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Effect of intermittent addition on turbidity removal by polymer flocculant: computer simulation of simplified flocculation model

Kadooka, Hiroto and Miyajima, Takumi and Tanaka, Takanori and Jami, Mohammed Saedi and Iwata, Masashi (2018) Effect of intermittent addition on turbidity removal by polymer flocculant: computer simulation of simplified flocculation model. Journal of Chemical Engineering of Japan, 51 (1). pp. 71-78. ISSN 0021-9592

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Abstract

Since there are many factors which influence the process of flocculation by polymer flocculant, the scientific understanding of the flocculation mechanism is still under discussion. We have proposed a simple bridging model which expresses flocculation under various additive manners of the flocculant and enables the understanding of qualitative trends of the flocculation system. In this study, from the simulated results based on the model and experimental data, we obtained the following knowledge. 1) The intermittent addition of polymer flocculant gives better and reproducible turbidity removal. 2) The optimum dosage, which results in maximum turbidity removal in a given manner of addition, increases as the number of doses under the intermittent addition increases. 3) At a given amount of primary particles, the reproducibility at the optimum dosage of the 1-time dose is the worst among all results, irrespective of the additive manner. It could, therefore, be concluded that all these findings are originated from the difference of probability of bridging formation among particles under various additive manners.

Item Type: Article (Journal)
Additional Information: 5545/59756
Uncontrolled Keywords: Flocculation, Modelling, Polyelectrolyte, Water Treatment, Computer Simulation
Subjects: T Technology > TP Chemical technology > TP155 Chemical engineering
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User: Associate Dr. Mohammed Saedi Jami, PhD CEng MIChemE
Date Deposited: 05 Dec 2017 16:43
Last Modified: 02 Aug 2018 11:57
URI: http://irep.iium.edu.my/id/eprint/59756

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