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강용태,송근관 영남대학교 환경문제연구소 2000 環境硏究 Vol.19 No.2
This study was conducted to improve raw and clean water quality using biofilter at the down stream of Nakdong River. The removal efficiency of turbidity, color, KMnO4 consumption, NH4-N and UV254 was 98.5%, 95.6%, 65.2%, 87.2%, 77.1% respectively with biofilter as pre-treatment process. The new advanced water treatment system using biofilter composed with biofiltration, post-ozonation and GAC process without clarifier and rapid sandfilter. The removal efficiency of the new system using biofilter for turbidity, color, color, KMnO4 consumption, NH4-N and UV254 was reached 98.9%, 98.6%, 77.7%, 92.3%, 91.5% respectively. It is equivalent to the removal efficiency of existing advanced water treatment system using pre-ozonation, coagulation, flocculation, clarifier, rapid sandfilter and BAC though the demanded area and coagulant of the new advanced water treatment system using biofilter was decreased about 60% and 70% respectively.
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.
급속여과지(急速濾過池)의 여과속도(濾過速度)와 여재구성(濾材構成)의 연구(硏究) -여과저항(濾過抵抗)을 중심(中心)으로-
강용태,Kang, Yong Tai 대한토목학회 1983 대한토목학회논문집 Vol.3 No.3
지금까지 발표되어 있는 여과공정(濾過工程)의 수학적(數學的) 해석(解析)의 결과(結果)는 범용성(汎用性)이 없고 실용적(實用的)으로 이용(利用)될 수 없는 문제점(問題點)이 있었다. 그러나 여과공정(濾過工程)을 수학적(數學的)으로 표현(表現)하는 것은 장치설계상(裝置設計上) 대단히 중요하기 때문에 본논문(本論文)은 급속여과지(急速濾過池)의 여과공정(濾過工程)을 해명(解明)하기 위하여 여층내(濾層內)의 tracer study의 결과(結果)를 정리한 것이다. 따라서 여과공정(濾過工程)을 해명(解明)하기 위해서 최대(最大)의 문제점(問題點)으로 되어 있던 억류물비퇴적량(抑留物比堆積量)을 직접(直接) 파악(把握)하는 것에 의해 Kozeny-Carman 식(式)을 보정(補正)하여 실제에 활용(活用)될 수 있는 미소여층(微小濾層)의 여과지저항식(濾過紙抵抗式)을 유도(誘導)하였다. 또 조지율(阻止率)과 비퇴적량(比堆積量)과의 상관(相關) model을 제안(提案)하고 이것을 이용(利用)해서 여과방정식(濾過方程式)을 풀고 그 값을 유도(誘導)한 여과저항식(濾過抵抗式)에 대입(對入)하여 전여층(全濾層)의 여과저항(濾過抵抗)을 구(求)하고 그 결과(結果)를 도표화(圖表化)함으로서 여과저항식(濾過抵抗式)을 이론(理論)과 실용(實用) 양면(兩面)에 넓게 활용(活用)될 수 있도록 하였다. In spite of extensive knowledge of the surface chemistry and the transport mechanism in filtration systems, there is still insufficient understanding of the physical characteristics of suspensions and the system components. Because of this, no filtration mechanisms are mathematically generalized to the full extent. The purpose of this paper is to propose experimental equations for the filtration process. using the tracer study in filter layer. Some of results are as follows. (1) The Volume of the specific deposit (${\sigma}$) in filtration was directly measurable using the tracer study without interrupting the filtration. (2) It was also confirmed that the head loss in filtration was greatly in fluenced by the micro-air babbles. (3) The correction coefficient(f) was introduced into the Kozeny-Carman equation in order to apply it for the clogging filter media. The coefficient(f) was experimentally obtained. The total head loss of the filter media is given by next equation. $${\frac{h}{h_0}}={\frac{1}{L}}{\int}^{z=L}_{z=0}f({\sigma})g({\varepsilon}_0,{\sigma})dz$$ $$f=aexp(-b{\sigma})$$ The above equation was applicable without regard to the variation of the suspension concentration, the filter medium diameter, the filter depth, the filtration velocity, and the amount of aluminum in all continuous filtration experiments. (4) The total head loss was graphically generalized assuming mathematical filtration models I II (see fig. 7,8) (5) The total head loss was obtained from the filtration model in the field filtration conditions. (see fig. 9,10)
강용태,김상구 동아대학교 공과대학 부설 한국자원개발연구소 1993 硏究報告 Vol.17 No.2
The configurations of filter bed is important factor in existing water treatment plant because of water purification and operating cost. Therefore this paper proposed the headloss equation abtained from this experiment using the tracer study in filter. Some of results are as follow. 1. The headloss correction coefficient(f)is proposed in order to apply it for the clogging filter media. It is given by next equation. h/h_(0)=1.14exp(-7.42σ)(1-ε_(0)+σ/1-ε_(0))²(ε_(0)/(ε_(0)-σ))³ 2. Most of turbidity materials were captured within 5㎝ from the top of the 0.6㎜ size media on the other hand the removal efficiency of the media which was larger than 1.35㎜ was distributed throughout the bed.
발생기 온도저감 및 고온열수 획득을 위한 Hybrid GAX 사이클 해석
강용태,윤희정,조현철 대한설비공학회 2002 설비공학 논문집 Vol.14 No.2
The objectives of this paper are to develop an advanced GAX cycle named HGAX (Hybrid Generator Absorber heat exchanger) cycle, and to study the effect of key parameters on the cycle performance and the hot-water temperature from the condenser. New types of the HGAX cycle are developed by adding a compressor between the generator and the condenser- Type C (performance improvement and reduction of the generator temperature) and Type D (Hot-water temperature application). The solution temperature in the generator outlet is reduced to 168$^{\circ}C$ with the COP improvement of 19% compared to the standard GAX cycle. The hot-water temperature from the condenser is raised to 106$^{\circ}C$ for panel heating (Ondol heating) application.
玄吉秀,姜龍太 東亞大學校 海洋資源硏究所 1993 硏究論文集 Vol.6 No.2
The objective of this research is to investigate characteristics of leachate treatment by the existing leachate treatment system and to evaluate the effect of the existing system in terms of wastewater reuse. The results presented that the removal rate for BOD, COD, SS, and Nitrogen through granular activated carbon(GAC) adsorption process were more than 95% while ?? and ?? removals were relatively low as approximately 20%. Added membrane process(electrodialysis) to the GAC beds, however, ?? and ?? removals were very effective as more than 98%. Therefore, this indicates that the application of the reuse of treated water by the existing system plus membrane is feasible.