해양 현장관측을 통한 해양방류 하수플륨의 통계적 근역혼합 특성 KCI

Title
해양 현장관측을 통한 해양방류 하수플륨의 통계적 근역혼합 특성
Alternative Title
Statistical Near Field Mixing Characterisitics of Sokcho Outfall Plumes by the Oceanographic Field Observation
Author(s)
강시환; 김영도; 김상익; 오병철
Publication Year
2002-11
Abstract
The effects of DO and aeration time, traditional nitrification inhibition factors, on nitrite (NO2-) accumulation were studied to find the practical nitrite build-up conditions. The effect of DO on nitrite build-up was studied in 2 l lab-scale SBRs at DO 2.5 mg/l and 1.0 mg/l. The ammonium oxidizer was not inhibited at DO 2.5 mg/l and DO 1.0 mg/l, while nitrite oxidizer was inhibited at DO 1.0 mg/l. That results showed that nitrite oxidation rate of DO 1.0 mg/l was 16% lower than that of DO 2.5 mg/l. To certify the optimum aeration condition for nitrite build-up, experiments were conducted by changing aeration time at DO 1.0 mg/l. The optimum condition for nitritation was 2 cycles per day of 2 hr aeration-9 hr anoxic condition, at which influent ammonium ion (NH4+) was removed 99.9% and 82% of the removed nitrogen was converted to nitrite. However, 50% of the influent ammonium ion was removed and 95 % of the removed nitrogen was accumulated as nitrite at 1 cycle per day of 3 hr aeration-19 hr anoxic condition.
ISSN
1015-6348
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5645
Bibliographic Citation
대한토목학회 논문집B, v.22, no.6-B, pp.843 - 850, 2002
Publisher
대한토목학회
Keywords
sokcho outfall; plumes; field observation; near-field-dilution; mixing zone length
Type
Article
Publisher
대한토목학회
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