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Expensive Problem, Inexpensive Solution
Author(s) -
Hart Vincent,
Crowley Thomas,
Samandi Sam
Publication year - 2009
Publication title -
opflow
Language(s) - English
Resource type - Journals
eISSN - 1551-8701
pISSN - 0149-8029
DOI - 10.1002/j.1551-8701.2009.tb02329.x
Subject(s) - alkalinity , lime , slurry , carbon dioxide , turbidity , filtration (mathematics) , environmental science , waste management , pulp and paper industry , environmental engineering , process engineering , chemistry , engineering , materials science , mathematics , metallurgy , geology , oceanography , statistics , organic chemistry
This article discusses how advances in chemical feed equipment provide options for cost‐effective alkalinity addition. In the past, carbon dioxide systems required deep basins and a significant amount of reaction time to achieve stable water. Improved technology provides a more consistent lime feed rate and a faster‐reacting lime slurry, which can allow for addition of lime after filtration without significantly affecting finished water turbidity. The use of carbon dioxide and lime allows utilities to “dial in” finished water alkalinity and pH simultaneously.