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Direct filtation: polymer in backwash serves dual purpose
Author(s) -
Yapijakis Constantine
Publication year - 1982
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1982.tb04958.x
Subject(s) - backwashing , turbidity , filtration (mathematics) , sedimentation , settling , flocculation , raw water , filter (signal processing) , pulp and paper industry , water treatment , environmental science , thickening , suspended solids , environmental engineering , materials science , mathematics , wastewater , geology , computer science , engineering , paleontology , oceanography , statistics , sediment , inlet , geomorphology , computer vision
Direct filtration has been used as a viable alternative to complete, conventional treatment systems that employ flocculation–sedimentation prior to filtration where the raw water source is relatively unpolluted and is low in color and turbidity. By adding a polymer to the water to be used for filter backwashing, a reduction of the initial turbidity breakthrough period and peak can be obtained in addition to a much Improved settling–thickening rate for the backwash solids.