School Of Environment And Earth Sciences

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Subject: search.filters.subject.Coulombic efficiency

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    Synergistic effect of TiO2 nanostructured cathode in microbial fuel cell for bioelectricity enhancement
    (Elsevier Ltd, 2023-03-30T00:00:00) Jaswal, Vijay; J, Rajesh Banu; N, Yogalakshmi K.
    Nano-bedecking of electrode with nanoparticles is an effective method to improve power generation of microbial fuel cells (MFCs). In this study, different concentrations (0.25 mg cm?2, 0.50 mg cm?2, 0.75 mg cm?2 and 1.0 mg cm?2) of TiO2 nanoparticles of size 10�25 nm were overlaid on the carbon cloth (CC) using spray pyrolysis technique and used as catalytic cathode in a dual-chambered microbial fuel cell treating distillery wastewater. Results evidenced that TiO2 nanoparticles modified cathode increased the power generation and recorded a highest power and current density of 162.5 � 2 mW m?2 and 1.4 � 0.005 A m?2, respectively. Carbon cloth coated with 0.50 mg cm?2 TiO2 nanoparticles showed 2.8 and 7.3 times higher current and power density as compared to uncoated cathode. MFC operated at a hydraulic retention time (HRT) and organic loading rate (OLR) of 72 h and 59.2 g COD L?1 d?1 showed a maximum chemical oxygen demand (COD) removal of 72.3% which was 15.3% higher than the control MFC. Likewise, the coulombic efficiency of control and modified MFC was 33% and 44%, respectively. The maximum NO3?- N, NO2?- N and NH4+- N removal efficiency of 77.3%, 49.9% and 59.4% were observed for TiO2 nanoparticles modified electrode which was 19.3%, 11.4% and 10.5% higher than control. TiO2 modified cathode was effective in enhancing the bioelectricity generation in MFCs. � 2023
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    Rice husk-derived silicon nanostructured anode to enhance power generation in microbial fuel cell treating distillery wastewater
    (Academic Press, 2022-12-16T00:00:00) Jaswal, Vijay; Kadapakkam Nandabalan, Yogalakshmi
    The present study aims to utilize rice husk as a source of silica to prepare rice husk derived silicon nanoparticles (RH-Si) and demonstrate its ability as an anode modifier in a two-chambered H-shaped microbial fuel cell (MFC). The silicon nanoparticles synthesized by magnesiothermal reduction process were spherical in shape and ranged in size from 15 to 60 nm. The anode modified with silicon nanoparticles of 0.50 mg cm?2 recorded the maximum power and current density of 190.5 mW m?2 and 1.5 A m?2 corresponding to 7.6-fold and 3-fold increase as compared to the control. The modified anode also recorded a COD removal and coulombic efficiency of 74% and 49%, respectively in MFC operated with combined distillery and domestic wastewater at a HRT and OLR of 72 h and 59.2 gCOD L?1 d?1, respectively. The results evidence that RH derived silicon NPs are good anode modifiers and effective in enhancing bioelectricity generation and COD removal in MFCs. � 2022 Elsevier Ltd
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    Effect of organic loading rate on electricity generating potential of upflow anaerobic microbial fuel cell treating surgical cotton industry wastewater
    (Elsevier Ltd, 2017) Tamilarasan, K.; Banu, J.R.; Jayashree, C.; Yogalakshmi, K.N.; Gokulakrishnan, K.
    In this study, the performance of continuous fed upflow anaerobic microbial fuel cell operated with surgical cotton industry wastewater was investigated at different Organic Loading Rate (OLR). The potency of power generation, COD and TSS removal efficiency was determined. The highest TCOD and SCOD removal of 78.8% and 69%, respectively was accomplished at an optimum OLR of 1.9 gCOD/L d. A 62% TSS removal efficiency was obtained, with an initial TSS concentration of wastewater as 970 ? 70 mg/L. The maximum power density 116.03 mW/m2 (2.2 W/m3) and corresponding coulombic efficiency of 17.8% was achieved at the OLR of 1.9 gCOD/L/d while treating surgical cotton industry waste water. ? 2017 Elsevier Ltd.