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Sultan Qaboos University (2017)

Simultaneous electricity production and organic removal from landfill leachate using microbial fuel cell

Baqi, Afeef Ahmed Suhail.

Titre : Simultaneous electricity production and organic removal from landfill leachate using microbial fuel cell

Auteur : Baqi, Afeef Ahmed Suhail.

Université de soutenance : Sultan Qaboos University

Grade : Master of Science (MS) in Civil Engineering 2017

Résumé partiel
Recently, microbial fuel cells (MFCs) considered as a promising technology for direct conversion of biochemical energy into electrical energy. The new technology is environment friendly and efficient for recovering bio-electricity and removing organic wastes. That’s why, it is attracting the great attention to the scientific community. Different substrates had been used in MFCs as food for bacteria. Landfill leachate showed a promising feedstock for MFCs system. In this study, two identical single chamber air-cathode MFCs (Volume, 1250 ml) with carbon brushes as anode electrode and Platinum (Pt) coated carbon cloth as cathode electrode was used to investigate the bio-electrical performance for two different concentrations of diluted landfill leachate. The system operated with 8 hours hydraulic retention time (HRT). The MFCs were operated in continuous mode after inoculation of microbial community using raw domestic wastewater for 30 days. The COD content of the raw wastewater used for inoculation was 376-593 mg/L. The MFC produced 161.9 mW/m2 of power density with an internal resistance of Rint = 36 12 during inoculation period, when domestic wastewater was the sole substrate for bacteria. Then the systems were operated with two mixtures of leachate and wastewater as 1:10 (leachate : wastewater) and 1:5 (leachate : wastewater). The mixtures, 1:10 and 1:5 (leachate : wastewater) contained COD as 2,588-4,008 mg/L and 4,286- 6,068 mg/L, respectively. Each mixtures were used as substrates for 5 days during

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