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黃相容(Sang Yong Hwang),孫鍾烈(Jong Ryeul Sohn),禹完基(Wan Gi Woo) 한국환경보건학회 1990 한국환경보건학회지 Vol.16 No.2
Laboratory methods commonly used today are biochemical oxygen demand. chemical oxygen demand, and total organic carbon. Establishment of constant relationships among the various measures of organic content depends primarily on the nature of the wastewater and its source. Of al1 the measures, the most difficult to correlate to the others is the BODs test. because of the problems associated with biological tests The results were summarized as follwos , 1. For typical municipal wastes, however, the SBODs / SCODcr ratio varies from 0.14 to 0.34(mean 0.21). SBODs / STOC ratio varies from 0.35 to 1.19(mean 0.69) 2. Correlation analysis between the SBODs and SCODcr gave good correlation coefficient r = 0.903 and the equation Y = 3.756X + 16,221 was obtained 3. The correlation between the SBOD5 and STOC was well presented with equation Y = l ,070X + 7,637, and also correlation coefficient r = 0.821 4. The correlation between the SCOD , and STOC was well presented with equation Y = 0.256X+5.513 and also correlation coefficient r = 0.816 5. Becaus안 of the rapidity with which the TOC test can be conducted‘ it is anticipated that more use will be made of these tests in the future
하수방류수의 총유기물 및 부유고형물질 동시제거용 섬모필터시스템개발
황상용(Sang-Yong Hwang),이규성(Guy-Seong Lee) 한국환경관리학회 2011 環境管理學會誌 Vol.17 No.1
In this study, a Ciliation (500㎥/day) was used at the N sewage treatment center in Seoul to reuse the treated sewage water. when the sewage treatment conditions are deteriorated, SS and CODCr were test using the water bed test method process and the pollution due to the use of the Ciliumfilter was analyzed through SEM. By using the Disk type ciliumfilter, removal efficiency for SS was 49~92% which enaled the process to maintain the effluent water to be less than 3㎎/L. Removal efficiency of TCODcr was 13~56% due to the solubility organic and that of particle was 90% and 78% for particle size less than 20㎚ and 10~48㎚, respectively.
황상용(Sang-Yong Hwang) 대한환경위생공학회 2004 대한환경위생공학회지 Vol.19 No.4
From September 1, 2003 to November 30, 2004, 20 mineral water wells were selected for some area in east Europe and the study on their water quality was analized. It revealed that mineral water contained considerable quantity of magnesium ions which helps the smooth activities of vascular muscles, nervous systems and protects skins from allergic reactions. It also lowers cholesterol level and contains high concentration of calcium ions which is one of the vital components of teeth and bone like phosphorus. Thus it is concluded that it is not qualified as boiler feed water as it has overall high degree of hardness by the presence of four times content of Mg²+ and Ca²+.
황상용(Hwang-Sang Yong) 대한환경위생공학회 2008 대한환경위생공학회지 Vol.23 No.2
All over the world, the existing process of water purification needs more flocculants and chlorine due to a gradual decline in the quality of source water. Therefore, the problem of the remaining aluminium and DBPs in purified water is on the rise. To solve this problem, the process of membrane filter has recently come into the spotight. This study reaches the following conclusions concerning TMP variation in order to solve the dropping of flux throgh a membrane filter when operating a membrane filter system in the process of water purification. 1. In case that a cohesion-precipitation process was introduced to pre-treatment of a membrane filter, initial TMP was very satisfactory(0.27㎏/㎝) in producing the constantly safe quality of water, 0.04~0.1(mean 0.05) NTU by pouring 2㎎/1 of PACI(10% Al₂ O₃) used for the existing process of water purification in high-density turbidity at a dry or flood season and at occurrence of high algae. 2. As flux increased at 0.5m/day.m, TMP increased 0.05 ㎏f/㎝. 3. As filtering, operation mode of PVDF MF membrane filtering was 48 minutes and 1 cycle of back washing was 42 minutes, flux was increased 1.5m/day.m and TMP increased 0.25~0.27㎏f/㎝. Without back washing, TMP increased 0.03 ㎏f/㎝ per a cycle.
황상용(Sang-Yong Hwang) 대한환경위생공학회 2006 대한환경위생공학회지 Vol.21 No.3
From March 1, 2005 to August 31, 2006 mineral water wells were selected for 13 areas in Southeast Asia (Indonesia, Philippines, Thailand, Singapore) and 20 areas in Northeast Asia (Korea, North Korea, China, Japan) and the study on their mineral water quality was analyzed. - Mineral water quality was the best in Korea. Mineral spring waters in some area of China and North Korea and in the whole area of the Southeast Asia were of poor quality. - The hardness of mineral water was the low in Korea (10~47㎎/L as CaCO₃), Japan (4~66㎎/L as CaCO₃), Geu㎎ang-san North Korea Area (4㎎/L as CaCO₃). Mineral spring water in Thailand, Indonesia (1~97.5㎎/L as CaCO₃) and in the other area (120~1205㎎/L as CaCO₃) were high degree of hardness. - pH value in the mineral water of Southeast Asia (pH 6.7~8.2) and Northeast Asia (pH 5.9~7.9) was up to WHO standard (pH 6.5~8.5). - Fluorine of negative ion was found in 10 mineral waters: Indonesian mineral water "ATARIN"(0.02㎎/L), Thailand mineral water "SIAM" (0.6㎎/L), "MASAFI" (0.02㎎/L), Korean mineral water "SAEMMULNARA" (1.1㎎/L), "SANSU"(0.6㎎/L), "ICIS"(0.3㎎/L), "DONGWON SAEM-MUL"(0.03㎎/L), "PYEONGCHANG" (0.6㎎/L), North Korean mineral water "KUMGANGSAN"(0.1㎎/L), Japanese mineral water "CRYSTAL GEYSER"(0.55㎎/L). However Fluorine in the other 23 mineral waters were not detectable.