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Computer Simulation 에 의한 매립지(埋立地)의 침출수해석(沈出水解析)
이정전,이우범,Lee, Jung Jun,Lee, Woo Bum 대한토목학회 1987 대한토목학회논문집 Vol.7 No.4
본(本) 연구(硏究)는 실제(實際) 매립지(埋立地)의 현장조사와 Lab-Lysimeter의 측정(測定)을 실시하여 침출수(浸出水)의 발생량(發生量)과 수질(水質)을 예측하기 위하여 수행되었다. 매립시간(埋立時間)의 경과에 따른 폐기물중(廢棄物中) 휘발성(揮發性) 고형물질(固形物質)(VS)의 함량(含量), 생분해가능물질(生分解可能物質)(biodegradable matter, BDM), 함수율(含水率)(moisture content), 수분저장능력(水分貯藏能力)(field capacity), 건조단위중량(乾燥單位重量)(dry density) 등(等)을 측정분석(測定分析)하여 매립지내(埋立地內)의 폐기물(廢棄物)의 성상(性狀) 및 분해(分解)정도를 파악하고, 매립지(埋立地)의 성상(城上)과 비슷한 Lab-Lysimeter를 제작하여 생폐기물(生廢棄物) 및 분해(分解)가 진행(進行)된 폐기물(廢棄物)을 투입하여 침출수(浸出水)의 발생량(發生量) 및 수질(水質)을 측정분석(測定分析)하였다. 또한 불포화(不飽和)흐름방정식(方程式)에 증발산량(蒸發散量)과 표면유출(表面流出)을 고려한 모델을 만들고, 분해요소(分解要素)를 적용하여 불포화분해이송식(不飽和分解移送式)으로 발전(發展)시켰으며, 유한차분법(有限差分法)(finite difference method)을 이용(利用)하여 computer program을 개발(開發)하였고 폐기물(廢棄物) 매립지(埋立地)에서 지수문학적(地水文學的) 요소(要素)와 폐기물(廢棄物)의 분해요소등(分解要素等)을 고려하여 simulation을 실시하였으며 실험결과(實驗結果)와 비교(比較) 검토(檢討)한 결과(結果), 본(本) 연구(硏究) 모델이 침출수(浸出水)의 발생량(發生量)과 수질(水質)을 예측하는데 적합하다고 판단되었다. The present study was conducted to measure and predict the leachate generation and to establish the methods of leachate control and handling by both field and lab-lysimeter studies. The change of biodegradable matter, field capacity, dry density, quantity and quality of leachate as a function of time of landilling were measured. The model based on the theory of unsaturated flow and contaminant transport in porous media was developed and simulation model was used for the prediction of movement of landfill moisture and for the strength in leachate in terms of organic and inorganic contaminant. The model constructed from the present study in terms of unsaturated decomposition and transport combined with the evapotranspiration and surface runoff showed good agreement with the results obtained by lysimeter studies.
도시(都市) 폐기물(廢棄物)로부터 Biogas 생산(生産)에 관한 기초적(基礎的) 연구(?究)
최의소,이정전,Choi, Eui So,Lee, Jung Jun 대한토목학회 1987 대한토목학회논문집 Vol.7 No.4
본(本) 연구(硏究)에서는 한국(韓國)의 도시(都市)에서 배출(排出)되어 매립(埋立)되는 고형폐기물중(固形廢棄物中) 약 40%를 차지하고 있는 유기성물질(有機性物質)로부터 biogas 생산(生産)에 대한 기초자료(基礎資料)를 얻기 위하여 광주시(光州市) 근교에 있는 매립장(埋立場)의 시료(試料)로서 1976년(年)부터 1985년(年)까지 연도별(年度別)로 함수율(含水率) 유기성물질함유율(有機性物質含有率)(VS)의 변화(變化)와 sacoharide계(系)와 lignin의 함량(含量) 변화(變化)를 측정(測定)하여 매립기간(埋立期間)의 경과에 따른 유기성물질(有機性物質)(VS)의 변화식(變化式)을 제안(提案)하였으며 sacoharide계(系)/lignin(S/L)로부터 매립(埋立)경과년수를 산정(算定)하는 방법(方法)을 수학적(數學的)으로 나타내었으며 S/L과 VS의 상관성(相關性)도 아울러 구하였다. 아울러 폐기물(廢棄物)의 종류별(種類別)로 분류(分類)한 시료(試料)와 혼합시료(混合試料)에 대한 가스 발생속도계수(發生速度係數)(k)를 구하여 도시폐기물(都市廢棄物)로부터 가스발생량(發生量)을 추정하는 수학적(數學的) 모형을 결정하였다. To evaluate the fundamental factors in the recovery of biogas from the landfills composed of about 40% of volatile solids, the experiments for the samples from the operating landfill site as well as from the laboratory-scale lysimeter were undertaken. In the test of landfills, the change of moisture content, the content of volatile solids (VS), the ratio of saccharide to ligin(Y) and the estimation of landfills reclaimed and the correlationship between VS and Y were investigated. During the experiments with laboratory-lysimeter, temperature, pH, gas production rate, the composition of gas were measured. The mathematical model derived from the the rate coefficient of gas production(k) were proposed from the results of this investigation. Furthermore, the proposed mathematical model from this study was verified with the obtained values from experiments.
