Microbial diversity and population dynamics of activated sludge microbial communities participating in electricity generation in microbial fuel cells

2008 ◽  
Vol 58 (11) ◽  
pp. 2195-2201 ◽  
Author(s):  
D. Ki ◽  
J. Park ◽  
J. Lee ◽  
K. Yoo
Keyword(s):  
Fuel Cells ◽  
Activated Sludge ◽  
Microbial Diversity ◽  
Microbial Fuel Cells ◽  
Electricity Generation ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Community Analysis ◽  
Electricity Production ◽  
Anode Chamber

In this study, we performed microbial community analysis to examine microbial diversity and community structure in microbial fuel cells (MFCs) seeded with activated sludge from a municipal wastewater treatment plant in South Korea. Because anode-attached biofilm populations are particularly important in electricity transfer, the ecological characteristics of anode-attached biofilm microbes were explored and compared with those of microbes grown in suspension in an anode chamber. 16S rDNA-based community analysis showed that the degree of diversity in anode-attached biofilms was greater than that of the originally seeded activated sludge as well as that of the suspension-grown microbes in the anode bottle. In addition, Bacteroidetes and Clostridia grew preferentially during MFC electricity generation. Further phylogenetic analysis revealed that the anode biofilm populations described in this work are phylogenetically distant from previously characterized MFC anode biofilm microbes. These findings suggest that a phylogenetically diverse set of microbes can be involved in the electricity generation of MFC anode compartments, and that increased microbial diversity in anode biofilms may help to stabilize electricity production in the MFC.

Contribution of Sulfate-Reducing Bacteria to the Electricity Generation in Microbial Fuel Cells

2014 ◽  
Vol 1008-1009 ◽  
pp. 285-289 ◽  
Author(s):  
Chong Yang Gao ◽  
Ai Jie Wang ◽  
Yang Guo Zhao
Keyword(s):  
Fuel Cells ◽  
Power Density ◽  
Microbial Fuel Cells ◽  
Electricity Generation ◽  
Desulfovibrio Desulfuricans ◽  
Sulfate Reducing Bacteria ◽  
Microbial Community Analysis ◽  
Electricity Production ◽  
Sulfate Reducing ◽  
Reducing Bacteria

Double-chambered microbial fuel cells (MFCs) were used to investigate the effect of sulfate and sulfate-reducing bacteria (SRB) on electricity generation by molybdate inhibition coupled with PCR-DGGE technique. Results showed that low influent sulfate (< 1470 mg/L) improved power density and voltage, while higher sulfate blocked the MFC efficiency. Molybdate inhibited the activity of SRB and consequently decreased MFC voltage and power density which confirmed some SRB were involved in the electricity generation. Microbial community analysis indicated thatDesulfovibrio desulfuricanscontributed to the electricity production and stability of MFC.

scholarly journals Facing Indonesia’s Future Energy with Bacterio-Algal Fuel Cells

2020 ◽  
Vol 3 (2) ◽  
pp. 68-82
Author(s):  
Intan Subadri ◽  
Adhi Satriyatama ◽  
Ignatius D. M. Budi
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Microbial Fuel Cells ◽  
Alternative Energy ◽  
Municipal Wastewater ◽  
Electrode Materials ◽  
Carbon Sources ◽  
Organic Substrate ◽  
Electricity Production ◽  
Operational Parameter

The energy crisis has become a global issue that has plagued almost all parts of the world. MFCs (Microbial Fuel Cells) is an alternative technology because of its ability to convert waste into electrical energy. The bacterio-algal fuel cell (BAFCs) is kind of an effort for increasing the economic value and carbon capture capability of MFCs. In this case, algae used as a catholyte and organic substrate containing anode-reducing exoelectrogenic bacteria acted as anolyte. This research will examine the potential of algae in BAFCs as an alternative energy for Indonesia's future. By photosynthesis reaction, bacterio-algal fuel cells are operated in a self-sustaining cycle. It can be configured in single, dual chambers, and triple chambers. The performance of bacterio-algal fuel cells is strongly influenced by the bacterial and algae species in each compartment. Factors involved in bacterial-algal fuel cells are also analyzed and assessed: electrode materials, membrane, carbon sources, and algae pretreatment, including the operational parameter, such as pH and temperature. Bacterio-algal fuel cells are recommended to be used to convert algae into electricity by scaling-up and integrating the devices. Organic substrate could be obtained from municipal wastewater. Algae as by-product could be harvested and converted into certain products. Algal Fuel Cell is the solution to produce electricity and reduce CO2 pollution at the same time. Also, an algal fuel cell is potential for sustainable use in the future. By integrating the algal fuel cell in the factory that produces high-concentrated wastewater, the fuel cell can purify the wastewater so that it is safe to be drained to the environment and also can make an integrated electricity production for the whole factory. Some ways to improve the power production are proposed to improve the power generation from BAFCs since this technology offers clean, affordable, sustainable energy, and in-line with SDGs.

COD Removal and Electricity Generation From Domestic Wastewater Using Different Anode Materials in Microbial Fuel Cells

2019 ◽  
Vol 8 (1) ◽  
pp. 1-12
Author(s):  
G. Shyamala ◽  
N. Saravanakumar ◽  
E. Vamsi Krishna
Keyword(s):  
Power Generation ◽  
Wastewater Treatment ◽  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Salt Bridge ◽  
Anode Chamber ◽  
Cathode Chamber

Microbial fuel cells (MFCs) set a new trend of converting chemical energy or bio energy to electricity from wastewater (domestic and industries) at the same time removal of chemical oxygen demand (COD) from the wastewater. Electrical energy generated from microbial fuel cell could be used for small electrical device example biosensors. The main components of MFCs are the anode, and the cathode salt bridge. It contains an anode chamber and a cathode chamber which separate electrodes for the production of electricity, using wastewater in an anaerobic chamber helps grow native microorganisms. Adding substrates increases productivity of the electrons that are moving from the anode chamber to the cathode chamber by help of the salt bridge. Bioreactors based on power generation in MFCs are a new approach to wastewater treatment. Power generation and current is modulated in this system. If it is optimised, MFCs would prove to be new method to offset wastewater treatment plant operating costs.

Performance Analysis of Microbial Fuel Cells with Different Exoelectrogens at Low Temperature

2015 ◽  
Vol 733 ◽  
pp. 189-194 ◽  
Author(s):  
Olga Tkach ◽  
Li Hong Liu ◽  
Ai Jie Wang ◽  
Xu Zhou ◽  
Duu Jong Lee
Keyword(s):  
Fuel Cells ◽  
Performance Analysis ◽  
Low Temperature ◽  
Activated Sludge ◽  
Current Density ◽  
Microbial Fuel Cells ◽  
Pure Culture ◽  
Electricity Production ◽  
Microbial Species ◽  
Higher Power

The aim of the study is to compare different kinds of microbial species for electricity production in the microbial fuel cells (MFCs) at low temperature. Experiments were conducted with single-chambered MFCs and medium anode inoculated with pure culture from activated sludge. Three kinds of exoelectrogens includingKlebsiella sp.ALL-1,Shewanella sp.ALL-2 andEnterobacter sp.ALL-3 were used for evaluating their electricity activity. After adding solution into MFCs, the power of density grew from 50 mV to over 530 mV, and finally maintained at about 520+10 mV during the complete cycles. The results showed that MFCs withEnterobacter sp.ALL-3 had higher power and current density, shorter and more stable working circle at same level of voltage producing than other kinds of exoelectrogens. These characteristics madeEnterobacter sp.ALL-3 as optimum exoelectrogen for electricity production at low temperature.

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