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통영시와 양산시의 강우시 합류식 하수관거 월류수(CSOs)에 관한 비교연구
김한석,정병길,정유진,박광현,성낙창 東亞大學校 附設 環境問題硏究所 2004 硏究報告 Vol.26 No.-
The Objective of this study was conducted to investigate the comparison of combined sewer overflows(CSOs) characteristics for rainy season in Tongyoung and Yangsan city. Two sites for the analysis of CSOs were chosen each in the city of Tongyoung, a coastal area, and in the city of Yangsan, an inland area. The analysis of water quantity on CSOs was conducted with Flo-Tote(Ⅱ) and SIGMA 920. For analysis parameters, BOD_(5), COD_(Cг), TSS, T-P, and T-N were analyzed 12 times in a day. In case of Tongyoung, the pollution load of TSS was noticeable since its large permeability coefficient created by unpaved roads and these results caused in the large inflow of earth and sand or solid materials into combined sewers in the event of precipitation.
유동대전에 의한 절연유중의 정전기 방전기구와 대책에 관한 연구
이덕출,박광현,임헌찬,김두식,황명환,육재호 한국산업안전학회 1993 한국안전학회지 Vol.8 No.2
In this paper, it is studied the electrostatic discharge in insulating oil for the purpose of the technical control of the streaming electrification resulted frown the interface between an insulating liquid and a solid. The streaming current increases exponentially with flow rate and in region of lower than 50[℃] but decreases at higher than the same temperature. The phenomena of electrostatic discharge appear at an interface between measuring tank and insulating oil when the seven sheets of gauzos are inserted in electrification apparatus. And those of partial or surface discharge are shown when eight sheets are inserted.