Fractal Growth Characteristics of Flocs in Flocculation Process in Water Treatment

被引：6

作者：

Nan, Jun ^{[1
]}

He, Weipeng ^{[1
]}

Song, Juanjuan ^{[1
]}

Song, Xinxin ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Municipal & Environm Engn, State Key Lab Urban Water Resource & Environm, Harbin 150006, Peoples R China

来源：

ICEET: 2009 INTERNATIONAL CONFERENCE ON ENERGY AND ENVIRONMENT TECHNOLOGY, VOL 2, PROCEEDINGS | 2009年

关键词：

flocculation; floc configuration; diffusion-limited aggregation (DLA) model; fractal growth; SIZE DISTRIBUTION; SHEAR; EVOLUTION; STRENGTH;

D O I：

10.1109/ICEET.2009.379

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The fractal growth characteristics of flocs in flocculation process in water treatment was discussed based on diffusion-limited aggregation (DLA) mechanism. Modern structure characterization technology was employed to evaluate the impact of coagulant dosage and slow stirring speed, etc. on the evolution of floc configuration and structure. Combining macroscopic flocculation effect with microscopic floc morphology, accurate quantitative description and interpretation of the flocculation process can be achieved to predict flocculation effect. Moreover, a new fractal dimension called fractal dimension of floc growth was proposed. Feasibility study on its competency of demonstrating the flocculation effect showed that the fractal dimension of floc growth could be used to characterize the variation of floc size and strength in flocculation process and that there was a good correlation between fractal dimension and residual turbidity at different turbidity of raw water. Thereby, the index, capable of reflecting the changes of flocculation effect can be used to optimize flocculation conditions, enhance flocculation efficiency, improve the quality of outflow and cut down the cost of water treatment.

引用

页码：582 / 588

页数：7

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