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Lake Michigan Utility Tackles Corrosion Control
Author(s) -
Atassi Amrou,
Putz Andrea
Publication year - 2010
Publication title -
opflow
Language(s) - English
Resource type - Journals
eISSN - 1551-8701
pISSN - 0149-8029
DOI - 10.1002/j.1551-8701.2010.tb03051.x
Subject(s) - phosphoric acid , phosphate , environmental science , water quality , residual , controller (irrigation) , aluminium , volumetric flow rate , corrosion , deposition (geology) , water flow , environmental engineering , materials science , computer science , metallurgy , chemistry , geology , ecology , algorithm , paleontology , physics , organic chemistry , quantum mechanics , sediment , agronomy , biology
This article discusses a testing program initiated by a Lake Michigan water utility to study the occurrence of an aluminum‐phosphate compound in its distribution system, and to examine strategies to control it while maintaining optimized lead levels. Experimental methods included continuous feeding of pipe‐loop systems, using a programmable controller, at a predetermined constant flow rate for 16 hours, followed by eight hours of no flow to simulate stagnant conditions. To reduce aluminum levels in the finished water, phosphoric acid was fed at the rapid mix to combine with the residual aluminum. Data is provided on the typical raw and finished water quality, which demonstrate the reduction of aluminum and phosphate levels to minimize deposition.