Flock Growth Kinetics for Flocculation in an Agitated Tank

Acta Polytechnica

R. Šulc¹  O. Svačina¹ 

关键词: flocculation;    flock growth;    flock size;    mixing;    Rushton turbine;    kaolin slurry;   

DOI  :  

来源: Czech Technical University in Prague, Faculty of M

【 摘 要 】

Flock growth kinetics was investigated in baffled tank agitated by a Rushton turbine at mixing intensity 40 W/m 3and kaolin concentration 0.44 g/l. The tests were carried out with a model wastewater (a suspension of tap water and kaolin). The model wastewater was flocculated with organic Sokoflok 56 A flocculant (solution 0.1 % wt.). The flock size and flock shape were investigated by image analysis. A simple semiempirical generalized correlation for flock growth kinetics was proposed, and was used for data treatment. The flock shape was characterized by fractal dimension D f2 . Using the statistical hypothesis test, the fractal dimension was found to be independent of flocculation time, and the value D f2= 1.442 ± 0.125 was determined as the average value for the given conditions.

【 授权许可】

Unknown