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Phosphorus Removal in Pilot Plant Using Biofilm Filter Process from Farm Wastewater
Shin, Sung-Euy,Choi, Du-Bok,Lee, Choon-Boem,Cha, Wol-Suk The Korean Society for Biotechnology and Bioengine 2006 Biotechnology and Bioprocess Engineering Vol.11 No.4
Various environmental conditions affecting total phosphorus removal from farm wastewater in a biofilm filter process were investigated using loess balls and Chromobacterium LEE-38 at a pilot plant. When Chromobacterium LEE-38 was used, the removal efficiency of total phosphorous was approximately 10- or 5-fold higher than that of Acinetobacter CHA-2-14 or Acinetobacter CHA-4-5, respectively. When a loess ball of $11{\sim}14mm$ manufactured at a $960^{\circ}C$ calcining temperature was used, the removal efficiency of total phosphorous was 90.0%. When 70% of the volume fraction was used, the maximum efficiency of total phosphorus removal was 93.1%. Notably, when the initial pH was in the range of 6.0 to 8.0, the maximum removal efficiency of total phosphorus was obtained after 30 days. When the operating temperature was in the range of 30 to $55^{\circ}C$, the maximum removal efficiencies of total phosphorus, 95.6 to 94.6%, were obtained. On the other hand, at operating temperatures below $20^{\circ}C$ or above $40^{\circ}C$, the removal efficiency of total phosphorous decreased. Among the various processes, biofilm filter process A gave the highest removal efficiency of 96.4%. Pilot tests of total phosphorus removal using farm wastewater from the biofilm filter process A were carried out for 60 days under optimal conditions. When Acinetobacter sp. Lee-11 was used, the average removal efficiency in the p-adsorption area was only 32.5%, and the removal efficiencies of chemical oxygen demand (COD) and biological oxygen demand (BOD) were 56.7 and 62.5%, respectively. On the other hand, when Chromobacterium LEE-38 was used, the average removal efficiency was 95.1%, and the removal efficiencies of COD and BOD were 91.3 and 93.2%, respectively.
Phosphorus Removal in Pilot Plant Using Biofilm Filter Process from Farm Wastewater
차월석,Sung-Euy Shin,DuBok Choi,Choon-Boem Lee 한국생물공학회 2006 Biotechnology and Bioprocess Engineering Vol.11 No.4
Various environmental conditions affecting total phosphorus removal from farm wastewater in a biofilm filter process were investigated using loess balls and Chromobacterium LEE-38 at a pilot plant. When Chromobacterium LEE-38 was used, the removal efficiency of total phosphorous was approximately 10- or 5-fold higher than that of Acinetobacter CHA-2-14 or Acinetobacter CHA-4-5, respectively. When a loess ball of 11~14 mm manufactured at a 960°C calcining temperature was used, the removal efficiency of total phosphorous was 90.0%. When 70% of the volume fraction was used, the maximum efficiency of total phosphorus removal was 93.1%. Notably, when the initial pH was in the range of 6.0 to 8.0, the maximum removal efficiency of total phosphorus was obtained after 30 days. When the operating temperature was in the range of 30 to 55°C, the maximum removal efficiencies of total phosphorus, 95.6 to 94.6%, were obtained. On the other hand, at operating temperatures below 20°C or above 40°C, the removal efficiency of total phosphorous decreased. Among the various processes, biofilm filter process A gave the highest removal efficiency of 96.4%. Pilot tests of total phosphorus removal using farm wastewater from the biofilm filter process A were carried out for 60 days under optimal conditions. When Acinetobacter sp. Lee-11 was used, the average removal efficiency in the p-adsorption area was only 32.5%, and the removal efficiencies of chemical oxygen demand (COD) and biological oxygen demand (BOD) were 56.7 and 62.5%, respectively. On the other hand, when Chromobacterium LEE-38 was used, the average removal efficiency was 95.1%, and the removal efficiencies of COD and BOD were 91.3 and 93.2%, respectively.
