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A Study on Possibility of Sedimentation Basin Omission After Installed Membrane System in Drinking Water Treatment  

Kim, Hyung-Sun (숭실대학교 환경.화학공학과)
Zhoh, Choon-Koo (숭실대학교 환경.화학공학과)
Hong, Seong-Ho (숭실대학교 환경.화학공학과)
Kim, Sung-Jin (숭실대학교 환경.화학공학과)
Lee, Kil-Sook ((주)대우)
Publication Information
Journal of Korean Society of Water and Wastewater / v.20, no.3, 2006 , pp. 403-410 More about this Journal
Abstract
The objective of this study was to evaluate the possibility of sedimentation basin omission when installed hybrid membrane filtration process in the field plant with the capacity of $500m^3/day$ for 11 months in the "G", water purification plant in Seoul. In order to evaluate the possibility of the sedimentation basin omission, we measured the change of DOC by coagulant dosage. Dosage of PAC(power activated carbon) 4mg/L and coagulant($AI_2O_3$ 10%) 1.67mg/L were compatible to meet the water quality. Also according to the experiment without settlement process, optimization G values were determined to be 300/s, 64/s, and 32/s at the mixing tank, the first flocculator and the second flocculator, respectively. The test was performed under the conditions PAC-coagulation-no settlement-MF. As a result, a dosage of 4.0mg/L as PAC and 0.86 to 1.22mg/L as $Al_2O_3$(10%) in the condition of flux of 62.5LMH were determined to keep TMP value less than $1.0kg_f/cm^2$.
Keywords
PAC; MF; UF; OOC; sedimentation basin; coagulant;
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