Freezing/thawing effect on sewage sludge degradation and electricity generation in microbial fuel cell

2014 ◽  
Vol 70 (3) ◽  
pp. 444-449 ◽  
Author(s):  
Yuejia Chen ◽  
Junqiu Jiang ◽  
Qingliang Zhao
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Electricity Generation ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Ammonium Nitrogen ◽  
Organic Matter Degradation ◽  
Freezing Time

The effect of sludge freezing/thawing on its disintegration and subsequent use as substrate in a microbial fuel cell (MFC) was investigated to enhance organic matter degradation and electricity generation. Experimental results indicated that long freezing time (more than 48 h) was effective in disintegrating the sludge collected from the secondary sedimentation tank of a wastewater treatment plant. Freezing/thawing pretreatment could enhance the degradation of total chemical oxygen demand (COD) and electricity generation in MFC due to the higher concentration of soluble COD and ammonium nitrogen available in the pretreated sludge. The removal efficiency of total COD was increased from 25.3% (raw sludge as substrate) to 66.2% and the maximum power output was increased from 8.9 (raw sludge as substrate) to 10.2 W/m3 in MFC.

scholarly journals Microbial Fuel Cell with Ni–Co Cathode Powered with Yeast Wastewater

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3194 ◽  
Author(s):  
Paweł Włodarczyk ◽  
Barbara Włodarczyk
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Electricity Production ◽  
High Concentration ◽  
Yeast Wastewater

Wastewater originating from the yeast industry is characterized by high concentration of pollutants that need to be reduced before the sludge can be applied, for instance, for fertilization of croplands. As a result of the special requirements associated with the characteristics of this production, huge amounts of wastewater are generated. A microbial fuel cell (MFC) forms a device that can apply wastewater as a fuel. MFC is capable of performing two functions at the same time: wastewater treatment and electricity production. The function of MFC is the production of electricity during bacterial digestion (wastewater treatment). This paper analyzes the possibility of applying yeast wastewater to play the function of a MFC (with Ni–Co cathode). The study was conducted on industrial wastewater from a sewage treatment plant in a factory that processes yeast sewage. The Ni–Co alloy was prepared by application of electrochemical method on a mesh electrode. The results demonstrated that the use of MFC coupled with a Ni–Co cathode led to a reduction in chemical oxygen demand (COD) by 90% during a period that was similar to the time taken for reduction in COD in a reactor with aeration. The power obtained in the MFC was 6.1 mW, whereas the volume of energy obtained during the operation of the cell (20 days) was 1.27 Wh. Although these values are small, the study found that this process can offer an additional level of wastewater treatment as a huge amount of sewage is generated in the process. This would provide an initial reduction in COD (and save the energy needed to aerate wastewater) as well as offer the means to generate electricity.

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 Performance of Microbial Fuel Cell for Wastewater Treatment and Electricity Generation

2013 ◽  
Vol 2 (2) ◽  
pp. 131-135
Author(s):  
Z Yavari ◽  
H Izanloo ◽  
K Naddafi ◽  
H.R Tashauoei ◽  
M Khazaei
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Electricity Generation ◽  
Loading Rate ◽  
Synthetic Wastewater ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Sustainable Operation ◽  
Cell Reactor

Renewable energy will have an important role as a resource of energy in the future. Microbial fuel cell (MFC) is a promising method to obtain electricity from organic matter andwastewater treatment simultaneously. In a pilot study, use of microbial fuel cell for wastewater treatment and electricity generation investigated. The bacteria of ruminant used as inoculums. Synthetic wastewater used at different organic loading rate. Hydraulic retention time was aneffective factor in removal of soluble COD and more than 49% removed. Optimized HRT to achieve the maximum removal efficiency and sustainable operation could be regarded 1.5 and 2.5 hours. Columbic efficiency (CE) affected by organic loading rate (OLR) and by increasing OLR, CE reduced from 71% to 8%. Maximum voltage was 700mV. Since the microbial fuel cell reactor considered as an anaerobic process, it may be an appropriate alternative for wastewater treatment

Performance of denitrifying microbial fuel cell subjected to variation in pH, COD concentration and external resistance

2013 ◽  
Vol 68 (1) ◽  
pp. 250-256 ◽  
Author(s):  
Jin-Tao Li ◽  
Shao-Hui Zhang ◽  
Yu-Mei Hua
Keyword(s):  
Fuel Cell ◽  
Chemical Oxygen Demand ◽  
Microbial Fuel Cell ◽  
Electricity Generation ◽  
Oxygen Demand ◽  
Pollutant Removal ◽  
Acidic Ph ◽  
External Resistance ◽  
Weakly Alkaline ◽  
Effects Of Ph

The effects of pH, chemical oxygen demand (COD) concentration and external resistance on denitrifying microbial fuel cell were evaluated in terms of electricity generation characteristics and pollutant removal performance. The results showed that anodic influent with weakly alkaline or neutral pH and cathodic influent with weakly acidic pH favored pollutant removal and electricity generation. The suitable influent pH of the anode and cathode were found to be 7.5–8.0 and 6.0–6.5, respectively. In the presence of sufficient nitrate in the cathode, higher influent COD concentration led to more electricity generation and greater pollutant removal rates. With an anodic influent pH of 8.0 and a cathodic influent pH of 6.0, an influent COD concentration of 400 mg/L was deemed to be appropriate. Low external resistance favored nitrate and COD removal. The results suggest that operation of denitrifying microbial fuel cell at a lower external resistance would be desirable for pollutant removal but not electricity generation.

The effect of flow modes and electrode combinations on the performance of a multiple module microbial fuel cell installed at wastewater treatment plant

2016 ◽  
Vol 105 ◽  
pp. 351-360 ◽  
Author(s):  
Weihua He ◽  
Maxwell J. Wallack ◽  
Kyoung-Yeol Kim ◽  
Xiaoyuan Zhang ◽  
Wulin Yang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Multiple Module

Electricity generation from dissolved organic matter in polluted lake water using a microbial fuel cell (MFC)

2013 ◽  
Vol 71 ◽  
pp. 57-61 ◽  
Author(s):  
Yan-Rong He ◽  
Xiang Xiao ◽  
Wen-Wei Li ◽  
Pei-Jie Cai ◽  
Shi-Jie Yuan ◽  
...  
Keyword(s):  
Organic Matter ◽  
Fuel Cell ◽  
Dissolved Organic Matter ◽  
Microbial Fuel Cell ◽  
Lake Water ◽  
Electricity Generation ◽  
Polluted Lake
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