Electricity generation from rice bran in microbial fuel cells

Takahashi, Shu; Miyahara, Morio; Kouzuma, Atsushi; Watanabe, Kazuya

doi:10.1186/s40643-016-0129-1

Cited by 30 publications

(21 citation statements)

References 23 publications

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“…We were interested in whether the micro ltration membrane affects cell growth, so we measured the biomass of the anolyte and anode. The biomass of the microbial population can be indirectly calculated by measuring the protein content [22]. During the electricity generation process of MFCs, the amounts of EAB in anode bio lm and anolyte suspension in coated-MFC and uncoated-MFC as assessed by the protein contents were compared ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Effects of Biofilm Transfer and Electron Mediators Transfer on Klebsiella quasipneumoniae sp.203 Electricity Generation Performance in MFCs

Guo

Wang

Zhang

et al. 2020

Preprint

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Background: Extracellular electron transfer ( EET ) is essential in improving the power generation performance of electrochemically active bacteria ( EAB ) in microbial fuel cells ( MFCs ) . Currently, the EET mechanisms of dissimilatory metal-reducing ( DMR ) model bacteria Shewanella oneidensis and Geobacter sulfurreducens have been thoroughly studied. Klebsiella has also been proved to be an EAB capable of EET, but the EET mechanism has not been perfected. This study investigated the effects of biofilm transfer and electron mediators transfer on Klebsiella quasipneumoniae sp. 203 electricity generation performance in MFCs. Results： Herein, we covered the anode of MFC with a layer of microfiltration membrane to block the effect of the biofilm mechanism, and then explore the EET of the electron mediator mechanism of K.quasipneumoniae sp. 203 and electricity generation performance. In the absence of short-range electron transfer, we found that K.quasipneumoniae sp. 203 can still produce a certain power generation performance, and coated-MFC reached 40.26 mW / m 2 at a current density of 770.9 mA / m 2 whereas the uncoated-MFC reached 90.69 mW / m 2 at a current density of 1224.49 mA / m 2 . The difference in the electricity generation performance between coated-MFC and uncoated-MFC was probably due to the microfiltration membrane covered in anode, which inhibited the growth of EAB on the anode. Therefore, we speculated that K.quasipneumoniae sp. 203 can also perform EET through the biofilm mechanism. The protein content, the integrity of biofilm and the biofilm activity all proved that the difference in the electricity generation performance between coated-MFC and uncoated-MFC was due to the extremely little biomass of the anode biofilm. To further verify the effect of electron mediators on electricity generation performance of MFCs, 10µM 2,6-DTBBQ, 2,6-DTBHQ and DHNA were added to coated-MFC and uncoated-MFC. Combining the time-voltage curve and CV curve, we found that 2,6-DTBBQ and 2,6-DTBHQ had high electrocatalytic activity toward the redox reaction of K.quasipneumoniae sp.203-inoculated MFCs. It was also speculated that K. quasipneumoniae sp. 203 produced 2,6-DTBHQ and 2,6-DTBBQ. Conclusions: To the best of our knowledge, the three modes of EET did not exist separately. K.quasipneumoniae sp.203 will adopt the corresponding electron transfer mode or multiple ways to realize EET according to the living environment to improve electricity generation performance.

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Section: Resultsmentioning

confidence: 99%

Effects of Biofilm Transfer and Electron Mediators Transfer on Klebsiella quasipneumoniae sp.203 Electricity Generation Performance in MFCs

Guo

Wang

Zhang

et al. 2020

Preprint

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“…The high percentage of bacteria assigned to Lactobacillales order observed in C-Tex MEC may be related with high current generation since several species belonging to the Lactobacillales order have been described as electrochemically active bacteria (e.g. Trichococcus) [45]. Bacteroidetes was the second most abundant phyla identified in the anodic biofilms representing 5%e12% of the total bacteria population ( Fig.…”

