UASB에 의한 染料化學工場 廢水處理

김성우,임찬섭,박정호,성낙창,박승조 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.1

This study has been carried out to measuring the biodegradability and toxicity of dyes chemnical factory wastwwater for anaerobic treatment. The experiment consisted of batch test pilot plant test. The results are as follows 1. Biodegradability assays were conducted at two assay concentration for 2gCOD and 5gCOD tat BMP are respectively 0.23㎥CH₄/ ㎏.COD, 0.16㎥CH₄/㎏.COD respresents the noninhibited bioconversion efficency also MRR were 1.080 and 0.959 represented. 2. In pilot plant experiment, COD removal efficency are up 65% represented according to changing COD loading rate from 0.15㎏COD/㎥.d to 2.6㎏COD/㎥.d 3. Alkalinity and Volatile, VA/Alkalinity as chemical factor of anaerobic was 1070∼1700㎎/ℓ, 30∼150g/ℓ and 0.02∼0.09 respectively. 4. According to changing COD loading rate from 0.15㎏COD/㎥.d to 2.6㎏/COD/㎥.d the methane gas production was 0.20~0.23]㎥ CH₄/㎏.COD_(rem)

조류 부산물중 2-MIB의 제거에 관한 기초연구

성낙창,최용락,김은호 東亞大學校附設 農業生命科學硏究所 1999 農業生命資援硏究 Vol.8 No.1

This experiments were performed using O₃, ClO₂and Granular activated carbon in order to remove 2-MIB(2-Methylisobornelo) causig odor in water. In Freundlich equilibrium experiments, 2-MIB was well adsorbed in PAC comparatively and raw water containing TOC was less adsorbed than distilled water by effect of TOC. Jar tests with coconut-based PAC were showed high removal efficiency of 2-MIB in proportion to contact time and concentration of PAC. Oxidation capacity of O₃was demonstrated to be superior to that of ClO₂. Prepared comparatively highly initial concentration as 1991ppt of raw water was treated with post-O₃in condition of 1ppm and 12min. of contact time and then its residual concentration was approximately 569ppt(70% removal efficiency), and the 2-MIB removal efficiencies of the Post-O₃water through coal, coconut shell, wood and zeocarbon based GAC(granular activated carbon) column were 95.8%, 89.5%, 88.4% and 93.7%, respectively. Coal based carbon have most effective adsorption capacity but wood based carbon have a little lower adsorption capacity than others. In GAC column experiment, TOC, UV-254, 2-MIB and so on ewere removed most effectively in case of A(coal) and for this experiment intervals, the change of water quality(UV-254, TOC) was not happened by input of odor substance(2-MIB).

정수처리공정의 침전지에서 부착조류의 특성과 이취발생에 관한 기초연구

성낙창,최용락,김은호 東亞大學校附設 農業生命科學硏究所 1999 農業生命資援硏究 Vol.8 No.1

The purposes of this study were to investigate species of attached algae, and determine these characteristics and relations of odor origin for estimating its source in tap water. Oscillatoria sp. and Mougeotia sp. were colonized at the upper and lower of sedimentation basin in water treatment plant, respectively. In the results that they were analysed to collect colonies of Oscillatoria sp. and Mougeotia sp, they did not detected inodorous Mougeotia sp. but Oscillatoria sp. of some decayed odor did geosmin 3.7ppt and Dimethyl-disulfide with trace. 20species compounds were found in each of sample that were incubated in room temperature for 5days, 4species of these were THMs originated tap water and concentration was 35㎍/ℓ, and 16species compounds were by algac. Especially, sulfur compounds of 10species such as Dimethyl-sulfide were initially not detected but did very much. Also, Indole and Naphthalene were small detected. Considering characteristics of decayed decomposed sampling, generated byproduct for decayed algae of 2species turned out to be nearly identical. If estimating course of odor generation in tap water, chlorine tolerative algae formed big colony to be attached in sedimentation basin and decay was advanced with varying anaerobic condition inside colony's algae. Therfore, a lump of algae detached in suspended state flowed in filter bed, and owing to decayed colony's algae, generated inodororus material could inflowed tap water.

