title: Evaluation of aeration strategy in moving bed sequencing batch reactor performing simultaneous 4-chlorophenol and nitrogen removal.
abstract: The aeration strategy ranging from intermittent to continuous aeration in the REACT period of moving bed sequencing batch reactor (MBSBR) was evaluated for simultaneous removal of 4-chlorophenol (4-CP) and nitrogen. The results show that the removal rates of 4-CP and ammonium nitrogen (NH(4)(+)-N) increased with the increase of continuous aeration period. In the presence of 4-CP, NH(4)(+)-N removal was mainly by the assimilation process. The removal of NH(4)(+)-N to oxidized nitrogen via oxidation was only observed after 4-CP was completely degraded with sufficient aeration period provided indicating the inhibitory effect of 4-CP on nitrification. As the intermittent aeration strategy would lead to slower 4-CP degradation resulting in the delay of nitrification process, continuous aeration would be the preferred strategy in the simultaneous removal of 4-CP and nitrogen in the MBSBR system.
authors.affiliation: School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia.
authors.forename: Jun-Wei
authors.initials: JW
authors.lastname: Lim
authors.forename: Poh-Eng
authors.initials: PE
authors.lastname: Lim
authors.forename: Chye-Eng
authors.initials: CE
authors.lastname: Seng
authors.forename: Rohana
authors.initials: R
authors.lastname: Adnan
mesh_terms: D064751:Ammonium Compounds / Q000378:metabolism; D019149:Bioreactors; D002244:Carbon / Q000378:metabolism; D002733:Chlorophenols / Q000378:metabolism*; D058440:Denitrification; D052918:Environmental Restoration and Remediation / Q000379:methods*; D058465:Nitrification; D009584:Nitrogen / Q000378:metabolism*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000378:metabolism; D015203:Reproducibility of Results; D012722:Sewage / Q000032:analysis*
chemical_list: D064751:Ammonium Compounds; D002733:Chlorophenols; D012722:Sewage; C029107:4-chlorophenol; D002244:Carbon; D009584:Nitrogen; D010100:Oxygen