LAPSE:2020.0535
Published Article
LAPSE:2020.0535
Evaluating Pre- and Post-Coagulation Configuration of Dissolved Air Flotation Using Response Surface Methodology
June 3, 2020
The effects of coagulation-dissolved air flotation (DAF) process configuration was studied on oil refinery wastewater. The configuration was done in two ways: acid-coagulation-DAF (pre-treatment) and acid-DAF-coagulation (post-treatment). Two different cationic and polymeric organic coagulants were employed in this study to compare their treatability performance with the two aforementioned configurations. All the coagulants applied before the DAF were found to be effective, with over 85% more contaminant removal efficiency than their post-treatment. Alum, being the most cost-effective coagulant, was then employed with response surface methodology (RSM) to obtain the optimum conditions. These include a coagulant dosage of 100 mg/L, air saturator pressure of 375 kPa and air−water ratio of 10% vol/vol corresponding to a desirability of 92% for the removal of oily pollutants from a local South Africa oil refinery’s wastewater. With the response quadratic models that were developed, the optimum conditions were tested experimentally, which were consistent with the models predicted results at a 95% confidence level.
Keywords
coagulants, Coagulation, dissolved air flotation, oil refinery wastewater, response surface methodology
Suggested Citation
Kweinor Tetteh E, Rathilal S. Evaluating Pre- and Post-Coagulation Configuration of Dissolved Air Flotation Using Response Surface Methodology. (2020). LAPSE:2020.0535
Author Affiliations
Kweinor Tetteh E: Faculty of Engineering and the Built Environment, Department of Chemical Engineering, Durban University of Technology, Steve Biko Campus (S4 Level 1) Box 1334, Durban 4000, South Africa [ORCID]
Rathilal S: Faculty of Engineering and the Built Environment, Department of Chemical Engineering, Durban University of Technology, Steve Biko Campus (S4 Level 1) Box 1334, Durban 4000, South Africa [ORCID]
Journal Name
Processes
Volume
8
Issue
4
Article Number
E383
Year
2020
Publication Date
2020-03-25
Published Version
ISSN
2227-9717
Version Comments
Original Submission
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PII: pr8040383, Publication Type: Journal Article
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LAPSE:2020.0535
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doi:10.3390/pr8040383
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Jun 3, 2020
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CC BY 4.0
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Jun 3, 2020
 
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Original Submitter
Calvin Tsay
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