RFID와 얼굴인식을 이용한 위해물 관리에 관한 연구

추정호,이재용,강대성 東亞大學校 附設 環境問題硏究所 2007 硏究報告 Vol.29 No.1

It prevents the problem beforehand such as second infection by an illegal disposal of the waste which is harmful for people, can solve the real problem caused by management and disposal of the waste, using the RFID that is kernel technology of the next generation in this paper. At first, it is possible to prevent managers' impure intention beforehand, using the authentication card that is storing managers' bio-information who is managing the hazard material. Also it suggests efficient solution that can offer better environment that previous managers' working environment, applying the RFID system to every stage, from the first point of the occurrence time of the waste modeled on general material distribution process to the final processing stage.

외기조건변화에 따른 전열교환 환기시스템의 성능평가 및 운전방안에 관한 연구

이정재,김 광 현,박 미 지 東亞大學校 附設 環境問題硏究所 2007 硏究報告 Vol.29 No.1

Recently, it has been revising regulation of ventilator installation and detail regulation the secures comfortable & safety indoor air quality(IAQ) and obligated establishment of heat recovery ventilator in new apartment building. In this study, we offers operation and a plan of heat recovery ventilator to energy saving by measure efficiency the come out from outdoor conditions and comparing & analysis the energy saving effect. As a result of in this study was as follows : In case, we think that if it do not show that the upper than average of 30 percents absolute humidity in spring and autumn, it should profitably operation "by-pass mode". (2) Energy saving effect appears the heat recovery ventilator show widely rate ratio compared to constant air volume system.

Kinetic Feature for Hydrolysis of N-benzoyl-2-phenylimidazole

Lee, Jong-Pal 東亞大學校 附設 環境問題硏究所 2007 硏究報告 Vol.29 No.1

The hyclroysis reaction of N-benzoyl-2-phenylirIUdazole have been investigated spectrophometrically in water contairung O.5M with KCI at 25°C. H₃O+ cataIyzed reaction below pH 6 is related with mono protonated species and diprotonated species, suggesting that the mono protonated species is quiet stabilized by the phenyl substituent of the leaving group, whereas OH- catalyzed reaction might be proceeded through tetraheclral intermediate and the rate determining step seems to be change with pH. Appearent pKa value was 5.4.

용매추출에 의한 Propionic acid회수에 관한 연구

김재경,김영규,김태식,한상훈,박동원 東亞大學校 附設 環境問題硏究所 2004 硏究報告 Vol.26 No.-

We studied on the phase equilibrium of quaternary liquid-liquid extraction system containing propionic acid-water-binary solvents at 25℃, 1atm. o-Xylene and 1-butanol were used as binary solvents. Binodal curve, tie-line, distribution and selectivity for the quaternary system have been determined in order to investigate the effect of using binary solvent in extracting propionic acid from aqueous solution. And these experimental tie-line data were also compared with the values predicted by UNIFAC model. It was shown that UNIFAC model is capable of predicting the compositions in these quaternary systems within an average RMSD of 1.13mol%.

토양에서 클로르피리포스의 동력학적 거동

유현철,신남철,우성훈,박승조 東亞大學校 附設 環境問題硏究所 2004 硏究報告 Vol.26 No.-

We have investigated physicochemical characteristics and behavior of chlorpyrifos(CPF) in the agricultural soil, soil + dry waste food(DWF) and soil +manure. Experiments were accomplished biological degradation of samples loaded with chlorpyrifos in incubator at 27℃ during 30days in laboratory. In this study, Sample containing soil + manure has shown to be better biological degradation than sample of soil + DWF. The kinetics of chlorpyrifos oxidation catalyzed by agricultural soil, soil + DWF, and soil + manure can be described by Henri-Michaelis-Menten equation, V=(Vmax)/( Km+ C), where Vmax is the maximum velocity and Km the concentration of the substrate(C) corresponding to an initial(V) half of Vmax. The value of Vmax and km is 0.0588㎍CPF/g.soil.hr and 7.3529㎍CPF/g.soil in agricultural soil, 0.0601㎍CPF/g.soil∙hr and 4.4117㎍CPF/g.soil in the soil loaded DWF and 0.0890㎍CPF/g.soil∙hr and 4.2818㎍CPF/g.soil in the soil added manure. Therefore the order of Vmax. were Manure> DWF> Agricultural soil.

분변토 첨가에 따른 토양중의 파라치온의 거동

허창두,신남철,우성훈,박승조 東亞大學校 附設 環境問題硏究所 2004 硏究報告 Vol.26 No.-

The aim of this study was investigated with the behavior of parathion adsorption and degradation efficiency of parathion in various samples loaded with earthworm casting. Adsorption capacity of parathion in loam soil was better than clay loam. Degradation of parathion was 70 percent in loam and clay loam soil to time but samples was loaded 5% casting, L0C5 and CLC5 had shown 90 percent degradation. We found that parathion was leachers pesticide as groundwater ubiquity score (GUS) was more than 4.0.

