石灰石 添加에 따른 二酸化黃 除去率 向上

김영수,박진식,장성호,장부규,서정민,김장호 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.2

This study was carried out to investigate the performance enhancement of forced oxidation operation on the limestone utilization and SO₂ removal efficiency of the pilot flue gas desulfurization system. The results are as follows : 1. The results of the forced oxidation tests have shown that converting from natural to forced oxidation operation can have a significant effect on both limestone utilization and SO₂ removal efficiency of an FGD system. Conversely, if the limestone utilization is maintained at a constant level, the SO₂ removal efficiency will increase. Conversely, if the pH is held constant, the limestone utilization will increase significantly. 2. This characteristic of a forced oxidation system can translate into lower L/G requirements and, therefore, reduced capital and operating costs for slurry recycle pumps. 3. Forced oxidation operation will provide improved limestone utilization and, therefore. reduced limestone reagent costs.

쓰레기 매립장의 LFG 이용에 관한 기초연구

장성호,이덕생,김수생 동아대학교 환경문제연구소 1995 硏究報告 Vol.18 No.2

In this research, the optimum LFG pilot plant of extraction, purification, and application are selected by economic analysis, constructed and operated for the development of the standard LFG utilizing process process proper to domestic landfill. LFG recovery pilot plant was constructed at the base of the result of optimized design and economic evaluation performed at S,D landfill(landfil1 area : 514,345m², landfill depth : 23-39m, landfill MSW amount : 12,808,317m³, landfill period : 87.6-93.5) in Pusan. It was consisted of four extraction well(two extraction well with 18.5m depth, two extraction well with 10m depth), collection head with 160m length, scrubber with capacity 14m³/min as purification process, and flare stack as burning facilities. And monitoring well was set at 30, 50, 70, 90m far from extraction well for the estimation of influence radius. The following experiments were performed using the predeveloped LFG reconvery pilot plant. First, LFG generation amount and generation rate were estemated from the atom analysis of municipal solid waster in S,D landfill. Second, real LFG extraction rate of some 0-10㎥/min was obtanied from operating of LFG recovery process. Third, influence radius was estimated 85-100m according to varying 407㎥/min extraction rate. Fourth, composition of LFG was detected in extraction well and the before and after of purification process.

유온감압탈수처리한 슬러지의 재이용 가능성에 관한 연구

장성호,김수생 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.2

This study was to experiment, through sewage sludge treatment by Vacuum Frying Method, the sludge composition change before and after treatment, the thermal specific character, and the effects of treatment condition come up to sludge water content. The results are as follows. 1. The contents of crude protein and crude fat were respectively 4.8% and 3.4% before treatment, and those were 18.9% and 12.5% after theatment. 2. According to the results of Thermogravimetric analysis, the temperature ranges of themal decomposition were 290-430℃ and 250-380℃ before and after treatment. According to the results of Derivative Thermogravimetric analysis, the temperature of rapidly mass decreas occur respectively 320℃ and 280 C. For the more proper treatment and reuse of organic wastes, the continuous studies of Vacuum Frying Method are more needed.

축력과 양단 대칭모멘트를 받는 스테인리스 각형강관 기둥의 좌굴내력에 관한 실험적 연구

장호주,서성연,양영성 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.2

This study is a series of experimental investigation on the buckling strengths of eccentrically compressed cold-formed stainless steel square hollow section columns. The principal parameters in this study are slenderness ratios(λ=30, 50, 70) and magnitude of eccentricity e(0, 2.5, 5.0, 7.5, 10cm) on the symmetrical end-moment. Objectives of this paper are to obtain the maximum loads by performing an experimental work and to compare the experimental behaviors with analytical results. The ultimate buckling strength of square section members are evaluated by a numerical method in accordance with the bending moment-axial force(M-P) interaction curves. The behavior of each specimen is displayed in the form of moment-angle(M-θ) relationship. The numerically obtained ultimate buckling interaction curves of beam-columns showed a reasonably good agreement with the available experimental results.

