Ozone treatment for municipal drinking water: a rapid and efficient process
To meet the latest water quality standards, advanced ozone treatment of drinking water is applied as primary disinfectant prior to distribtion.
How does ozone treatment work in a municipal water plant?
Ozone has been used in drinking water treatment facilities for over a century due to its ability to eliminate bacteria and viruses such as Giardia lamblia and Cryptosporidium parvum.
Compared to other oxidizing substances like hydrogen peroxide, chlorine, and bromine, ozone has a much higher redox potential (2.07 V). This is due to ozone’s instability and high reactivity.
In addition to ozone as an excellent disinfectant to neutralize waterbourne virus and bacteria, it is also an excellent solution for preventing biological clogging of ion-exchanging resin and reverse osmosis membranes, but it is also recommended because some diaphragms and resins are chlorine-degradable.
You can install ozone water treatment systems either before or after the filtration system. Ozone and water can be applied in two different methods:
Ozone treatment for drinking water: an efficient technology
Ozone is typically more effective at treating water than chlorine because it requires less contact time. However, the precise dosing and contact time depends on the specific application. Ozone dissolves more readily in lower water temperatures, which increases the effectiveness of the process.
Ozone is effective in a wide range of pH values, but a slight increase in the pH above 7 will increase the efficacy of the treatment. The amount of water contaminants also affects the amount of ozone required in the process. Some of the ozone is consumed when it interacts with the microorganisms in untreated water. As a result, there is less ozone available to oxidize other target substances in the water.
Ozone treatment for wastewater
Ozone is now a popular option for wastewater treatment due to stricter environmental regulations.
Ozone is a potent oxidant and can remove pharmaceutical and personal care products (PPSP) as well as contaminants of emerging concern (CEC) in a way that current biological processing techniques cannot.