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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received April 20, 2005
Accepted June 10, 2005

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Removal of Freshwater Diatoms (Synedra acus and Stephanodiscus sp.) by Preozonation and Addition of Polyamine Coagulant-aid

Ju Dong Lee Man Sig Lee¹ Won Sik Shin¹ Young-Hun Kim² Sang June Choi^1†

Department of Chemical & Biological Engineering, The University of British Columbia, 2216 Main Mall, Vancouver, BC, V6T 1Z4, Canada ¹Department of Environmental Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-gu, Daegu 702-701, Korea ²Department of Environmental Engineering, Andong National University, 383 Seongcheon-dong, Andong City, Gyeongbuk 760-749, Korea

sjchoi@mail.knu.ac.kr

Korean Journal of Chemical Engineering, September 2005, 22(5), 682-686(5), 10.1007/BF02705782

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Abstract

.Pilot studies were conducted for the removal of two freshwater diatoms (Synedra acus and Stephanodiscus sp.). Poly aluminum chloride (PAC), one of the coagulants commonly used in conventional potable water treatment, was found to be not effective in removing diatoms, especially for Synedra. In this work, preozonation and polyamine coagulant-aid in the presence of PAC were compared with each other and combined to investigate their performances on removing diatoms. It was found that the preozonation and polyamine coagulant-aid increased the removal rate significantly for both diatoms, better performance than PAC alone. When polyamine coagulant-aid and preozonation were combined with PAC, approximately 90% of Synedra and 100% of Stephanodiscus were eliminated. It can be concluded that the combination of preozonation and polyamine coagulant-aid in the presence of PAC could be a promising solution for removing resistant diatoms in water treatment.

Keywords

Algae Removal Synedra acus Stephanodiscus sp. Preozonation Polyamine Freshwater Diatoms

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