44 Klooflands Road,                              Cell  (+27) 83 625 0276
P.O. Box 613, Kloof, 3640                     
Durban, Kwazulu Natal, South Africa   Tel/Voip: 087 654 7348

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Ozonation for Hydroponics and Greenhouse

Ozone, Green Houses and Hydroponics

 Application of Ozone to Waste Water Recovery and Disinfection

 We have full-scale wastewater recovery systems for greenhouses. In such applications, our ozonation systems are used for the complete elimination of bacteria, viruses, fungi, spores and parasites, as well as for the removal of organic waste. The ozonated water contains increased levels of oxygen that is desirable for the prevention of anaerobic pathogen growth on plant roots. 

ECO-TEC will utilize your existing equipment (such as aeration tanks, pumps, filters and buildings), to be fitted for the new purpose, or design a brand new system. The water treatment systems are engineered for fully automatic and worry-free operation.

 The wastewater recovery system can incorporates two storage tanks, The ozone controller will treat one tank that is being supplied with the water returning from the greenhouse. The second tank serves as the recycled water supply. Typically, 50% of the plant food is recovered. When the treatment of the first tank is completed, water is left to sit for a few hours until all residual ozone is reduced to oxygen. Then the tanks are switched automatically. The second tank now collects and treats water from the greenhouse while the first tank supplies water to the plants. All of the wastewater is recovered; there is no discharge of any kind. The water savings range between 20% to 90% depending on the greenhouse operation and the season.

 Complete systems for makeup water treatments are also available, engineered to fit any size of operation. The slightest amounts of iron, manganese, bacteria, organics or other oxidizable materials will plug the capillaries in the hydroponic water distribution.

Chlorination is not an option because it forms very toxic chloro-organic compounds known as THMs. De-chlorination is not completely effective for removing the THMs, and subsequent discharge into the soil would ultimately lead to contamination of the ground water. In recirculation systems, the THMs would accumulate and poison the plants.

Our systems for makeup water are totally non-toxic and the only by-product created is oxygen.

Based on your water analysis, ECO-TEC will propose the proper ozonation system size including the filters, contact tanks and biofiltration, if necessary, applying only the most economical and reliable solution to the water problem.


 1. All water is recycled; sewer/dumping charges are virtually eliminated. Only in the case of elevated salt content due to extensive evaporation, a blow down may be required, usually only after many months of operation.

2. Up to 50% of otherwise lost nutrition is recovered and returned back to the feed operation system.

 3. All fungi, viruses, bacteria and parasites are eliminated.

 4. The makeup water demand is greatly reduced.


 Water Purification or Hydroponics

Suggested example for Recirculating System Layout


 The simplest effective system can have the tank or reservoir with an ozone unit with a recirculating pump and a Venturi for injection


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