This installation has shown that scaling, biological activity and corrosion can be controlled using only an electronic PPS device under a very extreme condition. Running a tower without blowdown and without any method to remove precipitation is clearly not appropriate; however, even in this extreme condition the system performed acceptably. Engelhard continues to use PPS on this tower, on a second tower they have recently installed in Connecticut and on a new installation in South Carolina. Engelhard is setting up a procedure on this tower to periodically flush the system to relieve accumulated solid precipitates before they become unmanageable.
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