title: Role of macrophyte and effect of supplementary aeration in up-flow constructed wetland-microbial fuel cell for simultaneous wastewater treatment and energy recovery.
abstract: This study investigates the role of plant (Elodea nuttallii) and effect of supplementary aeration on wastewater treatment and bioelectricity generation in an up-flow constructed wetland-microbial fuel cell (UFCW-MFC). Aeration rates were varied from 1900 to 0mL/min and a control reactor was operated without supplementary aeration. 600mL/min was the optimum aeration flow rate to achieve highest energy recovery as the oxygen was sufficient to use as terminal electron acceptor for electrical current generation. The maximum voltage output, power density, normalized energy recovery and Coulombic efficiency were 545.77±25mV, 184.75±7.50mW/m3, 204.49W/kg COD, 1.29W/m3and 10.28%, respectively. The variation of aeration flow rates influenced the NO3-and NH4+removal differently as nitrification and denitrification involved conflicting requirement. In terms of wastewater treatment performance, at 60mL/min aeration rate, UFCW-MFC achieved 50 and 81% of NO3-and NH4+removal, respectively. E. nuttallii enhanced nitrification by 17% and significantly contributed to bioelectricity generation.
authors.affiliation: Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
authors.forename: Yoong-Ling
authors.initials: YL
authors.lastname: Oon
authors.affiliation: Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia. Electronic address: ongsoonan@yahoo.com.
authors.forename: Soon-An
authors.initials: SA
authors.lastname: Ong
authors.affiliation: School of Materials Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
authors.forename: Li-Ngee
authors.initials: LN
authors.lastname: Ho
authors.affiliation: Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
authors.forename: Yee-Shian
authors.initials: YS
authors.lastname: Wong
authors.affiliation: Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
authors.forename: Farrah Aini
authors.initials: FA
authors.lastname: Dahalan
authors.affiliation: Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
authors.forename: Yoong-Sin
authors.initials: YS
authors.lastname: Oon
authors.affiliation: Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
authors.forename: Harvinder Kaur
authors.initials: HK
authors.lastname: Lehl
authors.affiliation: Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
authors.forename: Wei-Eng
authors.initials: WE
authors.lastname: Thung
authors.affiliation: School of Materials Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
authors.forename: Noradiba
authors.initials: N
authors.lastname: Nordin
mesh_terms: D001674:Bioelectric Energy Sources; D058440:Denitrification; D004867:Equipment Design; D031321:Hydrocharitaceae / Q000502:physiology*; D058465:Nitrification; D010100:Oxygen; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D062065:Wastewater; D053833:Wetlands
chemical_list: D010100:Oxygen; D062065:Wastewater
keywords: Aeration; Bioelectricity recovery; Biological wastewater treatment; Normalized energy recovery; Up-flow constructed wetland-microbial fuel cell