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DOI : ,    Vol.9, No.2, 3 ~ 11, 2001
Title
A Study on Biofilm Characteristics of Biofiltration for Pretreatment of Surface Water
강용태Yong Tae Kang,양희천Hee Cheon Yang,김승진Seung Jin Kim
Abstract
This Paper evaluates the characteristics of the biofilm attached in biofiltration process for a pretreatment of surface water. The removal rate and activity of microbe was tested with respected to the variation of EBCT during start up period and stead-state period. The test was conducted with EBCT value varying -30% to +10% from the stead-state EBCT of 42 minutes. In start up period, removal rate was improved by decreasing EBCT to 20%(33.6 minutes, batch 2) from stead-state period EBCT(42 minutes, batch 4). The efficiency of KMnO₄ Consumption was improved to 22% and was maintained over 13 days. Turbidity was improved to 13.4% and was maintained over 11 days while Color and UV_(254) were improved to 12.5% and 23.6%, respectively. Color and UV_(254) were maintained over 15 days. The result of experiment indicated that adequate acclimation period under 20% reduced EBCT condition is 3 days when the biofilm formed media is used. In this experiment estimate activity for the attached microbe was found that the batch 2(EBCT 33.6 minutes) had 1.96 folds as many protein as batch 4 because decrease of EBCT led to improve activity of attached microbe.
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