Relative effect of bioaugmentation with electrochemically active and non-active bacteria on bioelectrogenesis in microbial fuel cell

Raghavulu, S. Veer; Modestra, J. Annie; Amulya, K.; Reddy, C. Nagendranatha; Mohan, S. Venkata

doi:10.1016/j.biortech.2013.07.097

Cited by 59 publications

(12 citation statements)

References 34 publications

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“…3). Initially, the system was optimized using sodium bicarbonate as carbon source (9.5 g/l based on our previous studies with respect to the glucose concentration used) to monitor carboxylic acids production with respect to the operational pH [36,37]. Variation in pH associated with carboxylic acids generation was monitored at regular time intervals of 0, 24 and 48 h during the stage-II operation studied with a HRT of 48 h.…”

Section: Enhancement Of Carboxylic Acids Synthesis (Stage-ii)mentioning

confidence: 99%

Bio-electrocatalytic reduction of CO2: Enrichment of homoacetogens and pH optimization towards enhancement of carboxylic acids biosynthesis

Modestra

Navaneeth

Mohan

2015

Journal of CO2 Utilization

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107

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Section: Enhancement Of Carboxylic Acids Synthesis (Stage-ii)mentioning

confidence: 99%

Bio-electrocatalytic reduction of CO2: Enrichment of homoacetogens and pH optimization towards enhancement of carboxylic acids biosynthesis

Modestra

Navaneeth

Mohan

2015

Journal of CO2 Utilization

Self Cite

107

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“…Microbial fuel cells have been widely used for electricity generation with various microorganisms as biocatalyst, such as Shewanella spp. and Geobacter sulfurreducens [8][9][10]. In those MFCs, electrons generated from intracellular metabolism can be transferred to anode electrode directly via nanowires and outer membrane proteins or indirectly by electron shuttles.…”

Section: Introductionmentioning

confidence: 99%

Microbial fuel cell-assisted utilization of glycerol for succinate production by mutant of Actinobacillus succinogenes

Zheng

et al. 2021

Biotechnol Biofuels

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Background The global production of glycerol is increasing year by year since the demands of biodiesel is rising. It is benefit for high-yield succinate synthesis due to its high reducing property. A. succinogenes, a succinate-producing candidate, cannot grow on glycerol anaerobically, as it needs a terminal electron acceptor to maintain the balance of intracellular NADH and NAD+. Microbial fuel cell (MFC) has been widely used to release extra intracellular electrons. However, A. succinogenes is a non-electroactive strain which need the support of electron shuttle in MFC, and pervious research showed that acid-tolerant A. succinogenes has higher content of unsaturated fatty acids, which may be beneficial for the transmembrane transport of lipophilic electron shuttle. Results MFC-assisted succinate production was evaluated using neutral red as an electron shuttle to recover the glycerol utilization. First, an acid-tolerant mutant JF1315 was selected by atmospheric and room temperature plasma (ARTP) mutagenesis aiming to improve transmembrane transport of neutral red (NR). Additionally, MFC was established to increase the ratio of oxidized NR to reduced NR. By combining these two strategies, ability of JF1315 for glycerol utilization was significantly enhanced, and 23.92 g/L succinate was accumulated with a yield of 0.88 g/g from around 30 g/L initial glycerol, along with an output voltage above 300 mV. Conclusions A novel MFC-assisted system was established to improve glycerol utilization by A. succinogenes for succinate and electricity production, making this system as a platform for chemicals production and electrical supply simultaneously.

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“…The idea behind bio-augmentation of inoculum in MFC is enriching the inoculum with electrogens with special features, meaning it can improve the organic matter oxidation and bioelectricity generation. Bio-augmentation has been previously adopted to reduce the start-up time and to enhance the performance of MFC (Pandit et al, 2015;Raghavulu et al, 2013) by manipulating the operating conditions. A successful application of bio-augmentation ultimately relies on the selection of appropriate microbial strains, ensuring their survival and enhancing the activity of electron transfer to the anode during wastewater treatment in anodic chamber of MFC.…”

Section: Introductionmentioning

confidence: 99%

Optimising the proportion of pure and mixed culture in inoculum to enhance the performance of microbial fuel cells

Jadhav

Ghangrekar

2020

IJETM

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Single-chambered microbial fuel cells (MFCs) were inoculated with different proportions of Shewanella putrefaciens and mixed-anaerobic sludge, viz. 100:0% (MFC-1), 0:100% (MFC-2), 10:90% (MFC-3), 30:70% (MFC-4) and 50:50% (MFC-5). Performance of these MFCs was evaluated using different electrochemical analyses. Due to specific substrate-selectivity, MFC-1 showed lower power (1.22 W.m -3 ) than MFC-2 (2.15 W.m -3 ). Power performance increased from 2.21 (MFC-3) to 2.56 W.m -3 (MFC-4) with increased fraction of Shewanella from 10 to 30% in the inoculum, and power density further enhanced to 3.1 W.m -3 in MFC-5 inoculated with equal-fraction of Shewanella and mixed sludge. Bioelectrochemical analyses showed higher electron transfer rate and lower charge-transfer resistance in MFC-5 due to synergy between both the inoculums and promoted the electron transfer at anode. Thus, inoculation of MFC with equal-fraction of mixed-anaerobic sludge and Shewanella showed effective bio-augmentation to improve the anodic bioactivity and power generation from MFC.

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Relative effect of bioaugmentation with electrochemically active and non-active bacteria on bioelectrogenesis in microbial fuel cell

Cited by 59 publications

References 34 publications

Bio-electrocatalytic reduction of CO2: Enrichment of homoacetogens and pH optimization towards enhancement of carboxylic acids biosynthesis

Bio-electrocatalytic reduction of CO2: Enrichment of homoacetogens and pH optimization towards enhancement of carboxylic acids biosynthesis

Microbial fuel cell-assisted utilization of glycerol for succinate production by mutant of Actinobacillus succinogenes

Optimising the proportion of pure and mixed culture in inoculum to enhance the performance of microbial fuel cells

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