상수도 정수장 오이중 Alum회수 및 재활용에 관한 연구

김관천,노기환,강영식,이치영,류일광 대한환경위생공학회 1995 대한환경위생공학회지 Vol.10 No.1

Alum recovery has recently gained more attention because many water utilities need to improve their sludge handling and disposal practices. As part of an overall sludge management program recovery can reduce the amount of solids and allow for reuse of the recovered Alum as a coagulant. This study was examined the effectiveness of Alum recovery from the Sludge at the D water treatment plant in Kwangju city. The results were summarized as follows 1. Alum recovery was obtained sufficiently acidification(An optimum condition was pH2-3) With $H_{2}SO_{4}$ to settled sludge. In this case recovered liquid Alum from sludge of 2.1% solids concentration at pH 2.1 was contains Aluminum $1,602mg/{\ell}$(as $Al_{2}O_{3}$ 0.3% ) and other metal of low level. 2. It was an optimum condition to all reuse of recovered Alum as a coagulant that rate of Commercial Alum:Recovered Alum=$14{\mu}{\ell}/{\ell}{\;}:{\;}200{\mu}{\ell}/{\ell}$ In a result of Jar Tests. 3. It was a result of Alum recovery from sludge, the reduction effect of amount of solids was about 57.4%. 4. If all recovered Alum were reused the reduction effect of solid wastes disposal cost and chemical drug's cost was about 22%.

오미자를 이용한 Hg(I), Pb(II), U(VI) 이온들의 흡착

김관천,김준태,Kim, Kwan-Chun,Kim, Joon-Tae 대한환경위생공학회 2007 대한환경위생공학회지 Vol.22 No.1

This study was examined adsorption ability of heavy metal Hg(I), Pb(II), and U(Vl) ion use of fruit from schizandra chinensis, The fruits of schizandra chinensis sample used breaking into fragments $50{\sim}100$ mesh. The sample solution was mixed fruits of schizandra chinensis and heavy metal ion. Each heavy metal ion of into solution was quantum analysis with ICP-AES. As the result, each condition of maxium adsorption ability of heavy metal ion was high in the range of pH 5-7, adsorption time was about 15 minutes, and the optimum temperature was $100^{\circ}C$. The heavy metal ion was increased adsorption in order of increasing concentration and in ethanol solution better than in aqueous solution.

光州地域의 土壤微生物과 物理化學的 特性에 關한 硏究

金寬天,金商文 광주보건대학 1991 論文集 Vol.16 No.-

With the soil samples collected from 33 locations in Kwangju area, the physiochemical properties of soil and soil microorganisms have been studied and the results of the analysis were as follows : 1. The temperature, pH, moisture and organic matter of sampling sites were measured in the range of 21.0~28.0°℃, 4.0~6.6, 2.1~24.0% and 2.8~ 22.0%, respectively, and average was 24.5°℃ of temperature, 4.9of pH, 11.9% of moisture and 8.9% of organic matter. 2. The general bacterial number, celluolytic bacterial number, general fungal number and celluloytic fungal number were measured in the range of 23×10(5)~1548×10(4), 8.0×10(5)~412.0×10(5), 0.3×10(4)~56.4×10(4) of general bacteria, 102.5×10(5) of cellulolytic bacteria, 13.0×10(4) of general fungi and 4.3×10(4) of cellulolytic fungi.

Cellulose 분해효소를 분비하는 Trichoderma 속의 섬유소분리 및 특성에 관한 연구

김관천 광주보건대학 2001 論文集 Vol.26 No.-

Isolation and characterization of Trichoderma SP. Producing cellulases. Based on taxamomaricc studies, the fungus could be classified as a strain of Trichoderma SP. Trichoderma is known source of an extracellular cellulase. The culture was grown at 28℃ for 3 days before storing at 4℃. Induction medium according to the mineral component of minimal medium. Growth inhibitor is L-sorbose, oxgall, Sodium deoxy-cholate and triton X-100. This results suggest that triton X-100 is more then the growth inhibitor of Trichoderma SP. It is the more efficient in oxgall.

住岩댐 水系의 大脹菌群 分布 및 密度에 관한 硏究

김관천 광주보건대학 1991 論文集 Vol.16 No.-

The Population densities of fecal E. coli in Posong river, Tongbokck'on and Isack'on where was planed for Juam Dam were estimated during the periods from summer 1988 to summer 1990. The results showed that total density of fecal E. coli was 15.9×10(3) cells/100ml in January 1989, 5.9×10(3) cells/100ml in April, 1989 11.8×10(3) cells/ 100ml, in November 1989, 6.3×10(3) cells/100ml January, 1990. The increase of population density was effected by process of contaminas. Consequently the increase of population density for E. coli was mainly influenced by flow of organic material from domestic sewage particlary and animal organic matters were usually more effective than plant organic matters in Juam Dam.

상수도 정수장 오니중 Alum 회수 및 재활용에 관한 연구 ( A Study on Alum recovery and reuse from the sludge in water treatment plant )

김관천,노기환,강영식,이치영,유일광 대한환경위생공학회 1995 대한환경위생공학회지 Vol.10 No.1

전사수준에서 탄소원에 따른 효모 glucoamylase의 발현

김관천,진종언 광주보건대학 1996 論文集 Vol.21 No.-

Northern hybridization of putativa gene fragments of glucoamylase from Lipomyces kononenchoae or Candida tsukubaensis glucoamylase with poly(A^(+))RNA extracted from its cells grown in several carbon sources was carried out. The synthesis of L. kononenchoae glucoamyase was several repressed by glucose while that of C. tsukubaensis glucoamylase was better in glucose than in starch. This result was consistent with that of enzyme activity.

