標題: | Nano-bubble flotation technology with coagulation process for the cost-effective treatment of chemical mechanical polishing wastewater |
作者: | Tsai, Jen-Chieh Kumar, Mathava Chen, Shen-Yi Lin, Jih-Gaw 環境工程研究所 Institute of Environmental Engineering |
關鍵字: | chemical mechanical polishing;coagulation;flotation;nano-bubble;response surface methodology |
公開日期: | 1-十二月-2007 |
摘要: | The feasibility of nano-bubble flotation technology (NBFT) with coagulation/flocculation process for the enhanced treatment of chemical mechanical polishing (CMP) wastewater was investigated through laboratory and pilot-scale experiments. As a precursor, the effective combination of activator/collector was identified using a laboratory-scale flotation reactor. The results showed that polyaluminum chloride (PAC)/sodium oleate (NaOl) was the best combination of activator/collector, respectively and its application in the NBFT with coagulation process increased the wastewater clarification efficiency by 40% as compared with traditional coagulation/flocculation process. More than 95% turbidity, total solids and total silica removal efficiencies were observed in the pilot-scale flotation experiments. From the results, it was found that NBFT with coagulation process could be performed effectively at an optimum PAC concentration of 50-60 mg/L (as Al), NaOl concentration of 5-10 mg/L with a recycle ratio of 10-20% and I h hydraulic retention time HRT. The cost and performance assessment reflected that CMP wastewater could be treated efficiently at a minimum cost using the present approach. (c) 2007 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.seppur.2007.07.022 http://hdl.handle.net/11536/10032 |
ISSN: | 1383-5866 |
DOI: | 10.1016/j.seppur.2007.07.022 |
期刊: | SEPARATION AND PURIFICATION TECHNOLOGY |
Volume: | 58 |
Issue: | 1 |
起始頁: | 61 |
結束頁: | 67 |
顯示於類別: | 期刊論文 |