Ozone Water Treatment
Ozone applications in water treatment not only kill pathogens and organics in the water but also removes iron & manganese, H2S, antibiotics. Reduces COD and removes colour therefore many factories and plants can discharge their water without sending it to a treatment first.
For many years, ozone water treatment technology has been commercialized in municipal wastewater treatment plants and commercially as a powerful non-chemical disinfectant. Ozone has been used in municipal water purification, water filling plants and other commercial and industrial processes for over 100 years.
Ozone is used in wastewater plants, drinking water plants, RAS plants, bottling plants, Aquariums, swimming pools, in short, wherever the water is.
Ozone is used effectively in the treatment of water contaminated with industrial by-products. Ozone is a strong oxidizing agent and is very effective when used to disinfect water. Ozone is a fast oxidizing agent for metals such as iron and manganese and can be used initially for water pre-treatment. The content of iron and manganese in water can be reduced to very low and safe levels by oxidation with ozone.
In ozone treatment, disinfection occurs mainly at the point of contact of ozone with water. For proper disinfection of water with chlorine or ozone, there must be sufficient chlorine or ozone residue in mg/l (i.e. parts per million or parts per million) in the water and sufficient contact minutes for disinfection to occur. The pH of the water (how acidic or alkaline it is) along with turbidity and other contaminants play a role in the effectiveness of chlorine or ozone in disinfecting water from bacteria.
What Does Ozone Water Treatment Do?
Ozone water treatment can quickly disinfect water and kill bacteria and viruses, but unlike chlorine, it leaves no chemical chlorine residue behind. Ozone has been used successfully for water disinfection and can kill most bacteria, viruses and protozoa. When combined with other techniques, ozonation is by far one of the most effective and affordable treatment options.
Ozone does not produce harmful residues or disinfection by-products that must be removed after treatment, making it one of the most effective disinfection methods. Ozonation can be used in addition to the disinfection of drinking water with chlorine. Widely used for bottled drinking water, ozonation is done by introducing ozone gas, which can be introduced at various stages of treatment depending on what you are trying to achieve. Ozone is also widely used to disinfect bottled drinking water because ozone is soluble and effective in killing microorganisms by oxidizing their cell membranes.
How does Ozone water treatment work?
Ozone provides consistent performance and is currently the most commonly used oxidizer and disinfectant for air and water treatment. Because ozone inactivates or quickly kills virtually all bacteria, cysts, and viruses, but leaves no lasting residue, ozone is the disinfectant of choice for most bottled water manufacturers. After the ozone (O 3 ) has done its job in the filtration system, it is converted back into oxygen (O 2 ), resulting in highly oxygenated filter wastewater. Ozone quickly returns to its natural state of O2, so ozonized water can be used for drinking.
Once organic matter attaches to these oxygen molecules, oxidation and ozone formation occurs in the ultrapure fresh water. Some of the released oxygen atoms are converted to ozone, while others recombine to form oxygen. When substances in raw water react with ozone, some of the ozone is depleted, which can result in less ozone being available to treat the targeted pollutants.
In all cases, the concentration of ozone entering the water depends on the amount of ozone present in the air after it has passed through the ozone generator, on the surface presented at the gas-water interface (for example, on the surface of the bubble), and on the contact surface. the time between gas and water. Typically, the water flow rate is kept constant and the amount of ozone in the system is controlled by adjusting the voltage of the current causing the electrical discharge in the generator, or by adjusting the gas flow rate.
Ozone generators produce ozone in grams per hour and are dependent on water flow and water chemistry. The required dose of ozone varies with water quality, but a typical dose of ozone is between 1.0 and 2.0 milligrams per litre, which is sufficient to kill most bacteria and control taste and odour.
In contrast, an ozone water treatment system is a stand-alone unit with no additional components needed to generate oxidation. In situations where a water softener or other water filtration equipment is required, it is best to install a water ozone generator last in line to kill any bacteria that may be lurking in the water lines or other water treatment equipment.
For example, many municipalities with surface waters containing the dangerous Cryptosporidium and Giardia currently use ozone water purification systems as their primary disinfection, as chlorine does not penetrate these protozoa and is therefore ineffective in killing them.
There are over 5,000 installations around the world that use ozone to treat drinking water. We have developed ozone systems for treating small to large industrial or commercial applications. The first drinking water ozone plant was built in Nice, France in 1906. Ozone sparging systems are now common in water storage tanks, and you can smell the ozone around these types of tank spargers.
Ozone offers one of the best options for economical and reliable water treatment. Ozone water generators are a cheaper solution than chlorine, saline or other chemicals and can oxidize and kill almost all bacteria, viruses, and fungi present in the water, much faster and more effectively compared to chlorine and bromine. Ozone is poorly soluble in water and is usually dissolved by a firm that relies on close air/water contact under conditions of very high turbulence, or by a diffuser that breaks the gas into very small bubbles that can remain in contact with the water. a lot of time.
When properly applied at the start of a water treatment process, ozone does not produce halogenated compounds such as trihalomethanes (THMs) that form when chlorine is added to raw water containing humic substances.