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Water Quality Improvement of Stagnant Water using an Upflow Activated Carbon Biofilm Process and Microbial Community Analysis  

Oh, Yu-Mi (School of Civil and Environmental Engineering, Pusan National University)
Lee, Jae-Ho (SU engineering Co. Ltd.)
Park, Jeung-Jin (SU engineering Co. Ltd.)
Choi, Gi-Choong (SU engineering Co. Ltd.)
Park, Tae-Joo (Korea Environmental Institute)
Lee, Tae-Ho (School of Civil and Environmental Engineering, Pusan National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.32, no.1, 2010 , pp. 23-32 More about this Journal
Abstract
The capacity of natural purification was limited by the interruption of natural flow and the problems such as eutrophication were occurred by nutritive salts accumulation in stagnant stream. Moreover, the inflow of non-point sources causes non-degradable materials to increase in stagnant stream. In this study, an upflow biological activated carbon (BAC) biofilm process comprised of anoxic, aerobic 1, and aerobic 2 reactors were introduced for treatment of stagnant stream and SS, $BOD_5$, $COD_{Mn}$, $COD_{Cr}$, TN, and TP were monitored in the upflow BAC biofilm reactors with continuous cycling. In order to simulate stagnant stream, the lake water of amusement park and golf course were stored as influent in a tank of $2m^3$ and hydraulic retention time (HRT) was changed into 6, 4, and 2 hours. At HRT 4hr and the lake water of amusement park as influent, the removal efficiencies of SS, $BOD_5$, $COD_{Mn}$, $COD_{Cr}$, TN, and TP showed the best water quality improvement and were 69.8, 83.0, 91.3, 74.1, 74.7, and 88.9%, respectively. At HRT 4hr and the lake water of golf course as influent, the removal efficiencies of SS, $BOD_5$, $COD_{Mn}$, $COD_{Cr}$, TN and TP were 78.5, 78.0, 80.2, 74.9, 55.6 and 97.5%, respectively. As the results of polymerase chain reaction - denaturing gel gradient electrophoresis (PCR-DGGE), microbial community was different depending on influent type. Fluorescence in situ hybridization (FISH) showed that nitrifying bacteria was dominant at HRT 4 hr. The biomass amount and microbial activities by INT-DHA test were not decrease even at lower HRT condition. In this study, the upflow BAC biofilm process would be considered to the water quality improvement of stagnant stream.
Keywords
Biofilm; Fluorescence in situ hybridization(FISH); Microbial community; PCR-DGGE; Stagnant stream;
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