돈사폐수(豚舍廢水)의 효율적인 전처리 공정

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.

슬러지의 호기성(好氣性) 퇴비화(堆肥化)

이찬기,김영래,Lee, Chan Ki,Kim, Young Rai 대한토목학회 1987 대한토목학회논문집 Vol.7 No.3

본(本) 연구(硏究)는 배뇨(排尿)슬러지를 퇴비화(堆肥化)시켜 유기물(有機物)의 감소(減少), 부식비도(腐蝕比度)와 퇴비화기간(堆肥化期間)을 알아보는데 그 목적(目的)이 있으며 실험실(實驗室) 반응조(反應槽)가 이용(利用)되었다. 실험(實驗)에 사용(使用)된 시료(試料)는 기뇨처리장(冀尿處理場) 슬러지로서 함수비(含水比)를 단계적(段階的)으로 변화(變化)시켜 퇴비화정도(堆肥化程度)를 알아보았다. 함수비(含水比)가 60%에서 퇴비화기간(堆肥化期間)이 약 10일(日)로 나타났고 COD는 37mg/l/day(lgr 건조 중량중)감소(減少)하였으며, C/N는 약 11~13, 부식비도(腐蝕比度)는 175정도(程度)로 나타났다. The purpose of this study was to know reduction of organic matter, degree of humification and composting period by corp. posting of night soil sludge. Laboratory reactor was used for this study. Samples being used in this experimentation was sludge of night soil treatment plant. The degree of composting was investigated by changing moisture content. The laboratory study indicated that the degree of humification was about 175, C/N ratio was about 11~13, composting period was about 10 days and COD reduction was 37mg/l/day in case of 60% moisture content.

嫌氣性 Filter Media 反應槽에 의한 廢水處理

李燦基,林哉明 江原大學校 産業科學硏究所 1982 産業技術硏究 Vol.2 No.-

This study mainly concentrated on the treatment of nightsoil by an anaerobic filter media process. Nightsoil has been one of the major water pollutants in this couotry. It represents high BOD and SS concentrations. A comprehensive laboratory study conducted at Kangweon National University indicate : (1) In the case of anaerobic filter system, COD and BOD removal efficiencies were greatly influenced by hydraulic retention time(HRT), but SS removal efficiencies dropped slowly when HRT were 2~15 days. (2) COD removal efficiencies were 19% when HRT were 15 days, 14% when HRT were 8 days, 10% when HRT were 6 days, 9% when HRT were 4 days, 2% when HRT were 2 days. (3) BOD removal efficiencies were 23% when HRT were 15 days, 14% when HRT were 8 days, 18% when HRT were 6 days, 7% when HRT were 4 days, 5.8% when HRT were 2 days. (4) SS removal efficiencies were 21% ~ 25%(2~15 days HRT)

연구발표논문초록 : 고정층 혐기성 (嫌氣性) 활성 슬럿지를 이용한 분뇨 처리에 관한 연구

이찬기,최의소 한국화학공학회 1975 추계총회초록집 Vol.- No.-

유동층/회분식 반응기 복합반응공정에서 폐폴리스티렌의 처리

이찬기,강석환,김준식,최명재,강용 한국폐기물자원순환학회 2006 한국폐기물자원순환학회지 Vol.23 No.6

회전원판 공법에서의 자산화 공정을 이용한 소규모 오·폐수처리

이찬기,류돈식 江原大學校 附設 環境硏究所 1998 環境硏究 Vol.15 No.-

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 NH_(3)-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. NO_(3)-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 306mg/L. In the existing three stage RBC, they were 46.6gBOD/㎡·day and 467mg/L. respectively.

有害重金屬 産業廢水處理의 技術開發에 關한 硏究

李燦基,柳在恨 江原大學校 附設 環境硏究所 1990 環境硏究 Vol.7 No.-

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 freguently 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 NaHSO₃used for treatment were 2,4,6,10 and 20 ml and the concen-tration of chromium was 100,200,300,500 and 1000 ㎎/1 wastewater. At that time efficiency was 99.1%-99.9% and the dfficiency of pH 1.5was 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㎎/1, treated efficiency was 99.9%-99.98%, and in case of pH 9 was better than pH 11.

環境管理를 위한 會計的 意思決定方法에 대한 理論的 評價

이찬기 천안대학교 2001 천안외국어대학논문집 Vol.- No.1

In the last 30 years, a number of new approaches for use in environmental management have been developed for used by decision-makers. This paper presents a framework for comparing these approaches based on various meth-odological feature. These include : nature of the approach, type of decision-maker, overall purpose and object analysed, perspective, investigated dimen-sions, character of the approach, basis for comparison, system boundaries, type of data, and evaluation of results. Use of the framework is illustrated for four approaches : industrial ecology, design for environment, environmental impact assessment and environmental accounting. This paper suggests that there is considerable scope for exploring these relationships between and within app-roaches. Rather than developing new tools for environmental management, it may now be appropriate to focus on practical integration of existing approa-ches for different applications.

재무제표 정보를 이용한 비정상 수익률의 예측

이찬기,고동원 천안대학교 2002 천안외국어대학논문집 Vol.- No.2

This paper predicts to abnormal return by using accounting information in the Korean Stock Market. The use of forecasting model of relevant accounting information system if helpful to change the investment method used the financial statement, core of accounting information. For this purpose, the univariate, correlation, and the regression analysis were performed using approach. The empirical results show that the R&D and IMF(dummy) variable exhibited abnormal returns. The research shows that we can get excess stock returns over the average market rate of returns when follow investment decision by R&D and IMF(dummy) variable.

슬러지의 好集性 增肥化

李燦基,金榮來 江原大學校 附設 環境硏究所 1990 環境硏究 Vol.7 No.-

本 硏究는 冀尿슬러지를 推肥化시켜 有機物의 減少, 腐?比度와 推肥化期間을 알아보는데 그 目的이 있으며 實驗室 反應?가 利用되었다. 實驗에 使用된 試料는 冀尿處理場 슬러지로서 含水比를 段階的으로 變化시켜 推肥化程度를 알아보았다. 含水比가 60%에서 推肥化期間이 약 10日로 나타났고 COD는 37mg/1/day (1gr건조중량증)減少하였으며, C/N 는 약 11~13, 腐?比度는 175 程度로 나타났다. The purpose of this study was to know reduction of organic matter, degree of humifica-tion and composting period by composting of night soil sludge. Laboratory reactor was used for this study. Samples being used in this experimentation was sludge of night soil treatment plant. The degree of composting was investigated by changing moisture content. The laboratory study indicated that the degree of humification was about 175, C/N ratio was about 11~13, composting period was about 10 days and COD reduction was 37mg/1/day in case of 60% moisture content.