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Characteristics of Organics Treatment Using White-rot Fungus Biofilm of Atmospheric Exposed Type  

Lee, Soon-Young (Jeonbuk Regional Environmental Technology Development Center)
Kang, Ki-Cheol (Department of Environmental Engineering, Chonbuk National University)
Won, Chan-Hi (Department of Environmental Engineering, Chonbuk National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.30, no.5, 2008 , pp. 491-499 More about this Journal
Abstract
It is really urgent to develop wastewater treatment system which is economically efficient, occupies small area for buildup, can be easily operated, discharges small amount of sludge due to the more strict water quality standard, the expensive water and energy cost and so on. This study on treatment of wastewater including nonbiodegadable materials using white-rot fungus biofilm were designed to investigate the submerged type of biofilm, hydraulic retention times, recycle rates, and module turning times. Removal efficiencies of fully exposed biofilm type in atmosphere are similar to submerged biofilm of aeration type. The optimum conditions of white-rot fungus biofilm of fully exposed type in atmosphere are HRT 3$\sim$4 hr, recycle rate 6$\sim$10 Q, module turning times 0.5$\sim$2 times/min. At this time, removal efficiencies of organics were COD$_{Cr}$ 65.0$\sim$69.9%, NBDCOD 70.4$\sim$72.7%, BOD$_5$ 88.8$\sim$90.1%, SS 84.2$\sim$90.4%. Moreover average effluent concentration of BOD$_5$(8.9 mg/L) satisfied water quality standard of heavy water(BOD$_5$ less than 10 mg/L) but concentration of NBDCOD(29.6 mg/L) was higher than water quality standard of heavy water(NBDCOD less than 20 mg/L).
Keywords
HBC Ring Media; Phanerochaete chrysosporium PSBL-1; Biofilm; Organics;
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