Waste Water Ozone Applications from Faraday.
Applications of ozone in WASTE WATER
• Oxidation of organic waste.
• Cyanide destruction.
• Ground water petrochemical oxidation.
• Heavy metal precipitation.
• Pulp & paper effluents.
• Textile Mill effluents.
• Textile Dye, Starch, FOG (Fate, Oil, Grease) elimination.
• Pesticide, herbicide and insecticide elimination.
• BOD reduction of domestic waste.
• Secondary treatments for municipal waste water.
• Mining heavy metal precipitation.
How ozone helps in waste water treatment ?
1.COLOUR REMOVAL - Surface waters are generally colored by natural organic materials such as humic, fulvic and tannic acids. These compounds result from the decay of vegetative materials and are generally related to condensation products of phenol like compounds; they have conjugated carbon/carbon double bonds. When the series of double bonds extend upwards of twenty, the color absorption shows up in the visible spectrum. Ozone is attracted to break organic double bonds. As more of these double bonds are eliminated, the color disappears. Surface water can usually be decolorized when treated with 2 to 4 ppm of Ozone.
2.REMOVAL OF HEAVY METALS - Ozone oxidizes the transition metals to their higher oxidation state in which they usually form less soluble oxides, easy to separate by filtration. e.g. iron is usually in the ferrous state when it is dissolved in water. With ozone it yields ferric iron, further oxidized in water to Ferric Hydroxide that is very insoluble and precipitates out for filtration. Other metals: Arsenic (in presence of Iron), Cadmium, Chromium, Cobalt, Copper, Lead, Manganese, Nickel, Zinc - can be treated in a similar way. At Ozone levels above 4 ppm however, Manganese will form soluble permanganate, showing up as a pink color.
3. IMPROVED COAGULATION & TURBIDITY REMOVAL - Oxidation of dissolved organic materials by Ozone results in polar and charged molecules that can react with Polyvalent Aluminum or Calcium to form precipitates. Treatment of a surface water with up to 0.5 ppm of Ozone results in a decrease in turbidity, improved settle ability and a reduction in the number of particles. Referred to as pre-ozonation this treatment destabilizes the colloid with a resultant reduction of the amount of coagulant needed to produce a clear filtrate.
4.ALGAE REMOVAL - Ozonation of a water contaminated with Algae oxidizes and floats the Algae to the top of the reservoir. The ozone will also oxidize the metabolic by-products of the Algae and remove the undesirable odor and taste.
Why Ozone is used in waste water treatment ? –
• Powerful disinfectant
• No residual (compared to chlorine)
• Stronger oxidant (compared chlorine/UV)
Waste Water Treatment Hospital Wastewater Treatment Ozone can be utilized to treat wastewater generated from hospitals and the medical community. Due to the superior oxidation properties of ozone over conventional treatments and our CD OZONE's high ozone concentration at over 6% by weight, we can (and have) gone after these complex waste streams with very good results. If you have a specific problem you are trying to resolve, please contact us with more details and see how ozone may be employed for your case.
Conclusion:
Waste Water Treatment Ozone is effective against a large variety of water treatment problems. In general, the more problems in the water to be treated with ozone, the less an ozonation system costs when compared to other traditional treatment methods. When comparing the ECONOMIES cost of an ozonation system with other treatment systems there are some key factors to consider; here are a few:
• There is no need to purchase, ship or store chemical oxidants or disinfectants
• There is no labor for handling.
• Many health and safety concerns are reduced or eliminated.
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