EcoWater CHC Series, Service And Troubleshooting Manual

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5.9 Algae and Biofilms-
5.9.1 Algae growing in tower in sunlit areas-
This is not a failure. The CHC system can only retard water- borne algae. The use of a
chemical algaecide to treat the algae is recommended unless requested by the customer. You
can also recommend covering the affected areas with a sun screen to reduce the algae growth
rate. Many of our customers have used a cover made out of corrugated fiberglass to cover the
exposed ends of a tower next to the fill, these covers have been shown to be very efficient at
reducing algae growths on the ends of the towers. The use of a Biodispersant has also been
shown to be affective against Algae. The Biodispersant will in most cases release the Algae so
that it can be destroyed by the CHC chamber and removed by filtration. CHC has some
experience with an Ultrasonic Algae killing systems as well as Copper Silver Ionizers. If you
are interested about this system contact EcoWater CHC Service for further information.
5.9.2 Biofilms-
This is not a failure. The CHC system can only treat water- borne growths it cannot treat films
growing in the piping or on other surfaces. The use of a Biodispersant has also been shown to
be affective against Biofilms by releasing its grip on the surface until it can be treated by the
CHC chamber. We have seen accounts where they were next to a farm and fertilizer (manure)
was being ingested into the tower and causing a food source for the biofilm. I am also aware of
a food plant that also uses their cooling water to cool a process, where product was getting into
the cooling tower water causing a biofilm growth. It is important that you not only treat the
symptom, but you must also find and treat the source.