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http://dx.doi.org/10.11001/jksww.2018.32.1.011

Aeration control based on respirometry in a sequencing batch reactor  

Kim, Donghan (Department of Environmental Engineering, Seowon University)
Kim, Sunghong (Department of Civil Engineering, Chosun University)
Publication Information
Journal of Korean Society of Water and Wastewater / v.32, no.1, 2018 , pp. 11-18 More about this Journal
Abstract
As the sequencing batch reactor process is a time-oriented system, it has advantages of the flexibility in operation for the biological nutrient removal. Because the sequencing batch reactor is operated in a batch system, respiration rate is more sensitive and obvious than in a continuous system. The variation of respiration rate in the process well represented the characteristics of biological reactions, especially nitrification. The respiration rate dropped rapidly and greatly with the completion of nitrification, and the maximum respiration rate of nitrification showed the activity of nitrifiers. This study suggested a strategy to control the aeration of the sequencing batch reactor based on respirometry. Aeration time of the optimal aerobic period required for nitrification was daily adjusted according to the dynamics of respiration rate. The aeration time was mainly correlated with influent nitrogen loadings. The anoxic period was extended through aeration control facilitating a longer endogenous denitrification reaction time. By respirometric aeration control in the sequencing batch reactor, energy saving and process performance improvement could be achieved.
Keywords
Aeration control; Nitrification; Respirometry; Sequencing batch reactor;
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