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糞尿 및 都市 固形廢棄物에 依한 堆肥化의 實驗報告(Ⅰ)
金秀生 東亞大學校 石堂學術硏究奬勵會 1977 石堂論叢 Vol.2 No.-
In this report has experienced the Possibility and starting condition for composting of night soil and municipal refuse with a view of developing a reusable humus product. Hereby is found as followings; 1. The municipal nightsoil has C/N ratio about 4 and C=0.52GV (significance level 80% in winter season). The municipal nightsoil has to increase his C/N ratio and decrease his humidity for composting. 2. The municpal refuse in Busan has compostable matters about 20% in 1977 and has increased 2% per year as compared With 1972. 3. It is considered the best humidity for starting composting about 35% and warm development about 40-50%.
김수생,손희정,장성호,김철,박현건 동아대학교 환경문제연구소 1994 硏究報告 Vol.17 No.1
1. In biological treatment with AB-Process At A-step : as treatment condition operated HRT about 4hr and F/M ration below 5㎏BOD/㎏MLSS·d obtained removal efficiency of COD, BOD are respectively 30-40%, 15-25%. At B-step : as treatment condition operated HRT about 30hr and F/M ratio below 0.2㎏ BOD/㎏ MLSS·d obtained removal efficiency of COD. BOD are respectively 75-82%, above 91%. On the other hand, statistical overview of correlationship both unstable nondegradable pollutant removal efficiency in B-step and treatment of A-step, it found that excessive removal of BOD in-A-step bring about low loading in B-step caused a bad influence in stabilizing treatment. 2. The defect of AB-process are wanting actual domestic and difficult of A-step management but resistent in loading change, high loading and nonbiodegradable wastewater. And total capacity and electric cost could be reduced respectively about 50%, 40%, when these were campared wit conventional activated sludge system.
HELP Model을 利用한 埋立地에서의 물收支 數値 解析
김수생,김은호,안종수,박출재 동아대학교 환경문제연구소 1994 硏究報告 Vol.17 No.1
The purpose of this study is to estimate leachate generation volume with HELP Model to indentify the applicability of HELP Model in domestic landfills, and to determine factors which effect leachate generation volume using regressing equation. And then the result could be obtained as following ; 1. The correlation coefficients using regression equation among leachate generation volume, runoff and evapotranspiration are 0.843-0.967 and Then of these factors, leachate generation volume is largely effected by precipitation, it will be somewhat effected by otehr factors, too. 2. The coefficients of Determination(γ²) are 0.711-0.935, and 71.1%-93.5% or Y variation in Y = a+b% can explain but 6.5% - 28.9% can't using regression equation.
김수생,최창혁,이현주 동아대학교 환경문제연구소 1991 硏究報告 Vol.14 No.2
The results of study forced on protein reuse of livestock wastewater sludge are as follows : 1. Generally incresing COD and BOD sludge loading, protein content was a tendency to increse. 2. The more SRT increse, the less protein content sludge was a tendency to decrese. 3. For the purpose of improving treatmentment efficiency of livestock wastewater and incresing protein products, it was profitable to treat more two-step aeration process than activated sludge process in treatment efficiency and volume.
金秀生,李根善 동아대학교 환경문제연구소 1991 硏究報告 Vol.14 No.1
The study was been investigated and analyzed over two periods, August and October of 1990 for the purpose of examining Eutrophication of artificial lake. As a result of the study, we proved the correlationship between water quality condition depending on depth and season and concentration of nutrient of chlorophyll-a and we examined trophic state of lake. N/P difference, TSI, phosporus model and got Estimation of Environmental Assimilating capacity by permitted load and subtracted load of T-P. 1. The differences of water temperatures at four points according to the depth of water are : We have got a maximum value, 8℃ at HY-4 in the firstperiod and a minimum one, 3℃ at HY-1 in the sencond in August, the first period stablization was found however it was rarely found on the second period. 2. As a result of Estimation at four different depth of water over two periods, we could discover a vigorus of pH, DO, chlorophyll-a. In the first period the maximum surface concentration chlrophyll-a was 28.5㎎/㎥. 3. N/P difference was from 48.8 to 21.7 the average was 30.2 4. The correlationship between nutrient and chlorophyll-a concentration was r=0.78 5. We estimated applying carlson TSI(Trophic state index) Which shows trophic state of the lake and got TSI(CHI)55, TSI(TP)56 mesotrophic state. 6. We have adopted which were developed considering nutrient as limiting factor and obtained the result as follows : Vollenweider Model case Eutrophic state Larsen and Mercier Model case Eutrophic state Dillon Model case Mesotrophic state 7. Evaluating predictable value and real value of model by T-P. We could have the closest approximate value in the case of kirchner/Dillon model.