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Ozone dosage calculation for water treatment

Water treatment is a critical process that safeguards the safety and quality of our water supply. One of the most effective methods for water treatment is ozone treatment, known for its remarkable ability to disinfect and purify water efficiently. However, harnessing the full potential of ozone in water treatment requires precise calculations.

The Importance of Ozone Dosage Calculation

Ozone dosage calculation is the key to ensuring the right amount of ozone is introduced into the water to achieve your treatment goals. It involves considering factors such as water quality, flow rate, temperature, and target contaminants. Accurate calculation is essential to avoid under-dosing or over-dosing, which can be ineffective and costly.

Factors to Consider in Ozone Dosage Calculation

  1. Water Quality: Analyze the composition of the water, including organic and inorganic contaminants, to determine the ozone dose required for effective treatment.
  2. Flow Rate: Calculate the flow rate of the water to determine the contact time between ozone and contaminants.
  3. Target Contaminants: Identify the specific contaminants you want to eliminate and their concentration in the water. Different contaminants may require different ozone dosages.
  4. Ozone Concentration: Consider the ozone concentration generated by our ozone generator. Higher concentrations dissolve more ozone in water.

How Absolute Ozone Can Help

Absolute Ozone specializes in ozone generation systems and offers valuable resources and technology to assist in ozone dosage calculation and implementation:

  1. Advanced Ozone Generators: Our cutting-edge ozone generators ensure consistent ozone production for precise dosing.
  2. Expert Guidance: The Absolute Ozone team can help you calculate ozone dosages tailored to your water treatment needs.
  3. Ongoing Support: We are committed to optimizing your water treatment process and providing continuous support for the best results.

Useful Conversion Factors (for ozone water treatment)

For your convenience, here are some conversion factors commonly used in ozone wastewater and drinking water treatment:

  • ppm to mg/L (or g/m³): 1 ppm = 1 mg/L = 1 g/m³
  • Cubic Meters per Hour (m³/h) to Gallons per Minute (GPM): 1 m³/h = 1000 LPM = 264.2 GPM

Determining the Appropriate Amount of Ozone Required for Ozone Water Treatment

Determining the right size ozone generator for water treatment requires careful consideration of several key factors. Ozone generators are used in water treatment to disinfect, oxidize contaminants, and improve water quality. Here are the essential pieces of information you’ll need to determine the appropriate size of an ozone generator for your specific application:

  1. Water Flow Rate: The flow rate of the water you intend to treat is a critical factor. It’s typically measured in gallons per minute (GPM) or litres per minute (LPM). You need to know how much water you’ll be processing per unit of time to size the ozone generator appropriately.
  2. Ozone Requirement: Different water treatment applications require varying levels of ozone. You must determine the specific ozone concentration (in milligrams per litre, mg/L, or parts per million, ppm) required to achieve the desired water treatment goals, such as disinfection or contaminant removal. This depends on the water quality and the specific contaminants you want to target.
  3. Water Quality Parameters: Understanding the water’s initial quality is crucial. Key parameters include organic content, turbidity, pH, temperature, and specific contaminants (e.g., bacteria, viruses, iron, manganese, hydrogen sulphide, or other organic compounds). These parameters can affect ozone treatment efficiency and help select the appropriate generator. It is important to understand how the amount of ozone required is affected by the amount of ozone demand. Ozone is not selective; therefore, ozone reacts with “contaminants” in the water, affecting the ozone dosage. A water sample is required for analysis to ensure the correct dosage is provided.

Suppose you need to treat 250 GLP in your plant,  your  ozone demand is  2.5 mg/l, and your objective is to achieve an ozone concentration of 0.2 mg/L  in the water

To calculate the required ozone dosage, use the formula:

Ozone Dosage = Ozone Demand x Ozone Concentration (mg/L) × Water Flow Rate (GPM)

Ozone Dosage = 2.5 mg/L x 0.2 mg/L × 250 GPM x 3.78 L/gal x 60 min/hr = 28350

Ozone Dosage = 28350 (mg/h) * 1(g)/1000 (mg)

Ozone Dosage = 28.4 (g/h)

However, it’s essential to note that 25 g/h of ozone dissolved in water does not necessarily require a 25 g/h ozone generator. The concentration of ozone is a critical factor in mass transfer efficiency. For example, the Atlas 30 produces ozone at high concentrations, allowing it to dissolve nearly 90% of the ozone. In contrast, air-feed ozone machines produce ozone at much lower concentrations, resulting in only 4-5% of ozone being dissolved. Therefore, choosing a high-performance ozone generator with precision is crucial to ensure optimal results in industrial applications.

Ozone wastewater application diagram

Ready to Optimize Your Water Treatment Process?

Determining the right size ozone generator for your water treatment application is crucial. Whether you want to disinfect, oxidize contaminants, or improve water quality, we’re here to help you make informed decisions. Let us assist you in achieving the best results for your specific needs.

Contact us today for expert guidance and support in your ozone water treatment journey.

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