Wash Tech

Water Quality Expectations.

By using the Propak Water Treatment Technologies reclaim system for the treatment of wastewater in the car wash industry the following quality of the water can be achieved:

• Oxygen higher than 60 %
• Oil emulsion less than 5 ppm
• PH value 6.5 – 8.0
• COD reduction 1:10
• BOD number less than 150 mg/l

TDS levels will vary in the winter time based on road salts used to de-ice roads. At locations where sewer is not available, the TDS levels will increase and may impact spotting. Where a sewer discharge is available, the RO reject and rinse water will continually dilute salt levels and maintain a lower TDS level throughout the winter.

Residual dyes may remain in the water after the biological reclaim process. Dyes used in car wash chemicals take a long time to biodegrade. The water may have a tint from the dominate dye color. This color will not impact the effectiveness of the water when reused.

The treated water is processed water and cannot be used for:

- Drinking water
- Water for preparation of food
- For personal care
- For water softeners
- For production of reverse osmosis water
- For mixing chemicals in hydro minder systems

Chemicals which are hazardous to a biological reclaim system and can not be used in the wash or maintenance process is:

• Poisons
• Herbicides
• Biocides
• Insecticides
• Pesticides
• Chlorine
• Bleach
• Hydrochloric Acid
• Hydrofluoric Acids
• Ammonium
• Ammonium Bi-fluoride