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KMID : 1024520180270010039
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Journal of the Environmental Sciences
2018 Volume.27 No. 1 p.39 ~ p.45
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A Study on Removal Efficiency of T-N in Bench-scale for Shipboard Sewage Treatment Plant
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Choi Young-Ik
Shin Dae-Yeol
Lee Seung-Chul
Jung Jin-Hee
Yoon Young-Nae
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Abstract
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In this study, the International Maritime Organization (IMO)'s guideline MEPC. 277 (64) was developed and evaluated for the removal efficiency of T-N in a SBR and MBR combined process. This combined process of resized equipment based on large capacity water treatment device for a protection of marine aquatic life. In this experiment, T-N concentration of influent and effluent was measured through with the artificial wastewater. The SBR reactor operation time was varied according to the C : N : P ratios so that different conditions for mixing and aeration period in mins (90 : 60, 80 : 40, 70 : 50) and two C: N: P ratios (10 : 5 : 3, 10 : 3 : 1) were used. During experiment in the reactor's aeration and anoxic tank DO concentrations were 3 mg/L and 0.2 mg/L respectively. Furthermore, in the reactor MLSS concentration was 2000 mg/L and flowrate was 2 L/hr. Experiment results showed that C : N : P, 10 : 3 : 1 ratio with 90 mins mixing and 60 mins aeration maximized removal efficiency at 97.3% T-N as compared to other conditions. The application of the SBR and MBR combined process showed efficient results.
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KEYWORD
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Shipboard STP, C:N:P, SBR, MBR, T-N
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