A KINETIC-MODEL FOR DISSOLVED AIR FLOTATION IN WATER AND WASTE-WATER TREATMENT

被引：38

作者：

FUKUSHI, K ^{[1
]}

TAMBO, N ^{[1
]}

MATSUI, Y ^{[1
]}

机构：

[1] HOKKAIDO UNIV,DEPT SANIT & ENVIRONM ENGN,SAPPORO,HOKKAIDO 060,JAPAN

来源：

WATER SCIENCE AND TECHNOLOGY | 1995年 / 31卷 / 3-4期

关键词：

DISSOLVED AIR FLOTATION; KINETICS; POPULATION BALANCE MODEL; BUBBLE FLOC COLLISION AND ATTACHMENT; DRINKING WATER TREATMENT; COAGULATION; FLOCCULATION;

D O I：

10.1016/0273-1223(95)00202-X

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A kinetic model for DAF is presented. The author's kinetic model consists of the equations for describing a process of bubble-flee collision and attachment in a mixing zone, and a rise velocity of bubble-flee agglomerates in a flotation tank. The attachment process is formulated on a population balance model with bubbles and flocs as a flocculation in a turbulent flow. The rise velocity of bubble-flee agglomerates is formulated with size of flocs and composition of flocs including the flee density function and attached bubble number. The experimental verification was carried out, using a batch flotation tester and a mini-plant with synthetic clay suspension and colored water. The results successfully verify the validity of the model. From a given condition such as flee size and attached bubble number, the rate and extent of removal by DAF can be readily assessed by the model. A single-collector collision model, often discussed in some occasions, seems to be not useful to describe the DAF process.

引用

页码：37 / 47

页数：11

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