Evaluation of Aeration Strategy in Moving Bed Sequencing Batch Reactor Performing Simultaneous 4-Chlorophenol and Nitrogen Removal

• Published in: Applied biochemistry and biotechnology Vol. 170; no. 4; pp. 831 - 840
• Main Authors: Lim, Jun-Wei, Lim, Poh-Eng, Seng, Chye-Eng, Adnan, Rohana
• Format: Journal Article
• Language: English
• Published: New York Springer-Verlag 01.06.2013; Springer; Springer Nature B.V
• Subjects: Aeration; Ammonium; Ammonium Compounds - metabolism; Batch reactors; Biochemistry; Biological and medical sciences; Bioreactors; Biotechnology; Carbon - metabolism; Chemistry; Chemistry and Materials Science; Chlorophenol; Chlorophenols - metabolism; Denitrification; Environmental Restoration and Remediation - methods; Fundamental and applied biological sciences. Psychology; Methods. Procedures. Technologies; Nitrates; Nitrification; Nitrogen; Nitrogen - metabolism; Nitrogen removal; Nutrient removal; Oxidation-Reduction; Oxygen - metabolism; Reactors; Reproducibility of Results; Sewage - analysis; Various methods and equipments; Nitrogen removal; 4-Chlorophenol; Aeration strategy; Inhibitory; Moving bed sequencing batch reactor; Aeration; Bioreactor; Moving bed; Sequencing batch reactor; Phenols; Inhibitor; Nitrogen
• ISSN: 0273-2289; 1559-0291
• DOI: 10.1007/s12010-013-0245-8

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.