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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.
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.
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.
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.
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.