http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
역유동층 반응기와 삼상유동층 반응기를 이용한 유기물 제거에 관한 연구
박영식,안갑환,추석열,서근학,송승구 부산대학교 1995 生産技術硏究所論文集 Vol.48 No.-
구형의 섬유상 플라스틱을 media로 사용하여 3상 유동층 생물막 반응기와 역유동층 생물막 반응기로 유기물 제거효율을 비교 실험하였다. 유입수의 SCOD가 1800㎎/L였을 때 역유동층 생물막 반응기와 3상 유동층 생물막 반응기의 제거효율은 각각 94%, 92.5%였다. 유기물 부하율이 2㎏COD/㎥.day였을 때 역유동층 생물막 반응기의 미생물 농도는 2810㎎/L, 3상 유동층 생물막 반응기의 경우는 2300㎎/L 였다. 반응기 부피, 공기유량, media 형태 및 폐수성상이 모두 같은 조건에서는 두 반응기 모두 유기물 제거효율과 미생물 농도 등에서 거의 비슷한 거동을 나타내었다. A number of experiments were conducted to examine the COD removal efficency and the biomass concentration of the three phase fluidized bed biofilm reactor(TFR) and inverse fluidized bed biofilm reactor(IFR) using fibrous plastic ball and synthetic wastewater. When the influent SCOD was 1800㎎/L, SCOD removal efficiency of IFR and TFR were 94% and 92.5%, respectively. When organic loading rate was 2㎏COD/㎥.day, the biomass concentrations of the IFR and the TFR were 2810㎎/L and 2300㎎/L, respectively. When operated at the same conditions on reactor volume, air flow rate, media type and wastewater characteristic, two reactors showed a very similar performance.
Saccharomyces uvarum에 의한 중금속 생체흡착에 관한 연구
안갑환,서근학 한국환경과학회 1995 한국환경과학회지 Vol.4 No.5
The waste biomass of Saccharomyces uvarum, used in fermentation industries to produce ethanol, were studied for their ability to absorb various heavy metal ions. Heavy metal ions studied in this research were Cd, Co, Cr, Cu, Ni and Pb. The order of the sorption capacity was Pb>Cu>Co=Cr=Cd>Ni. The living Saccharomyces uvarum exhibited higher metal-uptake capacity than the dead Saccharomyces uvarum. After we compare the uptake capacity of the Saccharomyces uvarum for individual metal ions with for a mixture of them, the following was observed: in the mixed heavy metal solution the uptake capacity was decreased than the one heavy metal solution. The selective uptake was observed when all the heavy metal ions were dissolved in a mixed solution. The adsorption isotherm modelling was decribed with the Langmuir and Freundlich model. The results were in good agreement with the Langmuir model.
비틀대모자반 , Sargassum sagamianum 을 이용한 Pb 및 Cr 생체흡착 및 회수
서근학(Kuen hack Suh),안갑환(Kab Hwan Ahn),이학성(Hack Sung Lee),이회근(Hwae Geon Lee),조진구(Jin Koo Cho),홍용기(Yong Ki Hong) 한국수산과학회 1999 한국수산과학회지 Vol.32 No.4
Biosorption of Pb and Cr to Sargassum sagamianum was evaluated in the various conditions. An adsorption equilibrium was reached in about 15 min. for Pb and Cr. The uptake capacity was 224.5 ㎎ Pb/g biomass and 77.5 ㎎ Cr/g biomass, respectively. The adsorption parameters for Pb and Cr were determined according to Langmuir and Freundlich model. Biosorption of Pb and Cr was increased with an increase in pH value. Pb and Cr adsorbed by S. sagamianum could be recovered by desorption process with 0.1M HCl, 0.1M HNO₃ and 0.1M EDTA and the efficiency of Pb desorption was above 90%, whereas the efficiency of Cr desorption was below 51%.
Sargassum horneri 를 이용한 Pb^2+ 및 Cr^3+ 생체흡착
서근학,안갑환,조문철 한국환경과학회 1999 한국환경과학회지 Vol.8 No.3
Pb^2+ and Cr^3+ uptake capacity by Sargassum horneri was 185.5㎎ Pb^2+/g biomass and 102.6㎎ Cr^3-/g biomass, respectively. An adsorption equilibria were reached within about 0.5 hr for Pb^2+ and 1 hr for Cr^3+. The adsorption parameters for Pb^2+ and Cr^3+, were determined according to Langmuir and Freundlich model. With an increase in pH values of 2 to 5, Pb^2+ uptake was increased, however Cr^3+ uptake was constant. The selectivity of mixture solution showed the uptake order of Pb^2+>Cu^2+>Cr^3+>Cd^2+. Pb^2+ and Cr^3+ adsorbed by S. horneri could be recovered from 0.1M HCl, 0.1M HNO_3 and 0.1M EDTA by desorption process, and the efficiency of Pb^2+ desorption was above 98%, whereas the efficiency of Cr^3+ desorption was below 34%.
