Honda manufacturing in Japan experienced suboptimal results from regular chemical treatments and performed a test of Hydropath technology in several areas of their facility, including heat exchangers, cooling towers and oil coolers. The results after 108 days were that scale had not formed and old scale was removed from the use of Hydropath without chemicals. Algae and Legionella pneumophila were controlled. Honda installed several Hydropath units throughout their plant with continued success.
Chemical treatment had no effect against inhibition of algae growth which is very important in acting against legionella pneumophila. Hydropath treatment had an excellent effect on removing algae in cooling towers . After stopping the chemical additive, Hydropath (AquaKlear) was confirmed to allow zero scaling in the heat exchanger after 108 days use.
As the exchangers were only opened every three years, no direct comparison could be made with the chemical treatment. However, there was no scale or slime in the heat exchanger after the installation of Hydropath (AquaKlear). The customer would normally expect to see both scale and biofilm build-up upon inspection, and therefore the fact that neither could be seen was due to AquaKlear.
The old scale on the cooling tower fins was removed. Some scale looking like a powder was precipitated in the bottom of basin of the cooling tower. The customer concluded following this test that AquaKlear is a better treatment method than chemicals, considering also that there is no chemical pollution.
Honda manufacturing continues to rely on Hydropath technology for scale and bacteria control.