동복호에서의 이취미물질 생성 조류에 관한 연구 - 자연수역 및 배양을 통한 이취미물질 확인
배석진,조영관,이정전,이진종 ( Seok Jin Bae,Young Gwan Cho,Jung Jun Lee,Jin Jong Lee ) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.2
In order to research the odor and taste substances naturally produced by algae in the surface water of the Dongbok reservoir, we studied relationship between algal biomass and taste and odors substances in culture fluids, which were analyzed by GC/MS. Alga producing musty or earthy odors in culture media was Anabeana macrospora, Oscillatora tenuis and Phormidium tenue. The slime-producing algae were Microcystis aeruginosa, and the algae causing fishy odor was Eudorina elegans. Odor of cucumber was detected in the culture media of Peridinium, and grassy odor was detected in Synedra acus. The musty odor substance, Geosmin(171ng/L), was mainly produced by Anabaena macrospora in the Dongbok reservoir at May, 1995 when the abundance was very large, 373,740cells/L(23,400 colonies). The products of Geosmin each their colony were 0.007ng/colony. In the culture fluids, Anabaena macrospora and Oscillatoria animals produced geosmin, and Oscillatoria tenuis and Phormidium tenue produced 2-MIB. When chlorinated in culture fluids of algae, about 80% of total amount of odor and taste substances was increased. It may be caused by the release of taste and odor substances inside algae body.
조영관,배석진,백순기,이정전 ( Young Gwan Cho,Seok Jin Bae,Soon Ki Baik,Jung Jun Lee ) 한국물환경학회 1996 한국물환경학회지 Vol.12 No.3
When wild growing plants such as Alopecurus aegualu var. amurensis were submerged in water for experiment, the conductivity and color of the water increased to a maximum 67 times that of raw water on the edged of Dongbok reservoir. In case of withered matters of Setaria viridis, the variation of color vas small, but when withered matters of Persicaria lapathafolia - which is used for dye materials - were submerged, the increasing rate of water color was very high. The variation of concentration of phosphorus and nitrogen in growing plants such as A. aegualis var, amurensis was 4∼37times and 2.5∼10times higher than that of withered plants(S. viridis and P. lapathafolia). As for treatment method. when ashes of A. aegualis var. amurensis were submerged in water, the concentration of total nitrogen(TN) and total phosphorus(TP) decreased more than that of non-treated. On the contrary, in case of withered matter of Persicaris lapathafolia, when ashes were submerged in water, the concentration of TN and TP increased more than that of the nontreated. Total nitrogen amount from the total plant biomass in the Dongbok reservoir was 12,821㎏ and total phosphorus amount was 1,141㎏. From among them, the amount of TN and TP in Persicaria lapathafolia was larger than that of any other dominant species.
전분과 Acrylamide 를 이용한 새로운 응집제 합성과 응용
박금숙,김인호,김명호,김영희,이정전 ( Piao Jin Shu,In S . Kim,Myung Ho Kim,Young Hee Kim,Jung Jun Lee ) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.1
In this research, new coagulant was synthesized by copolymer reaction using starch and acrylamide. The compositions of testing materials were SCSA30(starch 30%, acrylamide 70%), SCSA40(starch 40%, acrylamide 60%) and SCSA60(starch 60%, acrylamide 40%). Then, coagulation tests under proper pH condition were conducted for sample obtained from a mixing control tank of nightsoil treatment plant in Na-ju City. Concentrations of coagulant prepared for the tests were w_t. 2%, w_t. 4% and w_t. 6%. Optimum dosages were determined sludge. 1. It is concluded that pH 7.0 was optimum condition for the test using w_t. 2% of SCSA30. 2. The best coagulation reaction in terms of suspended solid concentration showing 32㎎/L was obtained when w_t. 4% of SCSA30 was used. 3. In terms of effluent concentrations for the BOD_5, COD_(Cr), TKN and water content w-1. 4% of SCSA30 consistently showed the highest removal efficiency. However, w_t. 2% of SCSA40 was shown to be the best for the treatment of Total Phosphorus. 4. For the test of dehydration ability, the lowest value of specific resistance was obtained where w_t. 4% of SCSA30 was applied. Optimun dosage was turned out to be 50㎖ of coagulant per 1ℓ of sample.