Ozone for Sewage Treatment Plants (STP)

Since 25 years, ORAIPL is the trusted global supplier and manufacturer of Ozone Generators and Ozonation Systems, for using Ozone for Sewage Treatment Plants (STP). The US EPA recommends using Ozone technology, as a safer, cleaner alternative over Chlorine and other chemical treatments, for disinfection and treatment in Sewage Treatment Plants (STP).

With water scarcity growing worldwide, and with rapidly increasing population, we require innovative solutions to either cut down the water usage or reuse/recycle the wastewater generated by human activities. There is an urgent need to reduce the forever increasing gap of the supply and demand of potable water. Due to long distance transportation to water scarce localities, the billing charges of freshwater usage takes a heavy toll. Reduction of groundwater extraction will lead to the natural conservation of water resources.

If you want to know how Ozone can improve the efficiency of your STP,
Click here for a FREE Consultation & Quote

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Challenges in Sewage Treatment
  • Reusing Sewage water often leads to the risk of E.Coli contamination.
  • Although, due to the perception of the society wherein it is unacceptable to ‘consume’ sewage water as potable; some level of aesthetics needs to be maintained.
  • Problems of colour, odour, COD (Endocrine Disrupters in Medicines, Shampoos, etc) are often the kind of challenges faced when reusing sewage.
  • Remove pathogens, thus reducing challenges at final disinfection especially Cryptosporidium, which is highly resistant to chlorination.
Common STP Problems
  • A lot of STPs were designed just to comply with the pollution control norms.
  • Majority of factors were neglected while designing these STPs; hence we often come across STPs which are running over capacity and are unable to produce the desired results.
  • With the industrial revolution and advancement in every sector including household items , the household discharge these days are getting even more complex. Ozone can help to oxidize and breakdown these complex pollutants.
  • Typical problems of biological systems failing to give any reduction in COD/BOD etc have become widespread.
  • Majority of the STPs that were built decades ago are not capable enough to comply with revised norms. Hence the delta COD which remains after tertiary treatment has to be treated in some way to meet the required standards. Adding Ozone treatment to an existing STP can improve efficiency multi-fold, and help meet modern pollution standards with ease.
Disadvantages of excess Chlorination in STP
  • The chlorine residual, even at low concentrations, is toxic to aquatic life.
  • All forms of chlorine are highly corrosive and toxic. Thus, storage, shipping, and handling pose safety risks.
  • Chlorine oxidizes organic matter in wastewater, sometimes creating compounds that could be harmful to humans and the environment. (Example: Trihalomethanes (THMs))
  • The level of total dissolved solids is increased in the treated effluent.
  • The chloride content of the wastewater is increased.
  • Certain types of microorganisms have shown resistance to low doses of chlorine.
Advantages of using Ozone in Sewage Treatment Plants (STP)
  • Ozone is more effective than chlorine in destroying viruses and bacteria in STP.
  • The ozonation process utilizes a short contact time (approximately 10 to 30 minutes).
  • There are no harmful residuals that need to be removed after ozonation, because ozone decomposes rapidly into Oxygen (O2).
  • After ozonization, there is no regrowth of microorganisms, except for those protected by the particulates in the wastewater stream.
  • Ozone is generated onsite, and thus, there are fewer safety problems associated with shipping and handling.
  • Ozonation elevates the dissolved oxygen (DO) concentration of the effluent. The increase in DO can eliminate the need for re-aeration and also raise the level of DO in the receiving stream.
  • Ozone can further reduce the COD due to its oxidizing property and help meet the new norms without much changes.
Major Clients
  • Ginger Hotel – 6 gm/hr X 02 No
  • Western Hill Foods Pvt Ltd – 50 gm/hr
  • Vasco Environmental Solutions – Sabrimala Temple – 1 kg/hr
  • Samruddhi Water Works Pvt Ltd – 13 No (20 – 60 gm/hr)
  • MM Enviro Nagpur – 150 gm/hr X 02 No
  • Koradi Thermal Power Station – 600 gm/hr
  • Ingeo Contractors – 150 gm/hr X 03 No

ORAIPL has over 25 years of experience in designing, manufacturing and installing Ozone Generators and Ozone Systems for Sewage Treatment Plants. Many prestigious organizations and Municipal bodies around the world are using our Ozonation Systems for Municipal Water Treatment.

If you want to know how Ozone can improve the efficiency of your Sewage Treatment Plant (STP),
Click here for a FREE Consultation & Quote