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Disadvantages to Ozone
1. There are higher equipment and operational costs and it may be more difficult to find professional proficient in ozone treatment and system maintenance.
2. Ozonation provides no germicidal or disinfection residual to inhibit or prevent regrowth.
3. Ozonation by-products are still being evaluated and it is possible that some by-products by be carcinogenic. These may include brominated by-products, aldehydes, ketones, and carboxylic acids. This is one reason that the post-filtration system may include an activate carbon filter.
4.The system may require pretreatment for hardness reduction or the additional of polyphosphate to prevent the formation of carbonate scale.
5.Ozone is less soluble in water, compared to chlorine, and, therefore, special mixing techniques are needed.
6.Potential fire hazards and toxicity issues associated with ozone generation.
Primary Advantages to Ozone
1. Ozone is effect over a wide pH range and rapidly reacts with bacteria, viruses, and protozoans and has stronger germicidal properties then chlorination. Has a very strong oxidizing power with a short reaction time.
2.The treatment process does not add chemicals to the water.
3. Ozone can eliminate a wide variety of inorganic, organic and microbiological problems and taste and odor problems. The microbiological agents include bacteria, viruses, and protozoans (such as Giardia and Cryptosporidium).
chlorine is very suitable for the deactivation of bacteria and viruses, it cannot be used to deactivate protozoa
1) Ozone is over times faster to purify water.
2) Unlike chlorine, ozone leaves no harmful chlorinated by-products in the water, ozone quickly reverts back to pure oxygen if unused.
3) Chemical water treatment leaves long-term chemical effects on the environment, some of which are negative. Ozone does not.
4) Ozone is the strongest, fastest, commercially available disinfectant and oxidant for water treatment.
5) Ozone oxidation reactions take place several thousand times faster than those of chlorine for destruction of bacteria, viruses, yeast, molds, cysts, mildew, and most other organic and inorganic contaminants.
6) Ozone in appropriate doses can treat all water borne pathogens, while chlorine cannot (given practical, safe doses.)
7) Ozone is generated on site and does not require storage.
8) You cannot over-dose with ozone as unused ozone escapes out of the water and reverts to oxygen.
9) Ozone disinfection qualities are not dependent on pH, nor does the addition of ozone affect the pH of water.
) Ozone oxidizes and destroys oils and other contaminants in water.
) Ozone can significantly reduce levels of harsh chemicals such as chlorine and their by-products.
) Ozone acts as a micro-flocculent, aiding in the removal of minerals such as iron and manganese.
) Ozone leaves no unpleasant chemical taste or smell.
) Ozone dissolved in water will not irritate skin, nose, or ears, nor will it dry out or leave a chemical film on skin.
) Ozone's effectiveness can be measured with a simple ORP meter.
) Ozone is less corrosive than chlorine in water.
Ozone is Environmentaly freinds mor than Chlorine.
Chlorine is expensive than Ozone
Ozone is a very powerful disinfectant than chlorine
This comparison will show the difference between both of them.
ACTION IN WATER CHLORINE OZONE
Oxidation Potential (Volts)1. 2.
Disinfection:
Bacteria ModerateExcellent
Viruses Moderate Excellent
Environmentally FriendlyNoYes
Color RemovalGoodExcellent
Carcinogen FormationLikelyUnlikely
Organics OxidationModerateHigh
Micro flocculationNoneModerate
pH EffectVariableLowers
Water Half-Life2-3 hours min.
Operation Hazards:
Skin Toxicity HighModerate
Inhalation ToxicityHighHigh
ComplexityLow High
Capital CostLow High
Monthly Use Cost Moderate-High Low
Air Pre-treatment None Filer and dehumidify air
