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閔庚碩,安榮浩,金弘泰 慶北大學校 1992 論文集 Vol.52 No.-
For the effective management of industrial wastes, it is necessary to evaluate these characteristics. This analytical investigations were carried out to study on the characteristics of industrial wastes in Taegu and Kyungpook region. In order to carry out this study, the basic data were collected from Ministry of Environment, a Statistical Yearbook of Korea, and the Taegu Chamber of Commerce and Industry. The conclusions from this study are as follows: 1) Total number of generation companies and generation quantity of industrial wastes were 2, 199 and 7,599,913 ton/year (about 20,822 ton/day) respectively. Among them, specified and general wastes were 3.1% and 96.9% respectively. 2) The self-disposal, commission disposal and storage for industrial wastes were 56.9%, 411.1% and 2.0% respectively. 3) The future generation quantity of industrial wastes was calculated with the future production rate of generation companies. In 2005, the generation quantities of industral wastes are 16,970,832 ton/year, and the disposal requirement are 12,646,259 ton/year.
민경석 남서울대학교 공학연구센터 2003 공학연구 Vol.4 No.-
Design VT(Value Engineering), which saves LCC(life cycle costs)and enhances function and EVMS(Earned Value Management System), that manages earned value in an integrated form need to be firmly established in order to enhance effiency. In this regard, this paper thoroughly analyzed the basic concepts og Design VE and EYMS and the case studies of its application in the U.S. and Japan. In order to legally establish CVS, official certification process should be adopted. There should also be an institutionalized standard in certifying VE companies. Mandatory check period in design VE, incentives for checking, practical VE educations is also needed. EVMS is the main factor in assessing the achievements of the project induding the work process and cost information management. In Korea, EVM is applied to lump sum contract system, making it difficult to acquire reliable information on real cost. Therefore, EVM should be applied to both cost plus fee system and lumps sum contract system.
閔庚碩,金弘泰,姜玉熙 慶北大學校 1991 論文集 Vol.51 No.-
This study was conducted to show the possibility of application of anaerobic digestion process in low temperature. Laboratory single-stage anaerobic digester was operated at 15 to 80 days' HRT at the temperature of 15℃, 20℃, 25℃ and 35℃. The results of this study indicated that the organic removal efficiencies and gas productions were remarkably decreased in low temperature. Despite of the low organic loading of 0.67 ㎏-COD/㎥·day at 15℃ the gas production was very poor as 0.16㎥CH_4/㎏COD removed. The observed maximum F/Mv ratio which would get the organic removal efficiencies of 70% and 60% respectively at the temperature of 20℃ and 15℃ were 0.1 ㎏COD/㎏MLVS·day. The substrate removal rates(Km) had a tendency to become larger at higher temperature, and were critical at the temperature of 20 to 25℃.