Section: Microbial Community Analysismentioning

confidence: 95%

“…The remaining percentage of Lactobacillales was classified as "unknown". Trichococcus bacteria, an example of a bacteria assigned to the Lactobacillales order was reported by Takahashi and co-workers due to its capability of utilizing electrodes as extracellular electron acceptors producing electricity from rice bran [45]. Tissierella creatinhophila representing 41%e53% of the Tissierellales order, has the ability to grow on urine, metabolizing creatinine as sole carbon source to acetate, methylamine, ammonia and carbon dioxide [46].…”

Section: Microbial Community Analysismentioning

confidence: 99%

Influence of carbon anode properties on performance and microbiome of Microbial Electrolysis Cells operated on urine

Barbosa

Peixoto

Soares

et al. 2018

Electrochimica Acta

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Anode performance of Microbial Electrolysis Cells (MECs) fed with urine using different anodes, Keynol (phenolic-based), C-Tex (cellulose-based) and PAN (polyacrylonitrile-based) was compared under cell potential control (1st assay) and anode potential control (2nd assay). In both assays, C-Tex MEC outperformed MECs using Keynol and PAN. C-Tex MEC under anode potential control (À0.300 V vs. Ag/AgCl) generated the highest current density (904 mA m À2), which was almost 3-fold higher than the Keynol MEC and 8-fold higher than the PAN MEC. Analysis of anodes textural, chemical and electrochemical characteristics suggest that the higher external surface area of C-Tex enabled higher current density generation compared to Keynol and PAN. Anodes properties did not influence significantly the microbial diversity of the developed biofilm. Nonetheless, C-Tex had higher relative abundance of bacteria belonging to Lactobacillales and Enterobacteriales suggesting its correlation with the higher current generation.

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“…Microbial fuel cells have been examined for electricity generation from swine wastewater (Min et al 2005), cattle manure (Inoue et al 2013), and rice bran (Takahashi et al 2016). However, no study has examined the potential of poultry droppings wastewater (PDWW) as MFC feedstock; hence no threshold level of PDWW concentration has been reported.…”

Section: Introductionmentioning

confidence: 99%

Electricity generation potential of poultry droppings wastewater in microbial fuel cell using rice husk charcoal electrodes

Oyiwona

Ogbonna

Anyanwu

et al. 2018

Bioresour. Bioprocess.

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Background: Poultry droppings from poultry farms and rice husks obtained from rice milling process are generally considered as wastes and discarded in Nigeria. Although many studies have shown that microbial fuel cells (MFCs) can generate electricity from organic wastes, little or no study have examined MFCs for generating electricity from poultry droppings and rice husk as electrode material. Findings: Laboratory-scale double-chamber MFCs were inoculated with concentrations of poultry droppings wastewater and supplied with rice husk charcoal as anode and cathode electrodes for electricity generation. Power outputs and dissolved organic carbon (DOC) removal efficiencies were compared between MFCs using rice husk charcoal (RHCE) as electrode and those using carbon cloth (CCE) as electrodes. The RHCE-MFC 2 containing 477 mg L −1 dissolved organic carbon produced a volumetric power density of 6.9 ± 3.1 W m −3 which was higher than the control and the CCE-MFCs by a factor of 2 and achieved at DOC removal efficiencies of 40 ± 1.2%. Conclusions: The results suggest that poultry droppings wastewater is a feasible feedstock for generating electricity in MFCs. The findings also suggest that rice husk charcoal is a potentially useful electrode material in MFCs.

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Electricity generation from rice bran in microbial fuel cells

Cited by 30 publications

References 23 publications

Effects of Biofilm Transfer and Electron Mediators Transfer on Klebsiella quasipneumoniae sp.203 Electricity Generation Performance in MFCs

Effects of Biofilm Transfer and Electron Mediators Transfer on Klebsiella quasipneumoniae sp.203 Electricity Generation Performance in MFCs

Influence of carbon anode properties on performance and microbiome of Microbial Electrolysis Cells operated on urine

Electricity generation potential of poultry droppings wastewater in microbial fuel cell using rice husk charcoal electrodes

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