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Evaluation of effect of rapid mixing intensity on chemical phosphorus removal using Al hydrolysis speciation  

Kim, Seung-Hyun (경남대학교 토목공학과)
Yoon, Dong-Soo (경남대학교 토목공학과)
Moon, Byung-Hyun (창원대학교 환경공학과)
Publication Information
Journal of Korean Society of Water and Wastewater / v.25, no.3, 2011 , pp. 367-373 More about this Journal
Abstract
Mechanism of rapid mixing effect on chemical phosphorus removal is evaluated in this study. Assuming that chemical phosphorus removal is unaffected by mixing time, only rapid mixing intensity is evaluated. In order to find out the mechanism, it is hypothesized that rapid mixing affects the Al hydrolysis speciation, and that formation of more monomeric species ($Al^a$) results in better removal of phosphorus. According to a ferron assay, more $Al^a$ formed at higher mixing intensity than at lower intensity. Subsequent experiments revealed that better phosphorus removal was obtained at higher intensity than at lower intensity, in terms of the molar ratio of $Al_{added}/P_{removed}$. The proposed hypothesis was proved in this study. Chemical phosphorus removal is affected by rapid mixing intensity due to its effect on the Al hydrolysis speciation.
Keywords
Phosphorus Rapid mixing intensity Ferron assay Aluminum Hydrolysis speciation;
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Times Cited By KSCI : 2  (Citation Analysis)
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