Industrial Applications

Ozone: The Sustainable Solution for Cooling Towers, Process Water and Wastewater.

Bacteria, viruses and other pathogens thrive in the water around us. These microbes can cause illness or can negatively affect the process where the water is being utilized. Traditionally we attack these pathogens with chemical biocides. Ozone technology is a new alternative — safer, greener and more effective.

Truly Sustainable

Ozone is very inexpensive to produce, is sustainable and has an unlimited supply source, the oxygen found in air. Ozone is clean and environment-friendly; its only by-product is oxygen. And, because ozone is produced on site, you eliminate the transporting, storing and handling of hazardous materials.

Faster and more powerful than chlorine

Ozone has a killing factor against bacteria and viruses 3,100 times faster than chlorine. Ozone has the oxidizing strength to kill hardened microbes that can survive a chlorine assault. For example, Cyptosporidium parvum is one of the most resilient water-borne pathogens. Studies have shown that after 18 minutes, the bacteria were still alive in water containing 350,000 ppm chlorine. A residual of 700,000 ppm of chlorine is needed to kill the cysts instantly. The same study proved that only 1 ppm of ozone was effective in instantly killing the same Cryptosporidium cysts.

Ozone for Cooling Towers

RS Automation Ozone systems will improve the treatment and safety of your cooling towers. A powerful disinfectant, ozone can be used to treat recirculating systems of all sizes. It is effective at preventing biofilm growth, corrosion and controlling scale deposits. Because ozone is a powerful biocide, it can be used to provide protection against pathogens like the Legionella Pneumophilla virus that is often traced to contaminated cooling water systems.

Cooling Tower Benefits

Eliminates most types of microorganisms
Removes existing biofilms
Saves energy
Saves water – allows higher cycles of concentration
Generated on site – no storage or handling of chemicals
Low operational and maintenance costs
Replaces toxic biocides

Ozone for Process Water

High Quality Products Demand High Quality Water. Beverage processing plants have a high standard on the water used in their process, mandating that the water be bacteria free (zero count). Any chemical additives used to destroy bacteria must be completely removed prior to use as process water as residuals, such as chlorine or ozone, would compromise the flavor of the beverage.

The process is “green” as only oxygen is discharged to the environment.

Our Technical Specialists will work with your team to implement joint process improvements that will optimize operating efficiency, save on operating costs and have a minimal impact on the environment.

Ozone in Wastewater Applications

As the amount of chemical pollutants in our wastewater increases, facility operators are struggling to find solutions. With the recent enactment of the newest Disinfection By Product Rule (DBPR) regulations, that solution has become even more difficult. Ozone is a powerful disinfectant and Rochester Midland Corporation Ozone Systems can improve the BOD/COD discharge levels in your wastewater.

Wastewater Benefits

Lowers BOD/COD levels prior to discharge
No chemical residual in water
Reduces residual odor/taste in water stream
Precipitates suspended solids
Generated on site – no storage or handling of chemicals
Rapidly kills microorganisms with minimal contact times
Exceeds EPA standards for reducing THMs (trihalomethane) and HAAs (haloaceticacid) levels
Replaces hazardous chemicals

Ozone Drinking Water

Ozone has been used in drinking water plants since 1906 where the first industrial ozonation plant was built in Nice, France. Ozone as a viable process train is gaining more importance as the sources of pristine raw water are dwindling. Source waters from aquifers have to be replaced with surface waters. Without exception, these surface waters are contaminated with a varying degree of naturally-occurring dissolved organics, synthetic chemicals, and often naturally-occurring metals – sulfides, nitrites, and arsenic.

The most popular application of ozone in water treatment today is found in drinking water applications. The largest ozonation systems have been built for municipalities treating surface waters. In certain instances, ground water as a raw water source has also been ozonated. Applications with ozone which recycle the water are swimming pools and cooling towers. The challenge is to minimize in a recycle environment the amount of makeup water and continuous disinfection.

In water treatment applications with ozone which require ozone gas concentrations between 7 and 15 percent, oxygen is used as feed gas. Also, ozone dosages of up to 100 ppm are common. The industries utilizing high concentrations and large ozone dosages can be found in the industrial wastewater treatment arena, and also in the treatment of landfill leachate. Ozone as a bleaching agent has been accepted in the pulp and paper industry.

