http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
공기 양정(air lift) 펌프를 응용한 슬러지 배출장치에 대한 연구
안갑환,박영식 한국환경과학회 2004 한국환경과학회지 Vol.13 No.10
Sludge discharger applied the principle of the air lift pump was investigated experimentally for the different design(diameter of discharge pipe, diameter and height of the inside and outside wall) and operating parameters(air flow rate, water level). And it was conducted that performance comparison about sludge discharger and conventional air lift pump. The result indicated that discharged liquid were increased with the increase of air flow rate and water level and decrease distance between inside and outside wall. The discharge pressure was increased with an increase of air flow rate and a decrease of the diameter of the discharge pipe, for both the sludge discharger and the airlift pump. The discharge pressures of the sludge discharger were 3-6 times higher than those of the air lift pump.
폐 슬러지를 이용한 Rhodamine B의 생체흡착시 반응특성에 관한 연구
이창한,안갑환,송승구 한국환경과학회 2004 한국환경과학회지 Vol.13 No.7
The properties of biosorption of dve(Rhodmine B) was investigated to figure out the effects of temperature as a function of dye concentration and sludge concentration by the Langmuir and Lagergen adsorption model. It was found that the uptake capacity of biosorption was increased at low temperature. The Langmuir adsorption model was found suitable for describing the biosorption of the dye. The experimental results indicated that the dye uptake process followed the pseudo-first-order kinetics.
GF/C에 고정된 TiO₂와 유동충 반응기를 이용한 Rhodamine B의 광촉매 탈색
박영식,안갑환 한국환경과학회 2003 한국환경과학회지 Vol.12 No.12
The photocatalytic oxidation of Rhodamine B (RhB) was studied using immobilized TiO₂ and fluidized bed reactor. Immobilized TiO₂ onto GF/C was employed as the photocatalyst and a 30 W germicidal lamp was used as the light source and the reactor volume was 4.8 L. The effects of parameters such as the amounts of photocatalyst, initial concentration, initial pH, air flow rate and anion additives (NO₃^(-), SO₄^(2-), Cl-, CO₃^(2-)) competing for reaction. The results showed that the optimum dosage of the immobilized TiO₂ was 40.0 g/L. Initial removal rate of immobilized TiO₂ was expressed Langmuir - Hinshelwood equation.
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.
이학성,문광용,안갑환,서정호 한국환경과학회 2004 한국환경과학회지 Vol.13 No.10
The relationships between subjective symptoms of toluene exposed workers and concentration of their urinary excretion of hippuric acid were investigated. The exposed groups of 146 workers exposed to toluene and the control groups of 47 workers have never been exposed to toluene in Ulsan area were selected and studied. Hippuric acid was measured by HPLC, and counts of blood cells and liver function test were also performed. The mean value of urinary hippuric acid concentration of the control group was 0.322(±0.267) g/L, while that of the exposed group was 1.260(±0.395) g/L. As the concentration of hippuric acid had statistical proximity in 0.1% level, WBC, GOT, and GPT didn't have any proximity(P>0.05). The exposed group showed lower level of leucocyte counts 6522.40(1710.3) than the control group 6891.50(1483.7). The exposed group showed higher level of GOT(25.75), GPT(27.09) than GOT(23.75), GPT(25.21) of the control group. Dried skin was the highest complained symptom of toluene exposed workers, the second strained eye, the third poor auditory function, and the fourth was headache.
안대명,이창한,최윤찬,조석호,안갑환,김성수 대한상하수도학회 2002 상하수도학회지 Vol.16 No.4
The paper introduces a domestic pump designed for dissolved air flotation (DAF). In the paper, the difference in performance between the domestic DAF pump and conventional pressure saturator is explained using the characteristics of air bubble released. The size distribution of air bubbles released from DAF pump is measured by image analyzer and particle size analyzer. And the mean diameter of bubbles is 43μm. The results are similar to that of pressure saturator. The air volume concentration in the water of domestic DAF pump and pressure saturator are 40 and 70% of theoretical amounts. In DAF system used domestic DAF pump, the removal efficiency of turbidity is 70%.
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.
Removal of Lead by Artherobacter sp .
Ahn, Kab Hwan,Suh, Kuen Hack 한국환경과학회 1998 한국환경과학회지 Vol.7 No.1
The biosorption of heavy metals has received a lot of attraction for application of metal ions treatment. In this work, we studied with Arthrobactor sp., screening from a wastewater containing heavy metals. The Pb uptake capacity of Arthrobactor sp. was nearly 146.9 ㎎ Pb/g dry biomass(initial concentration, 500 ㎎/L), whereas the Pb uptake capacity of Saccharomyces cerevisiae and Saccharomyces uvarum were only around 39.40 and 35.65 ㎎ Pb/g dry biomass, respectively. The Pb and Cr were removed from metal solution much more efficiently than were the other metals(Cd and Cu). The Pb uptake capacity of Arthrobactor sp. increased with increasing in pH(1.8, 3.0 and 4.0) and decreased with increasing of biomass concentration. At pH 4.0, the Pb uptake capacity reached 244 ㎎ Pb/ g dry biomass in Pb initial concentration of 1000 ㎎/L. The Pb uptake capacity of Arthrobactor sp. treated by KOH and CaCl_2 were increased above values obtained with untreated Arthrobactor sp. However, the Pb uptake capacity of Arthrobactor sp. treated by NaOH was decreased. The removal efficiency of Pb was kept above 99% before the breakthrough points were reached.