Ozone Water Disinfection Cost

Ozone water treatment system have become popular for purifying water due to their effectiveness and environmental friendliness. However, as with any water treatment method, there are costs associated with ozone water treatment. In this article, we’ll show the cost calculations for any ozone water treatment systems and provide helpful insights to help you make informed decisions for your water purification treatment needs. So, let’s dive in!

The government ozone requirement for water disinfection varies depending on the country and jurisdiction. However, a concentration between 0.2-0.4 ppm of ozone dissolved in water will work to ensure a complete water disinfection process. First, let us accept a target concentration of 0.5 ppm so there is some contingency. Also, I suggest an ozone water treatment system working in an industrial environment 24/7 for this calculation.

Atlas 30 ozone generator made by Absolute Ozone® is capable of dissolving in water 20-25 g/h out of 30 g/h of ozone gas produced, as typically, the ozone gas concentration of this generator is 8-9% by Wt. Furthermore, in our experiments and information from some of our customers, 27g/h of dissolved ozone amounts were achieved; however, for contingency purposes, again, I would use only 20 g/h of dissolved ozone in my calculations.

1 ppm (One part per million) equals one unit for every one million units of the mixture. One ppm is equivalent to 1 gram of the substance per m3 solution. So, 1 g of ozone gas dissolved in 1 m3 will create a concentration of 1 ppm or 1 g/m3. So, the 20 g/h will create a concentration of 1 ppm in 20 m3/h or 0.5 ppm in 40 m³/h

We have Absolute Ozone® Generators in the field working without any maintenance, service, or spare parts now for over 20 years. My inspection of some of these units revealed no deterioration “wear or tear” inside these units, and they probably will last another 20 years, as there is no reason for them to stop. However, I will use only 20 years of service life for these calculations. 20 years x 365 days x 24 hours = 175,200 hours (over 20 years)

The Atlas 30 utilizes under 250 watts of power, while the Oxygen Concentration unit uses 300 watts, and the injection pump adds another 45 watts to the system’s total power consumption. The air pump plays a crucial role in delivering ozone and aiding the effectiveness of the ozone generation and water treatment functions. I will assume that the total power consumption of the ozone treatment will be 700 Watts to be on the safe side. I understand electricity costs differently in different states or countries but pay 11 cents per 1 KWh. $11 x 700 = $0.077 US total power cost per hour of the system.

As the system is disinfecting 40 m³/h costing $0.077/h the cost per 1 m3 is $0.077÷40 m³ = $0.001925/m³. As you can see, it is not very significant. Ozone generation is highly efficient, making the cost per m³ very low.

The list cost of equipment service and amortization over 20 years from our experience with our customers and published on our website list prices will be:

• Atlas 30 – $5,200 US
• Atlas 30 Service – $0
• AirSep Oxygen – $2,300 US
• AirSep Service over 20 years – $1,000
• Ozone pump – $350 US
• Service – probably $0, but I will add $350 US
• Accessories, PVC plumbing, Misc. – $500 US
• Total: $9,700 US

Let us assume that it is $10,000 over the full-service life to be on the safe side.
Variable ozone output controls can impact the cost, but they ensure precise and efficient ozone output.
The total amount of water disinfected over 20 years will be 40 m3/h x 175,200 hours = 7,008,000 m³
Then, the price of the hardware per 1 m³ of water is: $10,000 ÷ 7,008,000 m³ = ~$0.0014 US

Total price per 1 m3 power plus hardware amortization and service: $0.0014 + $0.0019 US = $0.0033 US

If my math is correct and everyone is welcome to verify it, this number is identical to the one I had indicated in my earlier comments. The ozone water treatment system’s price is $0.003 or 0.3 cent/m³

All information above is based on facts and can be easily verified by anyone.

We will always be glad to assist further.