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Comparing Aluminum and Iron Coagulants for In‐line Filtration of Cold Water
Author(s) -
Haarhoff Johannes,
Cleasby John L.
Publication year - 1988
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.1551-8833.1988.tb03022.x
Subject(s) - turbidity , sulfate , chloride , aluminium , filtration (mathematics) , clogging , ferric , chemistry , pulp and paper industry , environmental engineering , environmental chemistry , environmental science , inorganic chemistry , geology , statistics , oceanography , mathematics , organic chemistry , archaeology , engineering , history
Pilot studies showed that with water temperatures <;37°F (3°C) and raw water turbidities <;2 ntu, ferric chloride removed turbidity more efficiently than did aluminum sulfate but that aluminum sulfate caused slower head loss development. The total clogging head loss at the onset of turbidity breakthrough, however, was approximately the same for both coagulants. Equivalent head loss development and turbidity removal were demonstrated at a molar iron‐to‐aluminum dosage ratio of 3:5.6.