굴껍질을 이용한 고농도 중금속 폐수처리에 미치는 pH의 영향

성낙창,신남철,최장승 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.2

The purpose of this research is to examine the utilization of oyster shells for the removal of high concentrated heavy metals in an acidic·alkali system wastewater. because oyster shells have been known to be very porous, to have high specific surface area and to have alkaline minerals such as calcium and mangnesium. It could be showed that most of heavy metals intended to increase removal rate with pH increase, but maintained equilibrium and heavy metals were removed high. In 7g and 9g, desorptions were caused by the weak physical coherence of heavy metals. Solubilites of heavy metals increased with Fe>Cu>Cr and Fe removal rate was higher than other heavy metals, because removal rate was influenced by- competitive reaction in same pH rather than solubility. In point of Ocean waste recyling, if oyster shells will use wastewater treatment of acidic and high concentrated heavy metals, they could look forward to an expected economical effect.

제지슬러지의 토지주입에 관한 연구

성낙창,김정권,손희정,김은호,김형석 東亞大學校生命資源科學大學附設 農業資原硏究所 1996 農業生命資援硏究 Vol.5 No.1

To examine the agricultural availability of paper sludge, this study investigated the degradation rate of sludge, CO₂ generation out of soil treated with sludge and the degration characteristics of sludge in soil 1. Degradation rate of paper in soil at weeks after treatment was 19.0% at natural temperature and 28.0% at incubation temperature(30℃) 2. The changes of T-C, T-N and C/N ratio of paper sludge in soil at 12 weeks after treatment were 15.5%, 0.22% and 71, respectively, at natural temperature, and 14.5%, 0.24% and 60, respectively at incubation temperature. 3. The changes of pH in soil treated with paper were 6.7∼7.4 at natural temperature and 6.1∼8.0 at incubation temperature. 4. CO₂ generations in soil treated with 1.0%, 3.0% and 5.0% of paper sludge at 12weeks after treatment were 247mg/100g, 334mg/100g and 458mg/100g, respectively, at natural temperature and 385mg/100g, 550mg/100g and 618mg/100g, respectively, at incubation temperature(30℃)

폐기물 성상과 매립방식에 따른 침출수 특성

성낙창,김은호,문추연,김정권,장성호,김수생,박출재 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.1

In this study, we can be obtained the following conclusions about the characteristics of leachate with waste compositions and landfill methods. pH shows a tendency to increase in E. landfill, because NH₃ is created by anaerobic degradation and dissolved in leachate. The concentrations of BOD and COD become different, In case of E. landfill, food of combustible is H. & S. landfill and then SS is high in concentration. According to passed time, T-N is high in concentration, but T-P shows a similar tendency. Heavy metals of leachate is lower than threshold concentrations. If leachate is treated biologically, microbes are not inibitory.

정수처리공정상 염소소독부산물형성에 미치는 오존의 영향

성낙창,박현석,이성식,이용희,이종팔,윤태경 한국환경과학회 2004 한국환경과학회지 Vol.13 No.1

The effect of ozone on the formation and the removal of disinfection byproducts(DBPs) of chlorination process was studied to elucidate the performance of water treatment process. The samples of raw water, prechlorination process, and preozonation process were analyzed quantitatively according to the Standard Methods for the Examination of drinking water. As a result, most of total trihalomethanes(THMs) which were formed in prechlorine treatment process was not removed in the preozonation process. Most of haloacetic acids(HAAs), haloacetonitriles(HANs), and chloral hydrate(CH) was removed in sedimentation and biological activated carbon(BAC) filtration processes. However, DBPs were increased more or less by postchlorine step. In particular, the formation of THMs and HAAs depends on ozone more than chlorine, but, the formation of HANs and CH depends on chlorine more than ozone. The seasonal variation of DBPs concentration for the year needs to be investigated to study the temperature effect because DBPs strongly depend on temperature among various efficient factors.

