PURE WATER PRODUCTION FOR INDUSTRIAL APPLICATIONS:
REVERSE OSMOSIS VS. ION EXCHANGE:
Electrocoat systems require clean water of certain criteria for the pretreatment final rinse, paint post rinse, and electrocoat tank. The ions introduced into these processes must be kept to a minimum, among other requirements. Normally, these criteria can be met by reverse osmosis or ion exchange (RO and DI respectively).
Comparison of RO vs. DI technology:
- RO purity is continuous while DI gets progressively worse as the resin nears regeneration.
- DI chemicals are expensive and therefore operating costs are higher than RO per gallon of purified water.
- RO membranes are a physical barrier that removes bacteria, viruses, algae and suspended solids while DI systems do not remove these contaminants.
- DI uses two hazardous chemicals, hydrochloric acid (HCl) and caustic soda (NaOH), for regenerating the resin beds; these chemicals have special storage and disposal requirements.
- RO systems have a continual concentrate effluent of 15-35%, but this does not require treatment before discharge to drain in the USA.
- RO systems produce pure water of 5-15 Microseimens. DI systems can produce pure water down to 1 Microseimens. Most pure water requirements can easily be met with RO systems.
- DI systems typically are marginally less expensive but RO systems cost much less to operate resulting in lower operating cost.
- DI resin bed life and RO elements life are similar at around 2-4 years. RO elements do not have hazardous disposal requirements.
- RO cleaning chemicals are not hazardous so they do not require special handling, storage or disposal procedures.
- RO systems are overall less expensive to operate and require less labor to maintain than DI systems.
THE RIGHT SOLUTION FOR YOU
Contact Us today to learn more about how we can help you solve your water quality problems and provide a solution that helps
reduce costs, improves efficiencies and meets regulatory standards.