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Representative MFC — matched on the paper’s system type only, not its reactor or geometry.

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What they did

System
MFC

What worked

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Abstract

The release of brewery wastewater sludge with high pollutants and soluble organic contents can pose a significant threat to human health and environment due to their toxicity. The present study aims at investigating the potential of Microbial Fuel Cell (MFC) to utilize brewery wastewater sludge as feed stock of electricity generation. The characterization of the brewery wastewater sludge before and after it goes through the microbial fuel cell was analyzed using reactor digestion method, OxiTop BOD5, (HACH method DR890) molybdovanadate method, (HACH method DR 890) TNT per-sulfate digestion method for chemical oxygen demand (COD), biological oxygen demand (BOD), total nitrogen (TN), and total phosphorus (TP) respectively. The effect of varying salt concentrations (1 M, 2M, and 3M) of the salt bridge in MFC have been analyzed with different factors like temperature ranging 20 to 45 °C, and pH ranging from 4 to 10. Results were analyzed in terms of efficiency in chemical oxygen demand (COD), biological oxygen demand (BOD5), total nitrogen (TN), and total phosphorus (TP) removal and capability of energy generation. The optimum temperature was found 32.5 °C, with the optimum pH of 7 and 3 M salt bridge concentration in which the maximum removal percentage and power generation was observed. At the optimum condition the observed power output, removal percentage of chemical oxygen demand (COD), biological oxygen demand (BOD5), total nitrogen (TN), and total phosphorus (TP) were 0.88 V, 93.58%, 93.07%, 1.39%, and 1.19% respectively. Box-Behnken experimental design (BBD) has been used to find the optimum condition for voltage production, chemical oxygen demand (COD), biological oxygen demand (BOD5), total nitrogen (TN), and total phosphorus (TP) removal percentage.

Keywords

Microbial fuel cellWaste managementSewage treatmentWastewaterSalt (chemistry)Salt bridge

Identifiers

DOI
10.20372/nadre/11191
Journal
National Academic Digital Repository of Ethiopia
Year
2019