title: Bio-electro catalytic treatment of petroleum produced water: Influence of cathode potential upliftment.
abstract: Treatment of petroleum produced water (PPW) was studied using bioelectrochemical system (BES) under uplifted cathode potential. The treatment efficiency in terms of COD and hydrocarbon removal was observed at 91.25% and 76.60% respectively, along with the reduction in TDS during BES operation under 400mV of cathode potential. There was also a reduction in concentration of sulfates, however, it was not significant at, since oxidative conditions are being maintained at anode. Improved oxidation of PPW at anode also resulted in good power output (-20.47mA) and also depicted improved fuel cell behaviour. The electrochemical analysis in terms of cyclic/linear sweep voltammetry also showed well correlation with the observed treatment efficiencies. The microbial dynamics of the BES after loading real field wastewater showed the dominance of species that are reported to be effective for petroleum crude oil degradation.
authors.affiliation: TERI University, 10, Institutional Area, Vasant Kunj, New Delhi 110070, India.
authors.forename: Pratiksha
authors.initials: P
authors.lastname: Jain
authors.affiliation: Indian Oil Corporation Limited (IOCL), R&D Centre, Sector 13, Faridabad 121007, Haryana, India.
authors.forename: Sandipam
authors.initials: S
authors.lastname: Srikanth
authors.affiliation: Indian Oil Corporation Limited (IOCL), R&D Centre, Sector 13, Faridabad 121007, Haryana, India.
authors.forename: Manoj
authors.initials: M
authors.lastname: Kumar
authors.affiliation: TERI University, 10, Institutional Area, Vasant Kunj, New Delhi 110070, India; ONGC Energy Center, Oil and Natural Gas Corporation Limited (ONGC), SCOPE Minar, Laxmi Nagar, New Delhi 110092, India.
authors.forename: Priyangshu M
authors.initials: PM
authors.lastname: Sarma
authors.affiliation: Indian Oil Corporation Limited (IOCL), R&D Centre, Sector 13, Faridabad 121007, Haryana, India.
authors.forename: M P
authors.initials: MP
authors.lastname: Singh
authors.affiliation: TERI University, 10, Institutional Area, Vasant Kunj, New Delhi 110070, India; The Energy and Resources Institute (TERI), India Habitat Centre, Lodhi Road, New Delhi 110003, India. Electronic address: banwaril@teri.res.in.
authors.forename: Banwari
authors.initials: B
authors.lastname: Lal
mesh_terms: D001674:Bioelectric Energy Sources; D002384:Catalysis; D055664:Electrochemical Techniques / Q000379:methods; D004566:Electrodes; D007220:Industrial Waste; D059013:Microbial Consortia; D061329:Oil and Gas Fields; D010084:Oxidation-Reduction; D010578:Petroleum; D013431:Sulfates; D062065:Wastewater / Q000032:analysis*; D014867:Water; D018508:Water Purification / Q000379:methods*
chemical_list: D007220:Industrial Waste; D010578:Petroleum; D013431:Sulfates; D062065:Wastewater; D014867:Water
keywords: Anode potential; Bio-electrochemical system (BES); Cathode potential; Microbial fuel cell (MFC); Wastewater treatment