Abstract
ABSTRACT The purpose of this study is to remove suspended solids (SS) and soluble organic matter from waste water using meshed synthetic tubes, made of synthetic poly propylene fiber to allow free water flow from any direction. The capacity of 450 m3/d pilot plant was operated to treat effluent of secondary settling tank in sewage treatment plant. Removals of SS, soluble organic matter and phosphorus (w/additional chemical treatment), were monitored. As a result, maximum SS-loading rate for the plant was found 3.8 kg SS/m3 d, and operation time was limited up to 45 h, and the maximum linear velocity was found 16 m3/m2 h. The maximum SS removal for each unit reactor was 7.1 kg/cage m3. With the meshed tube biofilter, not only SS but also soluble organic matter removal and nitrification were observed. Because of its relatively fast filtration rate and high filtration capacity, it seemed to be used properly as a direct filtration.
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