Ascorbic Acid와 2-Methoxyestradiol에 의한 내분비선 장애물질의 제거효율

성대동,이성식,최금찬,성낙창 동아대학교 환경문제연구소 2000 硏究報告 Vol.23 No.1

The removal efficiency of an environmental endocrine disrupter, 1,l-bis (4-chlorophenyl)-2,2,2-trichloroethane(CPT) has been studied using L-ascorbic acid(ACA) and 2-methoxyestradiol(MSD). l,l-Bis(4-chlorophenyI)-2,2,2-trichlorcethyl anion(CPT^( θ)) is formed by treatment of OH- ion to l,l-bis(4-chlorophenyl)-2,2,2-trichloroethane(CPT), l,l-Bis(4-chlorophenyl)-2,2,2-trichiorcethyl radical(CPT·) yields during the reaction of l,l-his(4-chlorophenyl)-2.2,2-trichloroethyl anion with iodine occurs. A high m v a l efficiency for l,l-bis(4-chlorophenyl-2,2,2-trichlorcethyl radical(CPT·) reveals in the case of L-ascorbic acid(ACA) used more than that of 2-methozyestradiol(MSD). This is in accord with the rate of yielding L-ascorbic acid radical(ACA·) is faster than the one of 2-methoxyestradiol radical(MSD·). The removal efficiency of 1,1-bis(4-chlorophen~l)-2,2,2-trichloroethyl radical(CPT·) is increased with increasing of solvent acidity and solvent hydrogen bonding degree.

甘草成分인 Glycyrrhizin이 Cholesterol Metabolism에 미치는 影響

成樂應,丁海源,洪思岳,金昌煥 대한생화학회 1964 대한생화학회잡지 Vol.1 No.1

우리나라 지방정부의 정보화와 효율성 : Evidence from Korean Local Governments

성낙일,김민창 한국산업조직학회 2003 産業組織硏究 Vol.11 No.4

정보기술(information technology)의 생산성 향상효과는 지난 수십 년에 걸쳐 경제학의 중요 연구대상의 하나니었으며, 최근 신경제(ndw economy)의 부상 및 곧 이은 퇴조와 함께 다시 세계적 관심사로 대두하고 있다. 이와 같은 관점에서 정보화지수가 존재하는 우리나라 지방정부의 통계자료는 매우 유용한 연구자료를 제공한다. 본 연구의 목적은 우리나라 중소도시 지방정부의 기술적 효율성(technical effiency)을 측정하고 지방정부의 정보화지수를 사용해 정보화 수준과 기술적 효율성의 관계를 분석하는데 있다. 이를 위해 먼저 본 연구는 자료포락분석법(data envelopment analysis)을 이용하여 65개 중소도시 행정서비스의 기술적 효율성을 측정한다. 분석기간은 1999년과 2000년이다. 이 효율성 측정결과에 따르면 대도시 주변의 위성도시에 소재한 지방정부들이 비장 소도시에 지방정부에 비해 효율적인 행정서비스를 공급하고 있는 것으로 나타났다. 다음으로 본 연구는 각 지방정부의 기술적 효율성이 다양한 도시특성변수와 지방정부의 정보화 정도에 따라 어떤 영향을 받았는지를 분석하였다. 그 분석결과에 따르면, 도시의 인구밀도가 높거나 인구규모가 클수록 해당 지방정부는 보다 효율적이었다. 또한 지방정부의 정보화 수준, 특히 정보화 설비의 측정정도가 지방정부의 효율성에 긍정적 영향을 미쳤다. 본 연구는 정보기술이 정보기술 생산부문뿐만 아니라 정보기술 활용부문에 대해서도 긍정적 파급효과를 미친다는 사실을 확인하고 있다. This study attempts to estimate difference in technical efficiency among Korean local governments or urban public services and also, to examine the effects of informatisation on the efficiency. Empirical analysis is carried out by applying the DEA(data envelope analysis) to 65 Korean small and medium-sized local governments over the period 1999-2000. One of the principal findings is that large or satellite cities tended to perform better than small cities surrounded with rural areas. Also, the study indicates that population densities and levels had positive effects on the efficiency of Korean local governments. In other words, the production of urban public services may have economies of scale and density. More importantly, the study shows that the efficiency of Korean local governments was positively correlated with their informatisation, especially the amount of IT(information technology) equipment. That is, IT exerted positive spillover effects on Korean urban public services. These empirical findings are relevant to some public policy issues and also, contribute to the IT productivity literature.