AZCO equipment is in use by many full-scale, wastewater treatment systems for water recovery. Our systems are utilized in fish hatcheries and farms, domestic, municipal and commercial sewer systems, as well as food processing waste treatment and industrial toxic waste treatment. In these applications ozonation systems provide a wide range of support ranging from just a reduction of biological waste, to complete purification and sanitation as required by the drinking water quality standards. Such safe to drink water is often used for irrigation in farming and parks, or in secondary plumbing for flushing toilets.

This technology offers gold mine opportunities in many desert states, where water sometimes costs more than oil. Instead of facing problems how and where to discharge the wastewater, millions of cubic meters of water can turn large areas of desert into a green paradise. The sludge is also disinfected, and in most cases suitable as a natural fertilizer.

While ozone is superior and the most natural agent for sanitation and water purification, it is not a miracle cure. For economical benefit, ozone must be applied in conjunction with a chain of other clean and environment-friendly techniques:

  • Rotating screens for flows from 18 m3/h to 460 m3/h (80 gal/min to 2,025 gal/min) with 15 micron to 100 micron screens. About 1% of the main flow is charged with ozone for continued backwash. The water for the backwash does not require any chemicals, and it does not have to be heated.
  • DAF cells are suitable for the aeration of wastewater with very high organic content. In this process ozone oxidizes the surface of the tiny organic particles, creating tiny bubbles of carbon dioxide. Nitrogen gas from air provides further lift to the particles. Skimmers remove the resulting foam.
  • Foam Fractionators work similarly to DAF cells, except that they do not need mechanical skimmers. The foam overflows to a special compartment where it is removed by high-pressure mist. Ozone is injected into the incoming water line.
  • Flocculators use ozone to create flocs from otherwise dissolved organics. A sand filter with automatic backwash further removes these flocs.
  • Bio-filters need ozone-treated water devoid of pathogens; otherwise the pathogens may decimate the colonies of aerobic, water-cleaning bacteria.
  • The effluent water from bio-filtration is further purified with ozone for final purification and sanitation.
  • In more elaborate industrial wastewater treatment systems ozone is applied in a PH-LOW tank followed by filtration, then in a PH-HIGH treatment followed by filtration, and further followed by a high ozone level treatment assisted with hydrogen peroxide and/or UV radiation (PEROZONE).
  • Ozone also helps in oil separation and sedimentation.
  • Aerobic and anaerobic digesters are suitable for pre-treatment, to be followed by ozonation.
  • The ozonation of large lagoons provides a much more efficient bio-treatment, and usually includes a final disinfection stage utilizing ozone.
In most cases, not all of the techniques above need to be implemented at the same time. For the selection of proper technologies, many aspects must be evaluated, including:

  • Water flow
  • Wastewater content based on laboratory test results
  • Space available, and the cost of the space
  • Target water quality anywhere between merely some reduction of BOD (Biological Oxygen Demand) to compliance with the bottled water quality standards.
  • Penalties for the discharge of water with BOD above allowable limits.
  • Cost of regional water and estimated value of the recycled water.


AZCO is equipped to provide a wastewater treatment solution which meets all your requirements in the most economical way. For this purpose please answer the attached questionnaire to the best of your knowledge.