The application of the Taguchi method in the evaluation of mechanical flotation in waste activated sludge thickening

被引：20

作者：

du Plessis, Barend J. ^{[1
]}

de Villiers, G. H. ^{[1
]}

机构：

[1] Univ Pretoria, Dept Chem Engn, ZA-0002 Pretoria, South Africa

来源：

RESOURCES CONSERVATION AND RECYCLING | 2007年 / 50卷 / 02期

关键词：

mechanical flotation; waste activated sludge thickening; Taguchi method;

D O I：

10.1016/j.resconrec.2006.06.014

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Dissolved air flotation (DAF) is generally used for thickening of waste activated sludge (WAS). Mechanical flotation (MF) is used in the metallurgical industry for selectively recovering minerals from ore. In this study the potential of MF to thicken WAS was investigated. The Taguchi experimental design was followed to investigate the effect of airflow rate, residence time, impeller speed, surfactant dosing, sludge dilution and their interactions. Results indicate that MF with surfactant addition shows potential to thicken WAS and should be investigated further on a bigger scale. The surfactant dosing contribution to thickening is significant at a 95% confidence level. The interactions between residence time and impeller speed, residence time and airflow rate and residence time and surfactant dosing were also found to be significant at a 95% confidence level. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：202 / 210

页数：9

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