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Improving GAC performance by optimized coagulation
Author(s) -
Hooper Stuart M.,
Summers R. Scott,
Solarik Gabriele,
Owen Douglas M.
Publication year - 1996
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.1551-8833.1996.tb06604.x
Subject(s) - coagulation , alum , total organic carbon , chemistry , activated carbon , pulp and paper industry , water treatment , chromatography , environmental engineering , environmental science , environmental chemistry , adsorption , organic chemistry , medicine , engineering , psychiatry
Optimized coagulation results in benefits ranging from DBP reduction to improved GAC run times. The effect of optimized coagulation on granular activated carbon (GAC) performance for removal of natural organic matter and control of disinfection by‐products was investigated. Coagulation optimized for total organic carbon (TOC) removal increased GAC run times by a factor of 2–3 over run times observed for GAC receiving conventionally treated water. The improved performance was mainly a result of reductions in influent TOC and pH after optimized coagulation, as compared with conventional pretreatment. Conventional coagulation prior to GAC was more cost‐effective than optimized coagulation, because of increased costs associated with the high alum dosages used in this study.