http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이찬기,윤주환,권재혁,전태성 한국물환경학회 1990 한국물환경학회지 Vol.6 No.2
An efficient pretreatment of piggery wastewater would be an essential for the successful secondary treatment due to the high concentration of suspended solids(SS) and Biochemical Oxygen Demand (BOD). To evaluate an efficient pretreatment process for the diluted piggery wastewater treatment, the sedimentation process and the filtration process were considered. Results indicated that, the filtration process which adopted dried rice straw as a medium was an effective method to remove the SS and soluble BOD. In addition. the removed rice straw medium would be an adequate bulking agent for the composting process.
회전원판 공법에서의 자산화 공정을 이용한 소규모 오 · 폐수처리
이찬기,류돈식 ( Chan Ki Lee,Don Sik Ryu ) 한국물환경학회 1997 한국물환경학회지 Vol.13 No.3
The objective of this study is to solve the problems related to the effluent quality in RBC process : media clogging and the biomass sloughing. Three stage RBC with Autoxidation phase was operated along with the existing three stage RBC operation by varying the operational parameters in order to compare removal efficiencies of organics and nitrogen. The BOD removal efficiencies in the three stage RBC with Autoxidation phase were over 95% at a organic loading of 98.4g BOD/㎡/day. The existing three stage RBC process showed a 95% removal at a organic loading of 49.2g BOD/㎡/day. Suspended solids removal efficiency was between 61 and 70 percent in the Autoxidation phase at 1st stage RBC by biomass sloughing, and that of the existing RBC was between 45 and 61 percent. Removal of ammonia-nitrogen determined by varying NH₃-N loading rate showed a 85.3∼92.1 percent in the Autoxidation phase and a 67∼76percent for the existing three stage RBC process. NO₃-N level in the effluent increased with decreasing influent loading. In the determination of the kinematic coefficient, area capacity constant(P) in the first stage Autoxidation phase of RBC was 39.9gBOD/㎡·day and half velocity constant(Ks) was 306㎎/L. In the existing three stage RBC, they were 46.6gBOD/㎡·day and 467㎎/L, respectively.
이찬기,박태원,박두선,장민희 한국기상학회 2021 한국기상학회 학술대회 논문집 Vol.2021 No.10
우리나라에 막대한 피해를 일으키는 주요 기상재난 중 하나인 태풍의 내습빈도 변동성을 이해하는 것은 국민 안전 및 방재 측면에서 매우 중요하다. 따라서 기후변동성에 따라 태풍이 한반도에 미치는 영향을 이해할 필요가 있다. 본 연구는 중앙 태평양(CP) 엘니뇨와 라니냐 시기, 동태평양(EP) 엘니뇨와 라니냐 시기에 한반도에 영향을 미친 태풍의 특징을 분석하였다. 한반도에 태풍이 집중적으로 오는 시기인 여름(JA)철에 집중하여 한반도 태풍 내습빈도와 기후변동성 사이의 관계를 파악하고 각 시기별 태풍의 주요 경로와 대기배경장을 분석하였다. 분석 기간은 1980년부터 2020년으로 총 41년을 분석하였으며, 영향태풍은 IBTrACS 자료에서 얻은 태풍의 중심이 한반도 해안선으로부터 300km 이내에 접근한 경우로 정의하였다. 그 결과 EP엘니뇨와 라니냐 시기 모두 평년보다 영향태풍수가 증가했다, CP엘니뇨 시기에는 평년보다 영향태풍수가 증가하고, 라니냐 시기에는 영향태풍수가 감소했다. 태풍의 진로밀도 분석에서 CP엘니뇨 시기에 태풍의 경로가 한반도를 향할 확률이 증가하고, CP라니냐 시기에는 태풍이 한반도를 향할 확률이 감소하는 것으로 나타났다. 이러한 결과는 한반도 영향태풍의 내습빈도와 ENSO와의 연관성을 보다 세분화하여 이해할 필요가 있음을 시사한다.
이찬기,류재근 한국물환경학회 1985 한국물환경학회지 Vol.1 No.1
독성이 큰 크롬과 시안 폐수를 처리하기 위하여 각 조건의 인공폐수를 제조하여 처리실험을 수행한 결과 다음과 같았다. 폐수내의 크롬을 효과적으로 제거하기 위해서는 환원제의 적정투여와 pH조절이 중요하였다. 크롬농도 100㎎/ℓ, 200㎎/ℓ,300㎎/ℓ, 500㎎/ℓ, 1000㎎/ℓ인 시료에 처리실험결과 적정 NaHSO₃량은 시료, 1ℓ당 각각 2㎖, 4㎖, 6㎖, 10㎖, 20㎖ 이었다. pH가 증가함에 따라 NaHSO₃ 투여량도 증가되었으며, pH 1.5일 경우가 pH 1. pH 2 pH3일 경우보다 처리효율이 비교적 좋았다. 총크롬의 제거율이 99.8%∼99.9%일 때 Cr^(6+)의 제거율은 대부분 100%로 나타났다. 시안폐수의 처리실험결과 처리효율은99.8%∼99.9%(잔류 CN^- 농도 0.03㎎/ℓ이하)의 범위 이었으며, pH 11일 경우의 pH 9일 경우보다 우수하였다. In recent year there has been considerable concern about waste discharges of chromium and cyanides to aquatic ecosystems. Chromium occurs in aqueous systems as both Cr (III) and Cr (VI). the Cr (VI) is of particular concern because this form has been demonstrated to be a public health hazard. The toxicity of cyanides to fish has long been recognized. Compounds containing the cyanides radical are frequently present in effluents of many industries, including electroplating plants, steel mills, petroleum refineries and gas works. The objective of this study is to remove the chromium and cyanides in the wastewater efficiently. In the experiment the amount of NaHSO₃ used for treatment were 2,4,6,10 and 20 ㎖ and the concentration of chromium was 100, 200, 300, 500 and 1000 ㎎/ℓwastewater. At that time efficiency was 99.1%-99.9% and the efficiency of pH 1.5 was better than pH 1, pH 2 and pH 3. The results of cyanides treatment was that concentration of residual CN^- ion was below 0.003 ㎎/ℓ, treated efficiency was 99.9%-99.98%, and in case of pH 9 was better than pH 11.
이찬기,윤주환,권재혁 江原大學校 附設 環境硏究所 1991 環境硏究 Vol.8 No.-
Tricking filter was not usually employed for the piggey wastewater treatment resulting from a high concentration of susfended solids(SS) and biochemical oxygen demand(BOD) in the piggery wastewater could hamper and efficient operation due to the frequent clogging problems. In order to minimize the clogging problem, the filtration process using strawcolumn was applied, as a pretreatment process, for SS redution. The prefiltered effluent was then treated in the laboratory tricking filters which used crused stone media. The experimental results showed that the overall removal efficiencies of BOD, chemical oxygen demend, and SS were 78, 75, and 90%, repectively, at the respective tricking filter gydraulic and organic loadings of 1.26㎡/㎡/day and 0.77kgBOD/㎡/day. The tricking filter constant, and reaction rate constant, k of the Eckenfelder equation were 0.6901 and 0.89, respectively, obtained from the experimental data.