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적조예방을 위한 ASA시스템의 도입 가능성에 관한 연구
강용태,조용현,장성부 東亞大學校海洋資源硏究所 2004 硏究論文集 Vol.16 No.-
To prevent from algal-bloom and red tide outbreak this study was focussed on Biological Nutrient Removal using the novel BNR system, Advanced Step Aeration(ASA) system, which could cope with not only a low level of municipal wastewater but also a high strength of apartment wastewater. Nutrient removals through ASA system were considerably excelent: at influent levels of T-N 40~80mg/l, T-P 4.0~8.0mg/l, respectively, removal efficiencies for T-N and T-P are 70~85% and 90% and effluent level for T-N and T-P are 10~15mg/l and 0.4~0.6mg/l. On the basis of 13℃, nitrification rate(KN) in aerobic tank was calculated to be 0.892 mgN/gMLSSㆍhr. Denitrification rate(KDN) according to C/N ratio from 3.68 to 4.3 and temperature from 13 to 18 ℃ was linearly increased and presented to be from 0.64 to 0.95 mgN/gMLSS ㆍhr. Step-feeding raw wastewater to anaerobic and anoxic tank and using raw wastewater as external carbon source have brought about the improvement of denitrification capacity. Anoxic sludge tank minimized the nitrite and nitrate inhibition in the return activated sludge and maximized phosphorus release through the stable DO control.
오존을 이용한 하수2차 처리수의 처리 및 슬러지 감량화에 관한 연구
강용태,조용현,장성부,최선영 東亞大學校建設技術硏究所 2004 硏究論文集 Vol.28 No.1
Nowadays, most of water source is deteriorating due to depending on surface water more than 90%. New disinfection facilities are urgent because a provision of total coliforms was made newly and have gone into effect since in January 2003 for securing of water source. And waste sludge treatments is an outstanding environment question because of several reasons such as increases of waste sludge, high cost of waste sludge treatment and prohibition of sludge treatment method having been utilized. In this study, specific characteristics of ozone treatment for wastewater effluent and volume reduction of waste sludge were studied with pilot-plant. The results of the study are followed: A removal efficiencies of total-coliforms with ozone dose change of 1.6, 2.6, 3.5, 4.5gO3/m3Water were 73.7, 88.1, 95.6, 97.2% .respectively. And MLSS reduction rate of waste sludge with ozone dose change of 0.2, 0.4, 0.6, 0.8gO3/gSS were 38.0, 50.0, 57.9, 62.0%.respectively. CODMn removal efficiency of that was 50.5, 65.0, 76.6, 82.1% respectively and SV30 reduced 92.6% even if ozone dose was 0.2gO3/gSS. Therefore, it is found that ozone treatment is very effective for sludge volume reduction and solidㆍliquid separation.
해양으로 유입되는 도심 하천의 비점오염물질 특성에 관한 연구
강용태,장성부 東亞大學校 海洋資源硏究所 2005 硏究論文集 Vol.17 No.-
It is now recognized that controlling the pollution entering the rivers and coasts from non-point sources, including agricultural and urban runoffs, is of great urgency. In this paper, Quantity and quality of basins streaming down ocean were surveyed and concentration of biological oxygen demand(BOD), Chemical oxygen demand(COD), Suspended solids(SS), heavy metal, etc. were measured. The results showed that: 1. On dry weather, a quantity of Gamjeon basin is 0.18CMS in the summer but 0.11CMS in the winter. 2. Gamjeon basin's quality was represented that BOD, COD, T-N and T-P was 115mg/L(max), 163mg.L(max), 12.9~27.0mg/L, and 0.40~1.43mg/L. on the other hand the heavy metal was appeared serious pollution. Hakjang was represented that BOD and COD was 15.7~43.0mg/L, 12.0~52.9mg/L respectively. 3. During the wet weather, quantities of Gamjeon and Hakjang were peaked in one hour and pollutant loading was similar. Peak quantity of Gamjeon and Hakjang basin was 18CMS and 25.25CMS. 4. Gamjeon basin's quality was represented that maximum BOD concentration was 250mg/L and DO concentration of Hakjang basin was 0.64~13.2mg/L. Heavy metal concentrations of Eomgung area was over the guide line;Cd and Cr^(+6) were estimated to be 0.1mg/L and 0.197mg/L. 5. It is clear that runoff load by urban non-point source pollutants plays important role in the control and management of non-point sources for the watershed.
한국형 e-Navigation 해사 메시징 서비스의 국제 호환성 지원 방안에 관한 연구
전용식(Yong-Sik Jeon),권해경(Hae-Kyoung Kwon),김푸름(Pu-Reum Kim),유용현(Yong-Hyeon Yu) (사)한국CDE학회 2018 한국CDE학회 논문집 Vol.23 No.4
The Maritime Connectivity Platform(MCP) is communication framework that is currently international cooperation development in e-Navigation project such as SMART-Navigation of Korea, Efficiensea2 of Denmark, Sea Traffic Management(STM) of Sweden. It has emerged to support the efficient and reliable exchange of information within e-Navigation. SMART-Navigation is currently leading the development of Marine Message Service(MMS) within MCP. MCP supports the message exchange without loss in the multi-band communication environments through MMS. MMS supports only the exchange of information within e-Navigation, which requires separate actions on service provider servers or vessel client. Unlike the services of SMART-Navigation, services of international e-Navigation projects are developed without consider use of MMS, a separate measure is required. However, these projects are preceded the SMART-Navigation, so taking separate actions against the services developed in these projects is a hassle. In this study, we suggest a method that RESTful services among the services of these projects can be used MMS.
오존을 이용한 하수2차 처리수의 처리 및 슬러지 감량화에 관한 연구
강용태 ( Yong Tae Kang ),조용현 ( Yong Hyun Cho ),장성부 ( Sung Pu Chang ),최선영 ( Sun Young Choi ) 한국수처리학회 2004 한국수처리학회지 Vol.12 No.2
N/A Nowadays, most of water source is deteriorating due to depending on surface water more than 90%. New disinfection facilities are urgent because a provision of total coliforms was made newly and have gone into effect since in January 2003 for securing of water source . And waste sludge treatment is an outstanding environment question because of several reasons such as increases of waste sludge, high cost of waste sludge treatment and prohibition of sludge treatment method having been utilized. In this study, specific characteristics of ozone treatment for wastewater effluent and volume reduction of waste sludge were studied with pilot-plant. The results of the study are followed ; A removal efficiencies of total-coliforms with ozone dose change of 1.6, 2.6, 3.5, 4.5gO₃/m³Water were 73.7, 88.1, 95.6, 97.2% ,respectively. And MLSS reduction rate of waste sludge with ozone dose change of 0.2, 0.4, 0.6, 0.8gO₃/gSS were 38.0, 50.0, 57.9, 62.0% ,respectively. COD_(Mn) removal efficiency of that was 50.5 65.0, 76.6, 82.1% respectively and SV_(30) reduced 92.6% even if ozone dose was 0.2gO₃/gSS. Therefore, it is found that ozone treatment is very effective for sludge volume reduction and solid liquid separation.