담관 낭선암 1례

박건욱,홍기봉,정재열,노명환,한상영,최석렬,신우원,나서희 동아대학교의과대학 1997 동아의대학술지 Vol.9 No.1

정수처리 막분리 Pilot 시스템의 성능 평가

김지훈,김형수,염익태,한기봉 대한상하수도학회 2003 상하수도학회지 Vol.17 No.1

In this study, results of a microfiltration(MF) pilot plant are presented based on 6 months on-site experience. Performance evaluation of the hollow fiber membrane system was focused on two criterions: (i) permeated flux and operation time (ii) treated water quality. The pilot plant was operated in dead-end filtration mode under a constant flux. A module of hollow fiber membranes(polyethylene, nominal pore size: 0.1㎛) was used in this experiment. 15LMH(ℓ/㎡ · hr) operation kept much longer operation time compared with 30 LMH(ℓ/㎡ · hr) operation. After about four months of 15LMH operation, increase of suction pressure were less than 15cmHg and the membrane fouling was not serious. Overall, the results of this study demonstrated that 15LMH operation was a more effective and stable process than 30LMH operation for drinking water treatment.

Sewage Treatment by Biofilm A2O Process

Han, Gee-Bong 가톨릭대학교 자연과학연구소 2003 자연과학논문집 Vol.24 No.-

본 연구는 혐기/무산소/호기 조건의 처리장치에서 성장하는 미생물막을 이용하여 한국의 가정 오수내의 질소제거를 연구하고자 하였다. 실험은 다음과 같은 조건으로 수행되었다: 1) 가지의 각각 다른 내부반송을 조건: 100, 200, 300% 2) 3가지의 각각 다른 CODcr/TKN 비율 : 3이하, 3-4사이, 4이상, 실험결과는 다음과 같았다. 1) 암모니아성 질소의 부하는 0.11㎏NH₄-N/㎥/d부터 0.16㎏NH₄-N/㎥/d 까지 증가시킬 수 있었으며 내부반송율과 상관없이 처리효율이 90% 이상 얻을 수 있었다. 2) 탈질 효율은 무산소 조에서 제일 낮은 내부반송을 조건으로 CODcr/TKN 비가 3 이하일 때 제일 높았으나, 질소제거 효율은 CODcr/TKN 비가 4이상일 때는 내부반송율에 상관없이 비슷한 효율을 얻었다. 3) 각각 다른 내부반송율에서 CODcr/TKN 비가 4이상일 때 총질소제거효율은 80%였다. 4) 유기물 제거에 의한 유출수 처리효율은 체류시간, 내부반송율, 부하율 등과 상관없이 CODcr으로 30㎎/ℓ이하의 수질을 얻을 수 있었다. This study is to investigate the removal of nitrogen contaminant. in korean domestic sewage and septic tank effluent by the biofilm incubated in anaerobic/anoxic/aerobic reactor system. The experiment was conducted in the conditions of the followings: 1) 3 different internal recycle rates such as 100, 200, 300% 2) 3 different CODcr/TKN ratios such as below 3, between 3 and 4, above 4. The results are as follows: 1) ammonia nitrogen loading rate was increased from 0.11kgNH4-N/m3/d up to 0.16kgNH4-N/m3/d , and more than 90% of removal efficiency was obtained regardless of internal recycle ratios. 2) denitrifying efficiency was the highest when CODcr/TKN ratio was less than 3 at the lowest internal recycle rate(100%) in anoxic reactor but nitrogen removal efficiency was similar regardless of internal recycle rate when CODcr/TKN ratio was above 4. 3) total nitrogen removal efficiency resulted in 80% when CODcr/TKN ratio was above 4 at 3 different internal recycle rates. 4) the effluent water quality through the removal of organic contaminants was achieved at less than 30mg CODcr/L regardless of different conditions of detention times, internal recycle ratios and loading rates.

Biodegradation of Nitroaromatic Compounds in TNT Munitions Wastes under Different Metabolic Regimes

Gee Bong Han,William W . Clarkson,Dong Min Kim 대한환경공학회 1993 환경종합 학술대회 Vol.- No.-

Biodegradation of Nitroaromatic Compounds in TNT Munitions Wastes under Different Metabolic Regimes

Gee Bong Han,William W . Clarkson,Dong Min Kim 대한환경공학회 1993 대한환경공학회 학술발표논문집 Vol.1993 No.12

Analysis of Nitrification by Aerated Multilayer Biofilm Developed on the Gas - permeable Membrane

( Gee Bong Han ) 한국물환경학회 1996 한국물환경학회지 Vol.12 No.2

개스투과성 막위에 형성된 미생물막 해석을 위해 컴퓨터를 이용한 해법을 변형 적용하였다. 미생물 막은 균일한 두층의 막이 지지층에 직각으로 형성된다고 가정하였다. 다층 미생물막 형성은 막내외의 기질의 농도에 대한 물질수지 관계를 이용하여 설명하였다. 컴퓨터를 이용한 수치해석으로 모의 실험을 하였다. 자가영양 질산박테리아의 전체적인 미생물 막에 대한 영향 등을 설명하였다. 각층의 미생물막은 각각의 막을 형성하는 미생물 및 기질의 조건 등에 따라 해석되었다. 성숙된 다층 미생물막은 nitrosomonas와 nitrobacter가 위아래 각각의 층에서 우점종으로 해석되었다. A computer model was modified to describe a biofilm distributed on the gas permeable support. The biofilm was assumed to grow in the direction perpendicular to the support as two homogeneous layers. Derivation and development of the multilayer biofilm model was illustrated by describing mass balance equations on substrate concentrations within the biofilm and reactor bulk liquid. A numerical evaluation was implemented on a computer to obtain simultaneous numerical solution of applicable differential equations. The equations described mass balance on biomass and substrates under non-steady state conditions and provided an illustration to indicate the effect of parameter and reactor condition of autotrophic nitrifiers to overall biofilm reactions. Model behavior was discussed according to the performance of each biofilm layer. Spatial distribution of homogeneous microorganisms and substrates in the film were described in each condition of developed layer. The completely developed multilayer biofilm included inner and outer layer dominated by nitrosomonas and nitrobacter respectively.

