Treatment of Wastewater with High Organic Loadings Using Granular Sludge in Sequencing Batch Reactor

다국어 초록 (Multilingual Abstract)

The objectives of this research to evaluate the effects of aerobic granular sludge SBR on the treatment of the wastewater with high level of organic loadings was to investigate the characteristics of operating conditions of the reactor and the characteristics of organic and nutrient removal with influent loadings. As a results, the pH values increased in the range of 6.8 to 8.5 during a cycle. DO concentrations were in the range of 6-8mg/L and decreased slightly at the initial operating period as a results of initial oxygen consumption due to the removal of considerable amount of organic at initial reaction. Within operating time of two weeks, MLSS concentration ranged from 500 to 4480 mg/L and sludge volume index (SVI) were in the range of 25 to 8 mL/g at steady state. At influent concentrations of 400-700mg COD/L, approximate <30mg TN/L, and <16 mg TP/L, the percentage of organic and nutrient removals were in the range of 45 to 77% for COD, 46.7 to 71.0% for TN, and 67.3 to 74.0% for TP, respectively. It seems that aerobic granulation is not sensitive to the organic loading rate. Although the effect of organic loading rate on the formation of aerobic granules is insignificant, the physical characteristics of aerobic granules depend on the organic loading rate.

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