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길경익,위승경,이상수,박무종,Gil. Kyung-Ik,Wee. Seung-Kyung,Lee. Sang-Soo,Park. Moo-Jong 한국방재학회 2008 한국방재학회 학술발표대회논문집 Vol.2008 No.1
During the dry periods, many types of pollutant are accumulating on the paved surface by vehicle activities and accumulated various pollutants are inflowing to the near watershed areas for the rainfall periods. Also, the metals, toxic chemicals and sediments originated from bridges could be strongly influenced to the watershed areas during the runoff. The result shows that the EMC ranges for 95% confidence intervals in a bridge land use are <TEX>$10.12\sim128.09mg/L$</TEX> for TSS, <TEX>$6.07\sim21.15mg/L$</TEX> for BOD, <TEX>$2.10\sim6.70mg/L$</TEX> for TN and <TEX>$0.06\sim0.85mg/L$</TEX> for TP.
길경익,위승경,박무종,Gil, Kyung-Ik,Wee, Seung-Kyung,Park, Moo-Jong 한국방재학회 2008 한국방재학회논문집 Vol.8 No.4
도로나 교량과 같은 불투수율이 높은 포장지역의 경우 차량의 통행으로 건기기간 동안 축적되어 있던 다양한 비점오염원이 강우 지속시간 동안 인근 하천에 유입되어 심각한 영향을 미치고 있다. 따라서 본 연구는 2년 동안 모니터링을 실시하여 각 오염물질별 유량가중평균농도 및 오염 부하량을 산정하였다. 모니터링 결과 TSS EMC는 11.60$\sim$230.90 mg/L의 범위, BOD EMC는 4.58$\sim$31.90 mg/L의 범위, TN과 TP의 EMC는 각각 1.86$\sim$9.20 mg/L, 0.14$\sim$1.55 mg/L의 범위로 산정되었다. 또한 오염 부하량은 TSS는 0.78$\sim$18.01 kg/day의 범위, BOD는 0.47$\sim$1.17 kg/day의 범위로 산정되었고, Pb은 0.00$\sim$0.01 kg/day의 범위, Zn은 0.01$\sim$0.06 kg/day의 범위로 산정되었다. The paved area like a road or bridge where having high impermeable rates were accumulated various non-point sources(NPS) by passing vehicles during dry season periods. They are flowed in the river continuous when it rains and could negative impact on environment. Therefore, this study monitoring NPS for two years and determinating for each pollutant EMCs and mass loading. The result shows that the EMC ranges are 11.60$\sim$230.90 mg/L for TSS, 4.58$\sim$31.90 mg/L for BOD, 1.86$\sim$9.20 mg/L for TN and 0.14$\sim$1.55 mg/L for TP. Also, the ranges of washed-off mass loading are determined to 0.78$\sim$18.01 kg/day for TSS, 0.47$\sim$1.17 kg/day for BOD, 0.00$\sim$0.01 kg/day for Pb and 0.01$\sim$0.06 kg/day for Zn.
길경익,이병수,이상수,박무종,Gil,Kyung-Ik,Lee,Byung-Soo,Lee,Sang-Soo,Park,Moo-Jong 한국방재학회 2008 한국방재학회 학술발표대회논문집 Vol.2008 No.1
The main goal of this study is to understand the effects of direct-runoff of chemistry and organic fertilizers which are adsorbing to sediment from farmland and non-point source discharge characteristics which are discharged to stream with soil erosion when rainfalls. pollutographs of TSS, BOD, COD, TN, and TP were measured for 10 rainfall events at watershed. EMC (Event Mean Concentration) were calculated for each rainfall event using quality and quantity measured. The result shows that the EMC ranges of 95% confidence intervals are 50.5-203 mg/L for TSS, 0.8-14.2 mg/L for <TEX>$BOD_5$</TEX>, 4.2-20.7 mg/L for <TEX>$COD_{Mn}$</TEX>, 0.2-0.5 mg/L for TP, 2.4-4.5 mg/L for TN, 1.36-3.04 mg/L for NO3--N, 0.13-0.42 mg/L for NH4+-N and 0.82-1.77 mg/L for TKN.
길경익 ( Kyung Ik Gil ) 한국물환경학회 ( 구 한국수질보전학회 ) 2006 한국물환경학회지 Vol.22 No.3
The anaerobic digester supernatant (ADS) with high NH4-N concentration often results in a NH4-N overloading to the mainstream process of municipal wastewater treatment plant (MWTP). The nitrogen removal from the ADS is therefore important in order to achieve a stable mainstream process performance as well as to prevent NH4-N overloading due to ADS. Recently because of several advantages compared to the full nitrification, many works have shown interests in controlling the build-up of NO2-N in nitritation processes. The application of nitritation could save the aeration power compared to the full nitrification processes. In addition, the denitrification of NO2-N could reduce organic carbon requirements compared to the NO3-N denitrification. The purpose of this research was to find out the characteristics of the ADS nitritation and NO2-N accumulating factors from the laboratory reactor study. As a result based on the long-term laboratory experiment, it can be concluded that the degree of nitritation was closely related with the availability of alkalinity, free ammonia (FA), solid retention time (SRT) and solid concentration in the nitritation reactor.