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간혈적 흐름 상태하에서 활성슬럿시 반송율에 의한 폭기조의 최적설계에 관한 연구
육운수 忠州大學校 1980 한국교통대학교 논문집 Vol.13 No.3
The aeration tank is one of the most important facilities for the treatment of wastewaters by an activated sludge process. In this paper the effects of the sludge volume index and the volumetric recycle ratio of activated sludge on the volume of aecation tank are discussed. In general, according to the results of the research, the sludge volume index of activated sludge decreases and the settleability of the sludge is improved as the solids retention time is increased. The volume of an aeration tank can be reduced by increasing the volume of return sludge and the mlss concentration in the areation tank. However, within the limits of technical and process feasibility the final choic of the design volume of an aeration tank would be based on an economic analysis of the factors determining the cost associated with a given volume such as reactor capital cost recycle pumping costs, and areation or mixing costs.
水理幾何學的 因子에 의한 河川의 自淨能力 推定에 관한 硏究
陸雲洙 관동대학교 1987 關大論文集 Vol.15 No.2
A literature review and experience research was carried out to estimate the Self-Furification constant of Kum River which flows through Dae-Jeon and the pollution middle State of which is concerned with by many people. According to the research it seems that deoxygenation constants estimated to be 0.61-0.260 based on water depth are more acceptable than those based on flow rate. and that not all of the formula propsed for computation of reoxygenation constant are adequate for Kum River.