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 (NH4 +–N) increased with the increase of continuous aeration period. In the presence of 4-CP, NH4 +–N removal was mainly by the assimilation process. The removal of NH4 +–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.
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Acknowledgments
Financial supports from the Universiti Sains Malaysia under the Research University (RU) Grant No: 1001/PKIMIA/814149 is gratefully acknowledged. One of us, Jun-Wei Lim, wishes to acknowledge the financial support from MyBrain 15 (MyPhD) programme.
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Lim, JW., Lim, PE., Seng, CE. et al. Evaluation of Aeration Strategy in Moving Bed Sequencing Batch Reactor Performing Simultaneous 4-Chlorophenol and Nitrogen Removal. Appl Biochem Biotechnol 170, 831–840 (2013). https://doi.org/10.1007/s12010-013-0245-8
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DOI: https://doi.org/10.1007/s12010-013-0245-8