrodes, as compared to the use of normal graphite electrodes, results in a 23% increase in the amount of biogas produced (Figure 5).…”

Section: Variation In Biogas Production With the Use Of Mwcnt Coated ...supporting

confidence: 49%

“…Protein concentrations were determined via the Lowry method using bovine serum albumin as a standard [16]. Chemical oxygen demand (COD) was determined using 1000 mg/L phthalate solution as standard [17]. The cow dung sample, digested in an oven at 150 • C for 2 h, was cooled, and the absorbance of the solutions were measured against a blank at 600 nm.…”

Section: Chemical Analysis Of Substratementioning

confidence: 99%

“…Finally, the electrodes were washed with distilled water via ultrasonication for 15 min. Electrodes were then dried in the oven at 60 • C for 24 h. Before the use, these electrodes were irradiated with UV light for about 15 min [17].…”

Section: Treatment Of Graphite Electrodesmentioning

confidence: 99%

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Enhancement of Biogas (Methane) Production from Cow Dung Using a Microbial Electrochemical Cell and Molecular Characterization of Isolated Methanogenic Bacteria

Bhatt,

Poudyal,

Dhungana

et al. 2024

Biomass

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Biogas has long been used as a household cooking fuel in many tropical counties, and it has the potential to be a significant energy source beyond household cooking fuel. In this study, we describe the use of low electrical energy input in an anaerobic digestion process using a microbial electrochemical cell (MEC) to promote methane content in biogas at 18, 28, and 37 °C. Although the maximum amount of biogas production was at 37 °C (25 cm3), biogas could be effectively produced at lower temperatures, i.e., 18 (13 cm3) and 28 °C (19 cm3), with an external 2 V power input. The biogas production of 13 cm3 obtained at 18 °C was ~65-fold higher than the biogas produced without an external power supply (0.2 cm3). This was further enhanced by 23% using carbon-nanotubes-treated (CNT) graphite electrodes. This suggests that the MEC can be operated at as low as 18 °C and still produce significant amounts of biogas. The share of CH4 in biogas produced in the controls was 30%, whereas the biogas produced in an MEC had 80% CH4. The MEC effectively reduced COD to 42%, whereas it consumed 98% of reducing sugars. Accordingly, it is a suitable method for waste/manure treatment. Molecular characterization using 16s rRNA sequencing confirmed the presence of methanogenic bacteria, viz., Serratia liquefaciens and Zoballella taiwanensis, in the inoculum used for the fermentation. Consistent with recent studies, we believe that electromethanogenesis will play a significant role in the production of value-added products and improve the management of waste by converting it to energy.

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Section: Variation In Biogas Production With the Use Of Mwcnt Coated ...supporting

confidence: 49%

Section: Chemical Analysis Of Substratementioning

confidence: 99%