이상원,이춘희,정증효 釜山大學校 師範大學 1996 교사교육연구 Vol.33 No.-
Palgongsan granite considered to be a rapid cooling shallow-level intrusion, exhibits textural and mineralogical changes from margin toward core. In petrochemistry it is characteristic of I-type granitoid representing calc-alkaline differentiation trend, which is discriminated active continental arc granitoid in tectonomagmatic environment. In Q-Ab-Or-An system norm compositions of the Palgongsan granite are plotted near low-temperature trough, and concentrated on the minimum melt curve (700℃). Palgongsan granite intruded and metamorphosed sedimentary rocks to hornfelses forming contact metamorphic aureoles (average 1.5 km width). Contact aureoles are divided into inner and outer zone, which are respectively biotite and chlorite zone, indicating albite-epidote hornfels facies. The mineral assemblages are chlorite-muscovite in chlorite zone and biotite-muscovite(-chlorite), epidote-chlorite, actinolite-chlorite and actinolite -epidote-chlorite in biotite zone. Metamorphic temperature is as low as to be estimated about 350℃ in chlorite zone and 400℃ or higher in biotite zone.
이채우,조태성,박인범,김상우,안창범,송춘호,윤현민,장경전 대한침구학회 2003 대한침구의학회지 Vol.20 No.2
Objective : The purpose of this study was to evidence the effect of Dong-Shi Acupuncture by improving degree of forty four patients who have received a Dong-Shi Acupuncture therapy at Dong Eui oriental hospital OPD and chiefly complained for neck pain and related symptoms. Materials and Methods: Forty four patients were diagnosed with physical inspection and readiography, and investigated into the effect of treatment sharing before treatment and after 2 weeks and 4 weeks treatment by Dr. Kim's method. Results and Conclusions: The conclusion of this study was that improving degree of forty four patients who have received a Dong-Shi acupuncture therapy for all items and excellence of the Dong-Shi Acupuncture was evidenced.
Automatic Bottle Air Rinser 개발에 관한 연구
이춘만,김대성,김현진 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
This study has been focused on the development of automatic bottle air rinser. It is designed to rinse clean empty bottles prior to filling. The bottles are automatically indexed beneath an air nozzle that has both a clean airjet and vacuum source. The bottle is first given a burst of clean air to loosen any particles from the wall of the bottle. A vacuum sequence follows which removes all particulates into a self contained filter unit. In order to the provide the desired function, analysis is carried out by FEM simulation using FLUENT and CATIA software. The final results of analysis are applied to the design of automatic bottle rinser and the machine is successfully developed.
이동춘,노채균,고성범 嶺南大學校 工業技術硏究所 1996 工業技術硏究所論文集 Vol.24 No.1
In this paper, a novel current control strategy for PWM current source converter is proposed, applying a multivariable state feedback control. In this converter system, a sinusoidal input current, unity power factor, low current ripple are obtained. In addition, fast transient response of dc link current is achieved.
초고층 주거복합건물의 동선체계에 관한 연구 : 초고층 주거복합건물의 수용기능을 중심으로
이성옥,이해욱,김낙춘 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(계획계)
This research aims to identify the social implication of these circulation problems in these high-rise mixed-use projects and to provide a set of guidelines for the solution in planning. The 14 sample projects with more than 31 stories, which are being built as of the year 2000 were selected for the plan investigation. The arrangement of building clusters was identified into six types (plaza, zigzag, enclosed, parallel, radiant, and single types) and the plaza was the most popular type of building arrangement since it is easy to obtain high-quality central outdoor open space with a good view. The High-Rise Mixed-Use buildings were classified into two types, bundled complex type and single g high-rise type, according to their functional capacity. 13 out of 14 cases turned out to be the bundled complex type and the buildings were linked with various architectural elements such as artificial decks, bridges, sunken open space and etc.