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Tertiary Treatment of Municipal Wastewater and Bypassed Rainfall Treatment using by BAF  

Lee, Kwang Je (Korea Engineering Consultants Corporation)
Park, Jae-Hong (Watershed Management Research Division, National Institute of Environmental Research)
Publication Information
Journal of Korean Society on Water Environment / v.21, no.4, 2005 , pp. 327-331 More about this Journal
Abstract
The study was conducted with two laboratory biological aerated filter (BAF) reactors: denitrification filter (DF) and nitrification BAF. The influent flow (Q) was fixed to 48 L/d and total empty bed contact time (EBCT) was 1 hr. The flow direction was upflow with NRCY of 1 to 2Q. The secondary effluent was fed to the reactors and the influent concentrations were adjusted with some stock solutions to simulate by-pass concentration during rainfall. The study results indicate that COD and SS removal efficiencies were excellent and not influenced by temperature. Nitrification efficiency was over 90% at the influent loading less than $1.12kg/media\;m^3/d$, but the efficiencies were decreased in low temperature. TN removal efficiencies were 10% to 60%.
Keywords
Biological aerated filter; Bypassed rainfall; Media; Backwash;
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