title: Simultaneous removal of AOX and COD from real recycled paper wastewater using GAC-SBBR.
abstract: A lab-scale granular activated carbon sequencing batch biofilm reactor (GAC-SBBR), a combined adsorption and biological process, was developed to treat real wastewater from a recycled paper mill. In this study, one-consortia of mixed culture (4000-5000 mg/L) originating from recycled paper mill activated sludge from Kajang, Malaysia was acclimatized. The GAC-SBBR was fed with real wastewater taken from the same recycled paper mill, which had a high concentration of chemical oxygen demand (COD) and adsorbable organic halides (AOX). The operational duration of the GAC-SBBR was adjusted from 48 h to 24, 12 and finally 8 h to evaluate the effect of the hydraulic retention time (HRT) on the simultaneous removal of COD and AOX. The COD and AOX removals were in the range of 53-92% and 26-99%, respectively. From this study, it was observed that the longest HRT (48 h) yielded a high removal of COD and AOX, at 92% and 99%, respectively.
authors.affiliation: Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia.
authors.forename: Wan Hasnidah Wan
authors.initials: WH
authors.lastname: Osman
authors.forename: Siti Rozaimah Sheikh
authors.initials: SR
authors.lastname: Abdullah
authors.forename: Abu Bakar
authors.initials: AB
authors.lastname: Mohamad
authors.forename: Abdul Amir H
authors.initials: AA
authors.lastname: Kadhum
authors.forename: Rakmi Abd
authors.initials: RA
authors.lastname: Rahman
mesh_terms: D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D002606:Charcoal / Q000737:chemistry; D006846:Hydrocarbons, Halogenated / Q000302:isolation & purification*; D010209:Paper; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D002606:Charcoal; D006846:Hydrocarbons, Halogenated; D062065:Wastewater; D014874:Water Pollutants, Chemical