Car Wash Water Recycling.
Using a Triton CW60T Water Treatment Plant:

The Triton CW150T is designed to reuse water from Car Wash operations. The water is filtered to achieve particles of less than 3 microns, reduce colour and contaminants in the water and give bacterial control.

Overview

Current procedure: Hand Car Washes.

The vehicle is washed using mains water, with detergent and high pressure hand guns, a final rinse is then carried out using mains water which may be treated by Reverse Osmosis (RO). Standard town water requires the vehicle to be dried with a chamois whereas RO water does not (as all the minerals are removed from the water with this process). The used water, which contains oils, dirt, particles and detergents etc., is passed through an interceptor which separates the oil and silts and releases the remaining water to sewerage.

Requirements for recycling water:

All particles above 3 microns should be removed as these will damage the high pressure gun nozzles and the car paint work. It is desirable to make the water as clean as possible. Oil and hydrocarbons need to be removed along with other undissolved and dissolved contaminants. Another factor that should be considered is bacterial control. High pressure guns will create fine airborne water particles which can carry bacteria and infect people coming into contact with them. Therefore some form of bacterial control is necessary

Proposed method of operation reusing the wash water:

The used water which would normally go to sewer is pumped from the interceptor and passed through the AWF CW40T / CW150T filtration unit. This unit adjusts the pH, achieves filtration down to 3 microns, clarifies the water, typically giving 4 turbidity units (Aust Drinking Water Guidelines requires 5 or less) and disinfects the water. This water is highly suitable for the initial wash operations. The final rinse can still be carried out using mains water as before. The whole system will have water losses due to evaporation etc. and using mains water for the final rinse tops up the system. 

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