Chemical vs. Non-chemical Cooling WaterTreatments – a Side-by-Side Comparison

摘要

Two non-chemical cooling water treatment technologies, a pulsed power system, and a hydrodynamicrncavitation device, were evaluated against conventional chemical treatment in a detailed six-month study. The comparisonrnwas conducted at Alcoa’s Mt. Holly Works in Goose Creek, SC. Three identical, non-contact, evaporative coolers used torncool air compressor systems were used as the test sites. The three technologies were installed on the external 600-gpm sprayrnwater loop in these towers. The towers were operated at a range of setpoints representing between 4 – 20 cycles ofrnconcentration. Water quality parameters, corrosion, scaling indices, microbiological (aerobic and anaerobic planktonic andrnsessile, Legionella), and aquatic toxicity data/results will be presented for the different operating conditions. Operating costrncomparisons will also be shared. Conclusions and Recommendations will be presented.