Introduction to Ozone for Water Treatment
An ozone water treatment system reduces contaminants using the oxidative power of ozone. Ozone is created in ozone generators and is used to treat water. The ozone is then injected into the water and immediately eliminates contaminants, such as bacteria, viruses, and metals. This article is an introduction to ozone water treatment.
Ozone is a triatomic form of oxygen with the chemical formula O3. It is a pale blue gas with a distinctively pungent smell. In addition to being natural, ozone gas can also be generated industrially. Its atomic structure strongly influences its reactivity. The extra oxygen atom can easily attach to other substances. That means ozone is an unstable molecule that decomposes to oxygen. So, It must be produced on-site as used. The Typical half-life of ozone gas at 20 C is 3 days and 20 minutes when ozone is dissolved in water.
- Ozone is an excellent broad-spectrum oxidizing
- Ozone is a strong chemical oxidant
- Reduces the toxicity of organic compounds
- can be combined with UV or Peroxide to generate hydroxyl radicals to create an advanced oxidation process
Ozone is a very strong oxidant and virucide and is widely used for disinfection, Ozone destroyed bacteria because it directs protoplasmatic oxidation resulting in cell wall disintegration.
The effectiveness of a biocide in drinking water disinfection system is normally described by its concentration-time or CT value which is defined as a product of the average concentration of ozone( residual) multiplied by the exposure time
The Main Components of an ozone water treatment system are the feed gas source + ozone generator + ozone transfer system
Oxygen-feed ozone generators are the best choice for all industrial applications.
- We recommended using a PSA Oxygen concentrators to produce Ozone
- oxygen concentrator produces oxygen with 90-95% of purity
- Oxygen feed Ozone generator results in a concentration of 4-20 wt.%
- Air feed Ozone generator results in a very lower concentration of 1-3 wt.% (not suitable for water applications)
Air-feed generators are not suitable for most industrial applications. Remember that only 21% of air is oxygen this significantly affects the ozone concentration that a generator can achieve. In addition, inside the cells, the remaining 78% of the nitrogen will form nitric oxide deposits. In this way, ozone production will gradually decrease after a few months.
Absolute Ozone® – ozone generators are equipped with a Dialectric Barrier Plasma Discharge cell. Absolute Ozone® air colled equipment produces ozone at very high concentrations typically in the range of 5 to 16 wt.%.
- Low Oxygen Requirement 2-3 slpm for 1 ppd of ozone
- High-Pressure Range 10-120 PSIG working pressure
- PCOP System – Pressure Compensated Ozone Production System
- Air Cooled, works well at up to +40C, no need to pay for water, water conditioning & air conditioning systems
- No Maintenance, no serviceable parts, leakproof construction tested at up to 150 PSIG, reliable, less operating cost.
- 5 Years Warranty & “Right on Spec” Performance Warranty, The only warranty that Guarantees performance, in the ozone industry
Ozone needs to be dissolved into water. Ozone gas is partially soluble in the liquid, the solubility efficiency depends on factors such as temperature pressure, and concentration. However, using proper methods and equipment high mass transfer efficiencies can be reached.
Venturi-based mass transfer systems are the preferred method for dissolving ozone in water due to their simplicity, economy, and effectiveness. Venturi injector has about 90% efficient and can be up to 99% efficient at dissolving ozone into the water.