韓國人의 各 臟器組織中 靑酸鹽의 微量分布에 關한 硏究(Ⅱ)

張成吉,金恩浩,金英雲,李鎭勳,柳在薰,權五星,金明德,吳世珍,金由那 內務部 國立科學搜査硏究所 2001 國立 科學 搜査 硏究所 年報 Vol.33 No.-

A/D 변환기를 이용한 신호처리

장성환,유인호 圓光大學校 1992 論文集 Vol.26 No.2

This paper is concerned with measuring of rotation movement signals using micro computer with A/D convertor. The system was consisted of the coil pairs using the electromagnetic method, micro computer, A/D convertor and the data was processed by using the micro computer. Signals of rotation movement were converted to digital data by the A/D converter of the successive approximated type in order to provide the flexibility of the data processing. The A/D converter was controlled by the micro computer and the converted datas was stored on the floppy disk and data was processed to get the velocity and acceleration of the rotation movement. The central difference algorithm was the fittest to process the rotation movement signals and we developed the programs on the basis of the algorithm. Through the data processing, these programs were well done and the numerical values of the velocity and acceleration of the rotation movements were got easily.

유온감압법에 의한 슬러지의 탈수에 관한 연구

장성호,박진식,성낙창,김수생 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.1

This study was to experiment, through sewage sludge treatment by Vacuum Frying Method, the effects of reaction condition come up to sludge water content. The results are as follows 1) On accassion the sewage sludge treatment by Vacuum Frying Method, the effect of pressure come up to water content, the water content decreased when the same reaction temperature and time was lower pressure more than the normal pressure(760㎜Hg), particularly. Since pressure 280㎜Hg increased water content decrease range. Since pressure(250㎜Hg) the water boiling point down sharply a phenomenon and the lower pressure lowered the water boiling point a phenomenon, the same sewage sludge water content evaporated rapidly the lower pressure more than the normal pressure. Accordingly, a close vacuum(40㎜Hg), showed very lower water content when a short reaction temperature and reaction time. 2) On accassion the sewage sludge treatment by vacuum Frying Method, the effect of reaction time come u to sludge water content, at the same reaction pressure and temperature, relatively the water content at a low reaction temperature(90℃, 120℃) decreased small in case of a long reaction time, the water content at a high reaction temperature(150℃, 180℃) decreased rapidly in case of a short reaction time. 3) On accassion the sewage sludge treatment by Vacuum Frying Method, the effect of come up to sludge water content, at the same reaction time and pressure, increase of reaction temperature decreased rapidly the water content.

생활폐기물 처리에 관한 시민 의식조사에 대한 연구 : Food Waste 음식물 쓰레기를 중심으로

장성호,배계선 東亞大學校生命資源科學大學附設 農業資源硏究所 1998 農業生命資援硏究 Vol.7 No.1

A questionary survey was conducted to investigate citizen's attitude to the treatment of food wastes in Miryang city. In this study, collection efficiencies was 87.8%, as 281 individuals among 320 individuals. After volume-base charge system, 86.8% of answers perform source separation and 60.9% of respondents separate everything of recycle goods. The majority of respondents discharge food waste using standard envelope. The biggest problems for deposition of the food wastes are offensive odor and worm for reasons of sanitation. Almost citizens think that the period of deposition suit from two days to three days. More than 90.0% of the citizens recognize that compost product made from food wastes and recognition of the people for the composting and composting facilities was affirmative. Majority of the respondents thought that the administration and the provincial government need activity publicity for the source separation fixation of the food wastes.

축력과 양단 대칭모멘트를 받는 스테인리스 원형강관 기둥의 좌굴내력에 관한 실험적 연구

장호주,서성연,양영성 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.3

This study is a series of experimental investigation on the buckling strengths of eccentrically compressed cold-formed stainless steel CHS(circular hollow section) columns. The principal parameters in this study are slenderness ratios(L_(k)/r = 30, 50, 70) and magnitude of eccentricity e(0, 2.5, 5.0, 7.5, 10㎝) on the symmetrical end moment. Objectives this study are to obtain the maximum loads by performing an experimental work and to compare the experimental behaviors with analytical results. The ultimate buckling strength of CHS members are evaluated by a numerical method in accordance with the axial force-bending moment(P-M) interaction curves. The behavior of each specimen is displayed in the form of moment angle(M- θ) relationship. The numerically obtained ultimate buckling interaction curves of beam columns show a reasonably good agreement with the available experimental results of slenderness ratios(L_(k)/r = 30, 50). But experimental results of slenderness ratios 70 were below M-P interaction curve.

自動車 塗料의 異同識別에 關한 硏究 : FT-Ingrared Microscopy에 關하여

長成吉,金恩浩,李京華,朴河宣 內務部 國立科學搜査硏究所 1996 國立 科學 搜査 硏究所 年報 Vol.28 No.-