What is Ozone

  • ozone is tri-atomic form of oxygen which is generated by passing dry air or oxygen which is fed through an electrical discharge created between two electrodes.
  • these electrodes are seperated by the discharge gap & a single dielectric.
The discharge, known as “corona discharge”, causes the dissociation of some of the oxygen molecules resulting in the formation of ozone.

Odour in STP
Most of the new sewage treatment plants (STPs) are built in Building Basement area. The whole facility will be enclosed in a single building. The STP system is a combination of: Pre-treatment,primarytreatment,secondary(biological)treatment & tertiarytreatment.

So why Smell:
There is a wide spectrum of possible inorganic and organic molecules, which can create unpleasant Odours. The most common are hydrogen suphide, ammonia, sulphur compounds, mercaptans, amines, aldehydes, ketones etc.

Hydrogen Sulphide and Ammonia are two main parameters restricted by regulations. The concentration of H2S found in the exhaust air of Sewage Treatment Plant is in the range of 5 - 15 ppm. Threshold limit of H2S = 0.002 - 0.15 ppm The emission level for ammonia is typical in the range of 50 to 150 ppm. Threshold Limit For NH3 is = 5 ppm

Here Aqozone De Odour Ozone is dosed into the ducts of the STP chamber either carrying the fresh air or the exhaust air depending on the requirement of the customer. Our engineers visit the site and understand the layout conditions and submit the observations like area and the specification of the blowers used to our design team. A separate In house design team makes the calculations of the Ozone dosage required based on the specifications of the blower installed.

The engineers then inject the Ozone into the ducts precisely and ensure the odour is reduced by 90% and also killing the virus, bacteria’s in the air of the exhaust or inside the STP room.

Advantages of Aqozone De Odour Ozone system:

  • Very rigid and easy to handle.
  • Low maintenance.
  • No recurring expense (only little power).
  • Completely automatic

Ozone for STP/ ETP treated water:

Waste water treatment is a need of the hour and water has to be reused either for flushing or the gardening.
The waste water after being treated by technologies like ASP, SBR, MBBR, DEEWATS etc has a color and a smell in the final treated water even after the chlorine dosage.

The above picture depicts the water after treatment before Ozone and After Ozone. From the left hand side the picture it is evident that the water has color and odor after the tertiary treatment. After the Aqozone Ozone Waste Water treatment of the final water the water becomes colorless and odourfree.

Advantages of Using Aqozone Ozone Waste Water System in STP Treated Water:

  • COD and BOD reduction significantly.
  • Meeting the regulatory standards
  • The water after treatment remains clear even after a week.
  • No chemicals are added.
  • The dissolved oxygen is increased after ozonation.
  • No requirement of fresh water being mixed in the final treated water to reduce the color.
  • Complete water disinfection from bacteria’s like E-Coli or Salmonella.
The picture is the Aqozone Ozone Waste Water system used for the colour removal and is designed basically upon Flow rate of the treated water. COD and BOD after sand filter or the Active Carbon Filter. Final water usage by the client/ customer