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DOI : ,    Vol.6, No.1, 25 ~ 33, 1998
Title
Characteristics of Backwashing Factors in Ultrafiltratlon for Wastewater Reclamation
안규홍Kyu Hong Ahn,송경근Kyung Guen Song
Abstract
To prevent membrane fouling, backwashing with permeate was applied to ultrafiltration process for wastewater reclamation. This study investigated the effect of backwashing factors such as the interval and duration, and proposed their adequate selection method for design. Backwashing with permeate was found to reduce membrane fouling significantly. Permeate flux decreased as backwashing interval increased. Since the degree of permeability recovery by physical washing (surface washing) reached its minimum value at the 30 minutes of backwashing interval (and didn`t change at longer intervals), it was concluded that the interval should be maintained less than 30 minutes. Permeate flux and permeability recovered by physical washing increased as backwashing duration increased. In the comparison of two backwashing conditions, decreasing backwashing interval was more efficient in enhancing permeability than increasing backwashing duration.
Key Words
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