Ultrafiltration for activated sludge separation in wastewater treatment system

( Gee Bong Han,Yeon Taek Rim,Oh Sang Kwon,Jeong Beom Seo,Yong Seok Kim,Jae Keun Ryu ) 한국물환경학회 1997 제6차 국제수질보전학회 아시아 태평양지역 학술회의 Vol.2 No.-

Removal of TNT and its Biotransformation Products under Sequential Anaerobic/Denitrifying Conditions

Gee Bong Han,William W . Clarson 대한환경공학회 1996 Environmental Engineering Research Vol.1 No.1

Nitrogen Removal Comparison in Porous Ceramic Media Packed-Bed Reactors by a Consecutive Nitrification and Denitrification Process

Gee Bong Han,Mi Hee Woo 대한환경공학회 2011 Environmental Engineering Research Vol.16 No.4

Biological nitrogen removal, using a continuous flow packed-bed reactor (CPBR) in a consecutive nitrification and denitrification process, was evaluated. An apparent decline in the nitrification efficiency coincided with the steady increase in NH₄ +-N load. Sustained nitrification efficiency was found to be higher at longer empty bed contact times (EBCTs). The relationship between the rate of alkalinity consumption and NH₄ +-N utilization ratio followed zero-order reaction kinetics. The heterotrophic denitrification rate at a carbon-to-nitrogen (C/N) ratio of >4 was found to be >74%. This rate was higher by a factor of 8.5 or 8.9 for NO₃ --N/volatile solids (VS)/day or NO₃ - -N/m3 ceramic media/day, respectively, relative to the rates measured at a C/N ratio of 1.1. Autotrophic denitrification efficiencies were 80-90%. It corresponds to an average denitrification rate of 0.96 kg NO₃ --N/m3 ceramic media/day and a relevant average denitrification rate of 0.28 g NO₃ --N/g VS/day, were also obtained. Results presented here also constitute the usability of an innovative porous sulfur ceramic media. This enhanced the dissolution rate of elemental sulfur via a higher contact surface area.

축분자원화물 발생 및 배출부하 원단위 특성

한기봉(Gee-Bong Han),이영신(Young-Siu Lee),임재명(Jai-Myug Lim) 유기성자원학회 2008 유기물자원화 Vol.16 No.4

돼지의 분뇨 발생량을 측정한 결과, 3계절과 생체 중량을 고려한 평균 분뇨 발생량은 분이 1.49kg/head/d, 뇨 3.08kg/head/d로서 총 4.57kg/head/d가 발생하였다. 오염물질 항목별 발생부하 원단위는 BOD 199.5g/head/d, CODCr 413.5g/head/d, 질소 27.8g/head/d, 총인이 5.3g/head/d로서 BOD를 제외한 기타 오염물질의 발생부하원단위는 기존 문헌상의 값과 유사하게 나타났다. 한우의 경우 분 발생량은 10.9kg/head/day 뇨 발생량은 3.3kg/head/day 으로 조사되어 농림부(2000)의 조사결과보다 다소 적게 나타났다. 젖소의 경우 분 발생량은 24.6L/head/day 로 다른 기관과는 차이가 났지만, 환경부(2006)의 자료와는 비슷하게 나타났으며, 뇨 발생량은 10.5L/head/day 로 농림부(2000)와 축산기술연구소(2000)보다는 높았지만, 환경부(2006)와 국립환경연구원(1986)과 한국과학기술원(1990)보다는 다소 낮게 조사되었다. 닭의 오염물질 배출량 및 농도분석 원단위를 통하여 산출된 배출부하 원단위는 사육두수 및 사료의 종류, 분의 처리방법의 상이함에 의해 산란계에서 높게 나타난 것으로 판단된다. 배출부하 원단위 중 사슴의 경우 기존의 문헌보다 높게 측정된 것은 사슴의 축종별 체중과 오염물질 발생량의 차이에 의한 것으로 판단된다. The generation amounts of manure and urine were total 4.57kg/head/d of 1.49kg manure/head/d and 3.08kg urine/head/d with consideration of 3 seasons and live weight. The finalized mean unit load generation of filth were estimated at BOD 199.5g/head/d, CODCr 413.5g/head/d, T-N 27.8g/head/d, T-P 5.3g/head/d with consideration of seasons and the type of stalls. The unit load generation of manure and urine from korean cow were analyzed as 10.9kg/head/day and 3.3kg/head/day, respectively. The unit load generation of manure from milch cow was analyzed to be 24.6L/head/day which was similar to the report of MOE(2006). The urine generation, 10.5L/head/day, was higher than the results from MOA(2000) and NIAR(2000), but was lower than the results from MOE(2006), NIER(1986) and KIST(1990). The unit load generation from egg layers estimated by discharged amount and concentration analysis increases in due to the difference of planting head numbers, feed stuffs and manure disposal. In case of deer unit load generation by herbivora were calculated to be higher than data from existing references because of the gap between weight per livestock and the generation amounts of manure and urine.