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This study presents an integrated microbial fuel cell with external anoxic bioreactor (MFC-ANB) for simultaneous treatment of slaughterhouse wastewater, nitrogen recovery, and electricity generation. The dual-chamber tubular MFC with biocathode was continuously operated for 43 days on real slaughterhouse wastewater (990 mg/L COD, 200 mg-N/L ammonium). The system achieved exceptional removal efficiencies for COD (99%), ammonium (99.3%), and nitrate (100%), while generating 162.22 mW/m² power density with 13.37% Coulombic efficiency, demonstrating the viability of bioelectrochemical treatment for high-strength industrial wastewater.

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What they did

System
MFC
Substrate
real wastewater

What worked

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Abstract

In recent years and decades, there is a great need for developing new alternative energy sources or renewable sustainable energy. On the other hand, new technology approaches are growing . towards benefits from the valuable nutrients in wastewater which are unrecoverable by traditional wastewater treatment processes. In the current study, a novel integrated system of microbial fuel cell and anoxic bioreactor (MFC-ANB) was designed and constructed to investigate its potential for slaughterhouses wastewater treatment, nitrogen recovery, and power generation. The system consisted of a double-chamber tubular type MFC with biocathode inoculated with freshly collected activated sludge. The MFC-ANB system was continuously fed with real-field slaughterhouse wastewater, with initial concentrations of COD and ammonium were 990 mg/L and 200 mg-N/L, respectively. The MFC-ANB system was operated for a total period of 43 days. Maximum removal efficiencies of COD, ammonium, nitrate, nitrogen recovery, Columbic efficiency, and power generation were 99%, 99.3%, 100%, 100%, 13.37% and 162.22 mW/m² , respectively.

Keywords

Microbial fuel cellWastewaterPulp and paper industryAnoxic watersSewage treatmentRenewable energy

Identifiers

DOI
10.31026/j.eng.2017.05.07
Journal
Journal of Engineering
Year
2017