피혁폐기물 활성탄을 이용한 페놀 흡착

박승조,남정광,김정섭,박정훈 東亞大學校 附設 環境問題硏究所 2007 硏究報告 Vol.29 No.1

Phenol removal efficiency was 65-70 percent according to the results of phenol adsorption experiment loaded with activated carbon derived from leather waste by chemical activation with K₂CO₃ [ACLW], but phenol removal efficiency was 100 percent added with commercia1 activated carbon [AC]. Phenol adsorption experiment reacted with the phenol solution containing 1.25, 2.50, 5.00, 6.25 g/L during 90 minutes. However removal efficiency of Blue 79 was 100 percent loaded with waste by chemical activation with K₂CO₃ [ACLW] and removal efficiency was poor added with commercial activated carbon [AC]. Concentration of Blue79 [2-Bromo- 4,6, dinitroaniline-3-Bis-(2-acetoxyethylene) amino-p-aceto pheneridide] was 40 mg/L.

자동차용 원주가압형 브레이크 디스크의 온도분포에 관한 연구

김형훈,이성욱,한동섭,한근조 東亞大學校 附設 環境問題硏究所 2007 硏究報告 Vol.29 No.1

In a vehicle, the weight is related to fuel efficiency consiclerably. Especially, decrease in unsprung mass of suspension has an effect on not only dynamic characteristics but also increasing fuel efficiency. In this study, we suggest newly formed brake disk which is declined the weight in order to improve its fuel efficiency of vehicles. Ths newly proposed concept has been verified using Thermal-Analysis along with comparative analysis with the existing disk.

유류분해 균주의 복합배양에 의한 유류분해 특성

이상철,최용락 東亞大學校 附設 環境問題硏究所 2004 硏究報告 Vol.26 No.-

We investigated biosurfactant produced by complex culture of B. subtilis A8-8 and B. atrophaeus DYL130. The A8-8 and DYL130 producing biosurfactants were isolated from soil samples and identified as B. subtilis A8-8 and B. atrophaeus DYL130 by 16s rDNA and gyrA nucleotides sequence analysis. The surface tension of complex culture filtrate of decreased from 55 to 32 mN/m. Emulsification activity and stability of crude biosurfactant measured by using water-immiscible hydrocarbons and oil as substrate. Maximum emulsification activity and stability was obtained from kerosene and soybean oil, respectively. Biosurfactants by complex culture more efficient than biosurfactant by simple culture of A8-8 and DYL130, respectively. Also, the emulsifying activity and stability of the biosurfactant showed better than the chemically synthesized surfactant. (SDS, Span 85). The biosurfactants produced by complex culture had strong properties as an emulsifying agent and as an emulsion-stabilizing agent.

다양한 생물학적 하수처리공정에서의 다환방향족탄화수소류(PAHs)의 제거특성

정진희,이지현,노지희,김한석,최호은,박출재,정병길 東亞大學校 附設 環境問題硏究所 2008 硏究報告 Vol.29 No.1

Polycyclic aromatic hydrocarbons (PAHs) can be formed both natural and anthropogenic processes. Both sources are contributors of hazardous compounds, but anthropogenic sources are considerably more damaging to the environment. The purpose of this research obtains a primary data base to treat PAHs-contaminated sewage sludge effectively and properly by figuring out concentrations and origins of PAHs which load in influent of sewage treatment plant. During the experiment period from April 2007 to June 2007, concentrations of PAHs in influent, effluent and dewatered cake at 5 different sewage treatments at City were analysed by using a gas chromatography/mass spectrometer(GC/MS). The volume of samples from influent and effluent was 2 liters. The weight of sample from the dewatered cake was 500g. Ranges of concentrations of PAHs in influent, effluent and dewatered cake were 72.3-83.9 μg/L, 1.1 -6.8 μg/L and 2,669.6-3,491.5 μg/kg respectively. The most abundant compounds of PAHs were fluorene and phenanthrene for all sewage treatment plants. The ratios have been used extensively to distinguish petrogenic or pyrogenic sources of PAHs in the dewatered cake at 5 different sewage treatment plants. It was not easy to di stinguish between petrogenic and pyrogenic sources of PAHs because the PAHs contained both characteristics. 본 연구에서는 하수처리장으로 유입되는 PAHs 의 배출 원을 파악하여 생물학적 처리에 의해 처분되는 하수 슬러지의 경로별 유입 PAHs 의 배출량 및 농도을 추정한 결과 다음과 같은 결론을 얻을 수 있었다. 1. 하수처리장 유입수, 방류수 및 탈수케잌 의 PAHs 농도는 각각 72.3~83.9 μg/L,1.1~6.8 μg/L, 2,669.6 ~ 3,491.5 μg/kg 의 범위를 나타내 었다. 2. 유입수와 탈수케잌 의 경우 모든 하수처리장에서 PAHs 중 각각 fluorene과 phenanthrene 이 가장 높은 농도를 나타내었으며,공장폐수가 유입되는 하수처리장의 경우 벤젠고리 5 - 6개의 고비점 화합물들이 가정하수가 유입되는 하수처리장 에 비하여 다소 높게 나타났다. 3. 모든 하수처리장에서 PAHs 중 저분자량의 LPAHs 제거효율은 85.0% 이상을 나타내었으며,이는 활성슬러지법을 이용한 미생물에 의한 분해로 판단된다. 그러나 고분자량의 HPAHs 제거효율은 활성슬러지법만으로는 67.3% 정도로 낮아 2차 처리가 필요할 것으로 판단된다.