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DAF Technology for Various Kind of Plankton Removal from Eutrophic Lakes  

Kazuo, Taki (Department of Life and Environmental Sciences, Chiba Institute of Technology)
Yoriumi, Ishiyama (Department of Life and Environmental Sciences, Chiba Institute of Technology)
Doggo, Seog (Woosuk University, Dept. of Environmental Eng.)
Kim, Hag Su (Myoungi College, Dept. of Civil Eng.)
Publication Information
Journal of Korean Society of Water and Wastewater / v.18, no.2, 2004 , pp. 247-253 More about this Journal
Abstract
Major species of Lake Deganuma has varied depending on the season. Namely, there are Micractinium pusillum, chlorella., Scenedesmus sp. shown up in spring season, Microcystis aeruginosa, Microcystis wesenbergii, Anabena spiroides in summer and autumn season and Cyclostephanos invisitatus, Diatoma in winter season in the Lake. As the number of plankton increased, the zeta potential on their surface of them decreased. For this reason, they were dispersed in the lake though the population increased. Zeta potential of M. aeruginosa showed -20mV when their outer size got smaller. As for coagulant dosing in DAF, large amount of coagulant was effective to get lots of sludge during water treatment.
Keywords
DAF; plankton; eutrophic; microbubble; zeta potential of algae;
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