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토양 경작법을 이용한 유류오염토양 정화사업 타당성 연구
조은혜,류혜림,신도연,김영진,최용주,남경필,Jho, Eun Hea,Ryu, Hyerim,Shin, Doyun,Kim, Young-Jin,Choi, Yong Ju,Nam, Kyoungphile 한국지하수토양환경학회 2013 지하수토양환경 Vol.18 No.2
The landfarming treatment for the remediation of the petroleum contaminated soil at the returned U.S. Military bases was investigated in this study. Specifically, the bioaugmentation performance using various commercially available petroleum-degrading bacteria was evaluated and the directions for enhancing the performance of the landfarming treatment were suggested. The environmental factors of the soils at the returned U.S. Military bases chosen for remediation indicate that the landfarming treatment can be used as the remediation technique; however, the addition of nitrogen or phosphorus is required. The lab-scale landfarming treatment tests using the model soil and the site soil showed that the degradation efficiency was greater with the model soil than the site soil and that the treatment performance was not affected by the number of bacteria present in the soil in the range of $10^6-10^{12}$ CFU/g. These results suggest that the successful landfarming treatment depends on the petroleum degradability of bacteria used and the environmental conditions during the treatment rather than the number of petroleum-degrading bacteria used.
Uni-flow type vortex tube의 저온공기유량비 변화에 따른 미세입자 분리특성 해석 연구
서원준(Wonjun Seo),손성진(Seongjin Son),류혜림(Hyerim Ryu),임석연(Seokyeon Im) 한국자동차공학회 2022 한국자동차공학회 지부 학술대회 논문집 Vol.2022 No.5
Vortex tube shows excellent energy separation effect and is currently being used as a cooler in the industrial field. In addition, if the vortex tube uses an internal flow, a centrifugal effect similar to that of a cyclone dust collector can be obtained. However, studies on the separation of solid particles utilizing the internal flow characteristics of the vortex tube are insufficient. In this study, to utilize a vortex tube for fine particle separation, numerical simulations were used to compare and analyze the fine particle separation efficiency according to the uni-flow type cold flow ratio. As a result of the simulation, all particles were discharged to the high temperature outlet end along Hie tangent of the tube wall without the effect of cold flow fraction and particle size.