NADPH의 산화반응과 아질산 생성반응에 의한 Metallothionein의 항산화적 기능 확인

김관천(Kwan-Chun Kim),김준태(Joon-Tae Kim),김희정(Hee-Joung Kim) 대한환경위생공학회 2006 대한환경위생공학회지 Vol.21 No.1

Metallothioneins(MTs) belong to the class of low molecular weight proteins. Recently, it has been suggested that MTs may play a direct role in cellular defense against oxidative stress by functioning as antioxidants. Oxidative damage to different cellular components makes a major contribution to many pathogenenesses. Several studies have demonstrated that MT is able to quench a wide range of reactive oxygen species at a higher efficiency than other well known antioxidants such as superoxide dismutate(SOD). The present study was designed to evaluate the effect of MT on the activities of the reactive oxygen species removal system. MT showed the scavenging of superoxide in the SOD assay system in the presence or absence of SOD. When MT was added to nicotinamide adenine dinucleotide phosphate(NADPH) oxidation system in presence of fixed amount of SOD increase the breakdown rate of superoxide. When MT was added to the system that form nitrite from hydroxylammonium chloride, the formation of nitrite was inhibit. We concluded that the function of MT as antioxidant might have an effect on the level of superoxide scavenging.

섬진강 하구역에서 환경요인 및 기초생산성의 변화

양성렬,송환석,김관천,박철,문창호,YANG SUNG RYULL,SONG HWAN SEOK,KIM KWAN-CHUN,PARK CHUL,MOON CHANGHO 한국해양학회 2005 바다 Vol.10 No.3

섬진강 하구역에서 일차생산을 조절하는 환경요인과 기작을 포악하기 위하여 엽록소 a, 영양염, pH, 부유물질, 용존산소, 염분과 일차생산을 2001년 2월, 4월, 8월, 10월 네 차례에 걸쳐서 측정하였다. 조사기간 중 일차생산의 범위는 50.7에서 14,203.3 mg C $m^{-3} day^{-1}$의 범위를 보여주었다. 다른 하구역과는 대조적으로 본 조사지역에서는 대부분의 시기에 높은 수층 투명도로 인하여 광 조건이 광합성의 제한요인으로 작용하지 않았다. 염분이 10에서 20 psu사이의 지역에서 가을철 대증식이 발생하였는데, 이 현상은 매년 나타나는 것으로 보이며 그 기작에 대하여 추가적인 연구가 필요한 것으로 생각된다 일차생산을 조절하는 주된 요인 중의 하나인 영양염의 거동은 염분에 의하여 지배되는 것으로 보인다. 질소계 영양염의 주된 공급원은 섬진강으로부터의 담수에 의한 것으로 보이는 반면, 인은 광양만 유역의 산업폐수로부터 기인한 것으로 판단된다. 본 조사지역에서 식물플랑크톤에 의한 일차생산은 시간적 공간적인 변화를 보이며, 수층의 투명도와 밀접한 관계를 나타내고, 인접한 광양만 내의 연안역에 비교하여 상대적으로 높은 값을 나타내었다. To investigate the aquatic environmental factors and processes controlling primary production in the Seomjin River estuary, chlorophyll a, nutrients, pH, SS, DO, temperature, salinity and primary productivity were measured in February, April, August and October, 2001. Primary productivity values ranged between 50.7 and 14,120.3 mg C $m^{-3} day^{-1}$ during the sampling period. In contrast to other estuaries, light condition did not seem to be the important limiting factor far primary production due to high water-column transparency during most of the time. The autumn bloom occurred in regions where salinity values ranged between 10 and 20 psu. This phenomenon appeared to develop every year and deserves further investigation. The behavior of nutrients, which is one of the major factors controlling the primary productivity, appeared to be governed by salinity regimes. The main source of nitrogenous nutrients seemed to be the freshwater runoff from the Seomjin River. However, that of phosphorus seemed to be from the industrial wastewater in Gwangyang area. The primary pro-duction of phytoplankton in the study area varied with space and time, showing a close correlation with water column transparency, and exhibited higher values compared to those of adjacent coastal regions in Gwangyang Bay.

정향(Clove) 추출물이 티로시나아제 유전자의 발현에 미치는 효과

진종언,이정용,김관천,Chin, Jong-Eon,Lee, Jeong-Yong,Kim, Kwan-Chun 대한환경위생공학회 2007 대한환경위생공학회지 Vol.22 No.1

Clove extract by methanol increased expression of the tyrosinase gene on B16 mouse melanoma cells containing tyrosinase promoter. $10{\mu}g/mL$ and $100{\mu}g/mL$ of the extract showed expression rate of the tyrosinase gene about 138% and 245%, respectively, compared with control. At $500{\mu}g/mL$, expression rate of the extract was impossible to measurement by high cytotoxicity. The solvent fraction of methylene chloride also exhibited highly expression rate as methanol extract. However, the solvent fractions of butyl alcohol and water showed repressive effect on expression of tyrosinase gene at $500{\mu}g/mL$. In MTT assay, cell survival rate of the extract exhibited similar to expression rate of tyrosinase gene. That is, $10{\mu}g/mL$ and $100{\mu}g/mL$ of the extract showed the cell survival rate about 128% and 187%, respectively.