Measurement Of The Compactness Of Floc Through Fractal Dimension

• Main Author: 劉彥甫
• Other Authors: 徐治平
• Format: Others
• Language: zh-TW
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/38051047918605259978

碩士 === 國立臺灣大學 === 化學工程學研究所 === 81 === 　　The structure of floc plays a significant role in solid liquid separation. In the present study, the compactness of floc is measured through its fractal dimension. This parameter is obtained by correlating the apparent floc density and its linear size. 　　Factors affecting the structure of floc are ample. Here, six operating variables are chosen, and their effects on the fractal dimension of floc are examined. The results obtanied can be summarized as follows. (1) Floc formed at pH 8 to 9 has the most compact structure. (2) The compactness of floc decreas with the degree of hydrolysis of polymer. (3) There exists an optimal molecular weight for polymer. (4) The compactness of floc increases with the concentration of colloidal particles. (5) The compactness of floc increases with agitation intensity and mixing time.