Enhancement of bioelectricity generation by integrating acidogenic compartment into a dual-chambered microbial fuel cell during rice mill wastewater treatment

2021 ◽  
Vol 105 ◽  
pp. 19-26
Author(s):  
Aryama Raychaudhuri ◽  
Manaswini Behera
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Bioelectricity Generation ◽  
Rice Mill Wastewater

scholarly journals Effect of Anolyte pH on the Performance of a Dual-Chambered Microbial Fuel Cell Operated with Different Biomass Feed

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Md. Abdul Halim ◽  
Md. Owaleur Rahman ◽  
Mohammad Ibrahim ◽  
Rituparna Kundu ◽  
Biplob Kumar Biswas
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cell ◽  
River Water ◽  
Microbial Fuel Cell ◽  
Alternative Energy ◽  
Coulombic Efficiency ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Bioelectricity Generation ◽  
Alternative Energy Resources

Finding sustainable alternative energy resources and treating wastewater are the two most important issues that need to be solved. Microbial fuel cell (MFC) technology has demonstrated a tremendous potential in bioelectricity generation with wastewater treatment. Since wastewater can be used as a source of electrolyte for the MFC, the salient point of this study was to investigate the effect of pH on bioelectricity production using various biomass feed (wastewater and river water) as the anolyte in a dual-chambered MFC. Maximum extents of power density (1459.02 mW·m−2), current density (1288.9 mA·m−2), and voltage (1132 mV) were obtained at pH 8 by using Bhairab river water as a feedstock in the MFC. A substantial extent of chemical oxygen demand (COD) removal (94%) as well as coulombic efficiency (41.7%) was also achieved in the same chamber at pH 8. The overall performance of the MFC, in terms of bioelectricity generation, COD removal, and coulombic efficiency, indicates a plausible utilization of the MFC for wastewater treatment as well as bioelectricity production.

scholarly journals Effect of Influent pH and Hydraulic Retention Time on Bioelectricity Generation in an Integrated Acidogenic Reactor and Microbial Fuel Cell Treating Rice Mill Wastewater

2021 ◽  
Author(s):  
Aryama Raychaudhuri ◽  
Manaswini Behera
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Integrated System ◽  
Operating Conditions ◽  
Electricity Production ◽  
Two Stage ◽  
Bioelectricity Generation ◽  
Rice Mill Wastewater

Abstract An innovative design approach was employed in the present study to enhance the electricity generation and wastewater treatment in a microbial fuel cell (MFC). A dual-chambered MFC with a ceramic separator was coupled with an acidogenic chamber. Acidogenic bioconversion of rice mill wastewater into volatile fatty acid (VFA) represents an interesting approach for wastewater valorization. The VFA containing effluent could be used as an effective substrate for bioelectricity generation in MFCs. A short hydraulic retention time (HRT) can be used for the two-stage anaerobic process (acidogenesis and electrogenesis), thus preventing the proliferation of methanogens. The effect of pH (5.5–7.5) and HRT (0.5 d–0.75 d) were investigated to understand the influence of operational parameters on the performance of the integrated system. The maximum VFA concentration of 1065.15 ± 5.08 mg COD/L was achieved at pH 7.5 and HRT 0.5 d. Under these operating conditions, the general activity of acid-forming microorganisms and exoelectrogens improved remarkably, and the power density obtained from the system was 4.72 ± 0.10 W/m3. The current research indicates excellent potential for simultaneous treatment and electricity production from rice mill wastewater. The use of low-cost, locally manufactured, and customized membranes and the two-stage treatment can pave the way for the practical application of this technology.

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