괭생이모자반 , Sargassum horneri 를 이용한 Pb 흡착 및 탈착
서근학(Kuen hack Suh),안갑환(Kab Hwan Ahn),김병진(Byong Jin Kim),조진구(Jin Koo Cho),진형주(Hyung Joo Jin),홍용기(Yong Ki Hong) 한국수산과학회 1999 한국수산과학회지 Vol.32 No.3
Biosorption of Pb to Sargassum horneri was evaluated. An adsorption equilibrium was reached in about 15 min. for Pb und Pb uptake was 185.5 ㎎ Pb/g biomass. When Ca and ㎎ concentration increases in Pb solution, Pb was selectively adsorbed. The Pb adsorbed by S. horneri could be recovered by desorption process, and the desorption efficiency of Pb by 0.1 M HCl, 0.1 M HNO₃, and 0.1 M EDTA was above 95, whereas the elution by 0.1 M NaOH was less efficient in the desorption of Pb. S. horned was reused 6 cycle repeatedly after adsorption/desorption and the sum of uptake was 636.6 ㎎ Pb/g biomass.
Removal, Recovery, and Process Development of Heavy Metal by Immobilized Biomass Methods
Ahn, Kab Hwan,Shin, Yong Kook,Suh, Kuen Hack 한국환경과학회 1997 한국환경과학회지 Vol.6 No.1
Heavy metal adsorption by microbial cells is an alternative to conventional methods of heavy metal removal and recovery from metal-bearing wastewater. The waste Saccharomyces cerevisiae is an inexpensive, relatively available source of biomass for heavy metal biosorption. Biosorption was investigated by free and immobilized-S. cerevisiae. The order of biosorption capacity was Pb>Cu>Cd with batch system. The biosorption parameters had been determined for Pb with free cells according to the Freundlich and Langmuir model. It was found that the data fitted reasonably well to the Freundlich model. The selective uptake of immobilized-S. cerevisiae was observed when all the metal ions were dissolved in a mixed metals solution(Pb, Cu, Cr and Cd). The biosorption of mixed metals solution by immobilized-cell was studied in packed bed reactor. The Pb uptake was investigated in particular, as it represents one of the most widely distributed heavy metals in water. We also tested the desorption of Pb from immobilized-cell by using HCl, H_2SO_4 and EDTA.
양어장에서 고정화된 질화세균군을 이용한 암모니아 질소 제거
서근학(Kuen hack Suh),김용하(Yong Ha Kim),안갑환(Kab Hwan Ahn) 한국수산과학회 1997 한국수산과학회지 Vol.30 No.5
Nitrifier consortium entrapped in Ca and Ba-alginate beads were packed into two reactors and studied for removing ammonia-nitrogen in aquaculture system. The ammonia-nitrogen concentration of the influent was continually kept about 2ppm. At the hydraulic residence time of 0.6 hours, ammonia-nitrogen removal amount of two reactors was about 52.6 and 51.0g NH₃-N/㎥/day, respectively. The ability of adjusting to an impulsive loading which was happened according to variations of HRT was better at Ba-alginate reactor, but its discrepancy was not so large. At the respect of removing ammonium-nitrogen, two reactors showed the similar ability of treating recirculating water.
안갑환,서근학,오창섭 한국환경과학회 1998 한국환경과학회지 Vol.7 No.5
Marine algaes are capable of binding a large quantity of heavy metals. We have investigated the uptake capacity of Pb and Cu by using 22 species of marine algae, collected from Korean coast. Among a variety of different marine algae types for biosorbent potential, Kjellmaniella crassifolia showed the highest uptake capacity of Pb. Metal uptake of Pb and Cu by Kjellmaniella crassifolia increase as the initial concentration rises, as long as binding sites are remained. The metal uptake parameters for Pb and Cu had been determined according to Langmuir and Freundlich model. By increasing pH. Pb uptake was increased and Cu uptake was constant. The maximum uptake capacity of Pb and Cu by Kjellmaniella crassifolia was 437 ㎎/g and 129 ㎎/g, respectively.