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유동해석을 통한 다중분리막 시스템에서의 유량균등분배 분석
김관엽,남해욱,김윤중,이은수,곽동근 한국막학회 2017 한국막학회 총회 및 학술발표회 Vol.2017 No.05
본 연구에서는 전산유체해석 기법을 이용하여 대용량 막여과 설비 유닛의 유량불균등 현상을 분석하고 이를 해결할 수 있는 개선방안을 도출하고자 하였다.
위장관 간질종양의 최신 지견 : 새로운 개념과 치료 New Concepts and Treatment
김관엽,이진호 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.3
The gastrointestinal stromal tumors (GIST) are reevaluated in two points. One is the new concepts of pathogenesis by molecular biological studies and the other is new drug, Glivec, effective for these diseases. GIST develops through the mutation of KIT protein gene which is transmembrane glycoprotein as functioning of type Ⅲ receptor tyrosine kinase in Cajal cell. Also there are many variations in chromosomes in somewhat constant pattern, which suggest a single clonal origin, such as Cajal cell. Glivec (imatinib mesylate) is protein tyrosine kinase inhibitor especially In platelet-derived growth factor receptor. It controls GIST with 59% partial remission and minimal side effects less than 5% at the small dosage. GIST are the new diseases in view of molecular biologic pathogenesis and the promising entity for the new concept anticancer drug of specific targeting the pathogenesis of the cancer in contrast to previous nonspecific targeting drugs.
정상 성인에서 24시간 위산도 측정 : 생리적 변화에 따른 변화 Influence of the Physiologic Change
김관엽,이진호,최원충,신원창 인제대학교 1998 仁濟醫學 Vol.19 No.2
정상인에 있어서 24시간 위내 산도 검사를 실시하여, 위 내에서의 전극의 위치, 또는 음식물의 섭취 유무, 환자의 자세, 십이지장-위 역류에 따른 생리적인 산도의 변화를 측정 하였다. Objectives: The aim of this study was to determine the gastric pH at different levels in the stomach under varying physiological circumstances. Methods: Simultaneous 24-hour ambulatory gastric pH monitoring was performed with variable positioned electrodes in normal 28 subjects, devided into three groups, to study the influence of food, the supine posture, and physiological duodenogastric reflux on gastric pH in different parts of the stomach. In 10 subjects, simultaneous recording were made from each electrodes positioned 5cm below the manometrically-defined lower border of the lower esophageal sphincter(LES), in eight subjects, electrodes were positioned 10cm below the LES, and in 10 subjects, electrodes were positioned at the antrum. Results: During the daytime fasting period, pH was homogeneous across the stomach with most time being spent between pH 1 and 2. Marked similarities in recorded pH were noted when two probes were placed in the stomach at the same level. indicating regional consistency in the pH of the chyme. Food increased pH most in the fungus, less in the mid-stomach, and at the least in the antrum. At night, when supine, alkaline shifts occurred in the distal stomach, most likely because of physiological duodenogastric reflux. These were commmonly recorded in the antrum but only occasionally in the proximal stomach. Conclusions: Measurement of the gastric pH environment requires standardization of the probe position, of feeding, and of posture, and global measurement of gastric pH requires simultaneous recording in both the proximal and distal stomach.
침지형 MBR 공정에서 응집제가 여과성능에 미치는 영향
김관엽,김지훈,김영훈,김형수 한국막학회 2006 멤브레인 Vol.16 No.3
본 연구에서는 침지형 MBR 공정에서 인제거를 위해 주입되는 응집제가 분리막의 여과성능에 미치는 영향을 알아보고자 하였고, 침지형 MBR에서 분리막 표면의 오염을 방지하기 위해 연속적으로 행하는 폭기가 응집 플록에 미치는 영향을 조사하고자 하였다. 이를 위해 MBR공정의 폭기조 슬러지를 채취하여 jar-test를 실시한 결과와 비교하였다. 실험 결과는 플록 크기와 슬러지 탈수성의 지표로서 비여과저항(SRF, Specific Resistance of Filtration)을 측정하여 비교하였다. 응집제 주입량이 증가할수록 10μm 수식 이미지 이하의 플록의 비율이 저감되었으며 탈수성이 증가하였다. 그러나 jar-test 결과와 비교하였을 때, 폭기의 전단력에 의해 그 효과가 저감된 것을 알 수 있었다. 응집제를 주입한 경우 주입하지 않은 경우보다 운전지속시간이 연장되었다 운전지속시간이 응집제 주입량에 비례하여 증가하지는 않았는데, 이는 연속적인 폭기의 전단력으로 인해 10μm 수식 이미지 이하의 입자가 충분히 저감되지 않았기 때문인 것으로 생각된다. 또한 응집제 주입량이 과도하면 오히려 여과저항을 증가시키는 결과를 초래하는 것을 알 수 있었다. The purpose of this study was to investigate effect of coagulation on filtration performance of membrane in submerged MBR system and influence of continuous aeration to reduce fouling of membrane surface on coagulated floc. For this purpose, aeration tank sludge of MBR system was compared with jar-test sludge. The experimental results were analysed in terms of floc size and SRF (Specific resistance of Filtration). The more alum was added, the more content of floc below 10μm reduced and SRF decreased. But compared with jar-test results, it was found that effect of coagulation on MBR floc was reduced. Operation time of membrane in alum added MBR was longer than that in control MBR. But operation time was not proportional to alum dose. It was thought that the result was reason that floc below 10μm was not reduced sufficiently by shear force of continuous aeration. Moreover it was founded that if alum is added more than proper dose, it brings filtration resistance to increase.
수직형 막여과 정수처리시설의 최적 설계 및 운영방안 도출
김관엽,남해욱,김윤중,곽동근 한국막학회 2015 한국막학회 총회 및 학술발표회 Vol.2015 No.05
본 연구에서는 막여과공정, 오존접촉공정, 활성탄흡착공정, 자외선소독공정 등이 계층형으로 배치된 정수처리 실증시설의 설계 및 운영을 통해 수직형 정수 처리시설의 최적 설계/운영방안을 도출하고자 하였다.