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水源汚濁에 따른 淨水方法의 改善에 관한 硏究 : 藥品沈澱을 中心으로 With Reference to Chemical Sedimentation
姜龍太 동아대학교 환경문제연구소 1984 硏究報告 Vol.7 No.2
The improvement of the clean water processes in reference to chemical sedimentation has been studied. The results are as follows (1) The more decreases G^(*) which is optimum mixing intensity, the more increases T which is flocculation period. This relationship is given by next equation. (G^(*))^(2.7) T= K (2) The residual turbidity which was obtained from using of G^(*)for each flocculation period, T decreases as T increase; however, the decreasing rate diminishes about 20min of flocculation period. (3) G^(*)has shown the phenonenon of the mechanism of erosion at the higher value of 25sec^(-1). (4) The aluminium dosage by K value has been more effective than the aluminium dosage of Jar-Test in flocculation and residual turbidity of the sedimentation basin and rapid filter.
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강용태 대한설비공학회 2004 설비저널 Vol.33 No.3
흡수식 사이클을 이용한 에너지의 장거리수송 기술을 소개하고 경제성평가 결과를 제시한다. 현재 에너지수요 측면에서 가장 높은 증가율을 보이고 있는 것이 바로 대도시 및 산업단지의 냉$.$난방 및 급탕용 에너지이다. 냉$.$난방에 사용되는 에너지는 10$0^{\circ}C$미만의 저온으로서 고열원 에너지인 화석연료의 사용은 에너지사용 면에서 비효율적이다. 따라서 산업지 역에서 버려지는 폐열원등의 각종 미활용에너지를 이용하여 냉$.$난방부하를 충족시킬 수 있는 에너지 절약형 시스템의 개발이 매우 중요한 과제로 대두되고 있다. 일반적으로 미활용에너지 및 폐열에너지 공급지역은 소비지역으로부터 멀리 떨어져 있다. 지금까지 흡수식시스템은 냉동 및 냉방의 개념에서 기술개발 및 실용적운전이 이루어져 왔으나, 본 논문에서는 흡수식시스템을 이용한 에너지의 장거리수송 및 변환 기술을 소개하고자 한다.
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강용태 한국수처리기술연구회 1995 한국수처리학회지 Vol.3 No.4
The lower reaches of the Nakdong River, the longest river in Korea, is located on the water supply source for population of 10 million in Pusan Metropolitan City and Kyeongsang Namdo and a base of various industries. From the upper and the middle reaches of the river, the discharge of the wastewaters not adequately treated by existing secondary treatment plants have contaminated the river water and the estuary of the river through eutrophication; the existing plants consisted of the following liquid-stream unit processes: screening, grit removal, flow equalization, primary clarification, conventional activated sludge process (CASP) and disinfection (chlorination). This leads to a shortage of water resources as well as a coastal contamination. In order to solve these problems, this research proposed an advanced wastewater treatment systems such as Advanced Step Aeration (ASA) and Advanced Flocculation-Clarification-Stabilization plus Biofilm Filteration (AFB) system. To implement the advanced wastewater treatment processes, the existing secondary treatment processes may require modifications and the addition of adequate processes which can achieve the desired levels of nutrient removal such as nitrogen and phosphorus. The advanced treatment systems were divided into three functional zones; anaerobic, anoxic, and oxic (aerobic) conditions. We also laid out a scheme to increase the self-purification potential of the river through the reuse of the effluent from the FCS system plus reverse osomsis (RO) membrane with pretreatment unit, which is being used as part of a process to reclaim water from municipal secondary effluent containing salines.
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강용태,원태준,한상윤,고영발,박경덕 東亞大學校 建設技術硏究所 2008 硏究論文集 Vol.32 No.1
The wastewater from textile industry typically containing high alkalify, salts, organic matter, and high color. Textile wastewater is usually treated by anaerobic-aerobic activated-sludge process. The activated-sludge process is effective the reduction of organic matter, but generally does not remove color. Ozone process is one of the most effective process in removal of color for the textile wastewater. Ozone has a strong oxidized dissolution of organism, deceleration, deodorization, fumigation, etc., regarding to water. This study focused on the color removal of textile wastewater. In this study, textile wastewater was treated strongly with ozone at 650mg/hr and the flow rate through ozone contact tank was adjusted to 5L/min. In an application Ozone treatment, Color was generally decreased with time, however, COD removal effect was not that good. In this study, the removal efficiencies of CODcr and Color were 23.5%, 80.4% respectively.
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ASA시스템을 이용한 합병정화조의 개선 및 경제성 평가에 대한 연구
강용태,김화석 東亞大學校 建設技術硏究所 2001 硏究論文集 Vol.25 No.2
Most of existing combined septic tanks of household wastewater and night soil have been treating medium or small scale domestic wastewater by means of activated sludge process. But this process is mainly organics-removed process such as BOD and SS. So nitrogen and phosphorus which is the main issues of eutrophication are not properly treated in this process. Therefore, in order to treat nitrogen and phosphorus stably, in this study, retrofical combined septic tank including sludge stabilization basin is applied to a small domestic wastewater treatment facility and treatment efficiencies of organic matter and nutrients and economics in this process are investigated. As a initial operation results of Activated Sludge(AS) process and Advanced Step Aeration(ASA) process applied as combined septic tank, SS and COD removals in ASA process compared to AS reached the steady state in a short term. T-N and T-P removals in ASA process is from fifteen to twenty percent higher than those of AS process. Results investigating the economics of ASA process have it that in case of comercializing ASA process as a small treatment plant(such as FRP tank) it is described that ASA process is to be saved to the degree of from ten to fifty percent in compared with other methods.
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최초 침전지를 대체하기 위한 고속생물막 침전지의 특성에 관한 연구
강용태,장성부,조용현 동아대학교 건설기술연구소 2003 硏究報告 Vol.27 No.1
It is not easy to find reasonable area for construction of wastewater treatment facility. and biological treatment such as a conventional activated sludge process can't remove non-point source pollutant in initial rainfall, sufficiently. So if we use physical treatment and disinfection process, combined sewer overflows don't cause significant pollution. In this study, to reduce area of wastewater treatment facility, the rapid biofilm clarifier was configurated and its characteristics were analyzed according to the velocity of filtration and cycles of backwash. Specific characteristics of the rapid biofilm clarifier with 50 ㎥/d of volume were represented that Turbidity and SS removal rate was 30.2%, 30.9% respectively, and that of BOD and COD was 22.0%, 21.0% without regard to change of quality of raw water. By comparing the rapid biofilm clarifier and clarifier of conventional activated sludge process with having 50 ㎥/㎡·d, of surface-loading rate and 2.0 m of depth, we could know the rapid biofilm clarifier could reduce area of clarifier 11 times as much than that of conventional activated sludge process. Cycle of backwash was represented as 24, 18, and 24 hours when velocity of filtration was 222 ㎥/㎡·d, 333 ㎥/㎡·d, and 555 ㎥/㎡·d, and BOD. SS biologically removed in the rapid biofilm clarifier was 342.80, 346.82 g/d, 258.08, 222.72 g/d, and 143.36, 136.52 g/d respectively.
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