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박흥석,이상윤 대한상하수도학회 2003 상하수도학회지 Vol.17 No.2
Feasibility of kaolin addition methods to improve the removal efficiency of dissolved organic matters in coagulation process of water treatment plant was studied. The removal mechanisms of organic and turbidity and characteristics of adsorption of soluble organic matters to kaolin particles were studied by synthetic water containing humic acid. In addition, the effect of kaolin addition on the removal of turbidity and humic acid in coagulation process were experimentally investigated by synthetic and actual raw water. The removal of humic acid was considered to be removed by phase transfer of humic acid from liquid to kaolin particles. The relationship of adsorbent and adsorbate can be described by Freundlich isotherm equation. The removal efficiency of humic acid by kaolin addition using synthetic water, was 50% higher in DOC, 82% in UV-254 absorbance and 40% in turbidity than those of control. The removal efficiency of humic acid without kaolin additions using actual raw water, was 10% of DOC, 47% of UV-254 absorbance and 74% of turbidity, while those with kaolin additions were 27% of DOC, 66% of UV-254 absorbance and 89% of turbidity. The results of this study show that conventional turbidity addition method to improve coagulation in low turbidity water can be applied to enhanced removal of soluble organic matters in coagulation process.
박흥석,조영국 울산대학교 1997 공학연구논문집 Vol.28 No.1
본 연구의 목적은 1차 처리를 하는 울산하수처리장을 화학적 응집제의 첨가로 수질을 개선하는 것이었다. 설계당시의 BOD, COD 및 SS의 제거효율은 40 ∼ 60%이었으나 현재의 제거효율은 30∼40% 이다. 그러나 설계당시 고려되지 않았던 총질소와 총인의 제거율은 각각 30%, 3%이었다. 소량의 응집제 Hi-PAX(Poly Aluminum Chloride Silicate)를 펌프동 유입부에 주입하여 모든 항목에서 오염물의 제거율이 향상되었다. 또한 총질소의 제거효율은 3%에서 30%로 총인의 제거효율은 30%에서 90%로 증가하였다. 종합적인 오염인자인 OCP(Oxygen Consumption Potential)는 기존 1차 침전공정은 전체 오염물의 15%정도만 제거할 수 있으며 생물학적 처리는 39%, 그리고 화학적 처리는 50%내외로 처리되는 것으로 나타났다. OCP 1kg 를 처리하는데 소요되는 단위처리비용은 기존 1차 처리 공정의 33%, 1차처리후 생물학적 처리할 경우의 75% 수준이었다. The objective of this study was to upgrade the efficiencies of Ulsan primary municipal wastewater treatment plant by chemical application. The present removal efficiencies of BOD, COD and SS were in the range of 30 ∼ 40% while the design target were 40∼60%. But the removal of total nitrogen and phosphorous, which components were not considered at the time of design, were 30 % and 3 %, respectively. The simple application of small amount of Hi-PaX(Poly Aluminum Chloride Silicate) to the inlet of screw pump shows enhanced removal efficiencies in all contaminants. The removal of SS increased to 80 ∼ 90% while BOD and COD to 70% and 55%, respectively. In addition, the removal of total nitrogen and phosphorous removal also increased from 3% and 25% to 30% and 90%, respectively. The removal of integrated pollution parameter OCP(Oxygen Consumption Potential) in present primary treatment was 15%, 39% in biological treatment after primary treatment and about 50% in chemical treatment. the unit cost of OCP removal in chemical treatment was 33% of that of present primary process, 75% of that of biological treatment after present process.
박흥석,이상윤 울산대학교 1996 공학연구논문집 Vol.27 No.2
본 연구에서는 울산시 소각시설의 설계에 필요한 기초자료를 도출하기 위하여 처리대상이 되는 생활계 폐기물의 발생량, 물리적 및 화학적 특성을 조사하였다. 연구기간동안 매립장으로 1 일 평균 반입량은 629.5톤으로 수거인구 752,864명을 고려하면 배출원단위는 0.84kg/인ㆍ일 이었다. 울산시의 매립지로 운반되는 폐기물의 적재밀도는 일반차가 평군 217.8 kg/m³이었으며 압축차가 평균 382.1 kg/m³이었다. 울산시의 인반폐기물의 성상은 유기성 64.5%, 무기성 35.5% 이었으며 가연분의 삼성분은 수분 48.3%, 가연분 44.9%, 회분 6.8%이었고 총폐기물에 대한 저위발열량은 1496-1949kcal/kg으로 평균 1731 kcal/kg이었다. The quantity and the characteristic of municipal solid wastes (MSWs) generate in Ulsna were investigated to collect the basic design data for solid waste incineration facilities by conventional composite sampling method at landfills. The average daily quantity of MSWs transported to the landfills was 629.5 ton and the population of Ulsan was 752.864. Thus the unit generation rate of MSWs was estimated to be about 0.84 kg/capㆍday. The specific loading weight of MSWs transported by general truck was 217.8 kg/m³while that of compact truck was 382.1 kg/m³. The organic and inorganic portion of collected MSWs were 64.5 and 35.5% respectively. The composition of combustible municipal solid waste was moisture 48.3%, combustible 44.9% and residual 6.8%. The low heating value of solid waste as discarded was in th range of 1496-1949 kcal/kg and average was 1731 kcal/kg.