title: Sequential nitrification and denitrification in a novel palm shell granular activated carbon twin-chamber upflow bio-electrochemical reactor for treating ammonium-rich wastewater.
abstract: In this study, a twin-chamber upflow bio-electrochemical reactor packed with palm shell granular activated carbon as biocarrier and third electrode was used for sequential nitrification and denitrification of nitrogen-rich wastewater under different operating conditions. The experiments were performed at a constant pH value for the denitrification compartment. The effect of variables, namely, electric current (I) and hydraulic retention time (HRT), on the pH was considered in the nitrification chamber. The response surface methodology was used based on three levels to develop empirical models for the study on the effects of HRT and current values as independent operating variables on NH(4)(+)-N removal. The results showed that ammonium was reduced within the function of an extensive operational range of electric intensity (20-50 mA) and HRT (6-24h). The optimum condition for ammonium oxidation (90%) was determined with an I of 32 mA and HRT of 19.2h.
authors.affiliation: Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Seyyedalireza
authors.initials: S
authors.lastname: Mousavi
authors.forename: Shaliza
authors.initials: S
authors.lastname: Ibrahim
authors.forename: Mohamed Kheireddine
authors.initials: MK
authors.lastname: Aroua
mesh_terms: D028023:Arecaceae / Q000737:chemistry*; D001673:Biodegradation, Environmental; D019149:Bioreactors; D002606:Charcoal / Q000737:chemistry*; D004563:Electrochemistry / Q000295:instrumentation*; D058465:Nitrification; D000644:Quaternary Ammonium Compounds / Q000737:chemistry / Q000302:isolation & purification*; D014462:Ultrafiltration / Q000295:instrumentation*; D062065:Wastewater / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D002606:Charcoal; D000644:Quaternary Ammonium Compounds; D062065:Wastewater; D014874:Water Pollutants, Chemical