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The Study for Enhancement of Nitrogen Removal Efficiency in M-Dephanox Process  

Ryu, Hong-Duck (Department of Environmental Engineering, Chungbuk National University)
Lee, Sang-Ill (Department of Environmental Engineering, Chungbuk National University)
Publication Information
Journal of Korean Society on Water Environment / v.22, no.1, 2006 , pp. 74-82 More about this Journal
Abstract
In this study, development of M2-Dephanox and M3-Dephanox process has been tried to enhance the nitrogen removal of M-Dephanox process on the basis of previous study about M-Dephanox. The results showed that T-N removal efficiency of M3-Dephanox process was 8.9% or 11.3% higher than M-Dephanox or M2-Dephanox processes, respectively. This result is due to the lower $NO_3{^-}-N$ concentration in the effluent of M3-Dephanox than of M-Dephanox and M2-Dephanox processes. This results were recurrenced by PASS simulator. As result of simulation by PASS program, effluent $NO_3{^-}-N$ concentration of M3-Dephanox process was 1.4 mg/L and 3.6 mg/L lower than M-Dephanox and M2-Dephanox processes. In the study about optimization of M3-Dephanox processes by PASS program, SRT greatly affected T-N removal of M3-Dephanox process, whereas, the recycle rate and recirculation rate did little affect T-N removal efficiency of M3-Dephanox. In the study about optimization of reactors following the nitrification reactor of M3-Dephanox process, it was shown that the best optimum volume ratio of denitrification reactor, intermittently aerated reactor and anoxic reactor for the T-N removal were 29.1(%) : 32.7(%) : 38.2(%). T-N removal efficiency at this volume ratio was similar to T-N removal efficiency at the volume ratio of 36.3(%) : 36.3(%) : 27.4(%) designed for the lab-scale M3-Dephanox.
Keywords
M-Dephanox; M2-Dephanox; M3-Dephanox; PASS;
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Times Cited By KSCI : 1  (Citation Analysis)
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