The U.S. Food and Drug Administration has accepted ozone as being safe; and it is applied as an anti-microbiological agent for the treatment, storage, and processing of foods. How powerful ozone exhibits disinfection properties can be seen by comparing the 3-log inactivation efficiency of giardia cysts with chlorine. The EPA has established guidelines for the CT values. Assuming a pH of the raw water of 7 and a water temperature of 15oC, a free chlorine residual of 1 ppm would require a CT value of 75. Treating the same water with ozone at 1 ppm would require a CT value of .95. The cost to build these structures for a large retention time will make a significant contribution to the overall capital outlay of the water treatment plant. There is also some serious concern whether chlorine at all will be able to disinfect cryptosporidium. Cryptosporidium will not be a disinfection barrier for ozone.

Oxidation of metals such as iron and manganese is quick and efficient over a wide pH range. Iron in the ferrous state will be rapidly oxidized by ozone to the ferric state whereby gelatinous ferric hydroxide will precipitate. Soluble manganate occurs in the divalent form and will be oxidized by ozone to the tetravalent form also very rapidly. Tetravalent manganese hydrolyzes, and it will produce insoluble manganese oxydehydroxide which can be precipitated over a filter bed.

A word of caution: Over-ozonation will oxidize the tetravalent manganese to soluble permanganate which will give the water a purple color. The permanganate, however, can be reduced to the tetravalent manganese by running the water through a carbon filter.

Nitrite ions can be oxidized with ozone also very rapidly, forming nitrate ions which are stable and soluble.

Hydrogen sulfide which can give the water a foul odor (rotten egg) can quickly be oxidized by ozone in various stages, the last stage being the sulfate ion. Sulfates are innocuous and, in many cases, can be filtered. Another important oxidation with ozone is for arsenic. However, it is important that the raw water contains magnesium or calcium cations. In the presence of these ions, ozone will produce insoluble magnesium and/or calcium ortho-arsenates which will precipitate.

In general, ozonation can be accompanied by and made part of the process through microflocculation. This is the phenomenon by which organic material, when partially oxidized, becomes more polar. Since the raw water always contains polyvalent cations, like calcium, magnesium, iron, aluminum, and manganese, these organic polar groupings combine with the polyvalent cations. Complex materials are being formed which are insoluble and can readily be filtered.

Turbidity will also be affected by ozonation. By definition, turbidity forms through the suspension of microscopic particles or colloidal particles which can be organic or inorganic in nature. These particles often have the same electrical charge – namely being positive. Ozone has a negative charge, and upon reaction, the particles are neutralized and will precipitate.

In summary, when the ozonation process train is properly engineered and designed, water quality can be achieved which, without exception, cannot be matched with any type of chemical treatment.

Equipment

Cart Mounted Corona Discharge Ozone Wash System

RS Automation’s family of cart-mounted ozone generators are fully-integrated systems that provide ozone output ranges from 10 to 20 grams per hour and can handle the toughest water treatment applications. Ozone is the most powerful oxidizer commercially available, up to 1.5 times stronger and many times faster acting than chlorine, and is unmatched as a disinfectant. Unlike traditional antiseptics, ozone is produced on-site with equipment that can easily be sized to meet any requirement. Ozone-enriched water (OEW) not only sanitizes surfaces on contact but is completely safe. Ozone also leaves no harmful residue in water to harm the environment. Designed and engineered as complete turnkey solutions the cart-mounted systems come pre-wired, pre-plumbed and mounted on a portable stainless steel or plastic cart ready for use in your spray down application.

Features

• Turnkey & pre-plumbed
• Built-in air preparation
• Ozone injection system
• Recirculation loop
• Back flow prevention
• Saves time – Disinfectant produced on-site (no storage, mixing or handling of chemicals)
• Protects the Environment – Ozone reduces waste water pollutants

Benefits

• Better Sanitation – Disinfection on contact
• Eliminates odors – Powerful, but safe, oxidation
• Saves money – Reduces or eliminates chemical use.

Applications

• Surface wash down
• Produce washing
• Produce processing
• Beef and Pork processing
• Poultry processing
• CIP

Tote Mounted Corona Discharge Ozone Batch System

RS Automation’s family of tote-mounted ozone generators are fully-integrated systems that provide ozone output ranges from 10 to 60 grams per hour and can handle the toughest water treatment applications. Ozone is the most powerful oxidizer commercially available, up to 1.5 times stronger and many times faster acting than chlorine, and is unmatched as a disinfectant. Unlike traditional antiseptics, ozone is produced on-site with equipment that can easily be sized to meet any requirement. Ozone-enriched water (OEW) not only sanitizes surfaces on contact but is completely safe. Ozone also leaves no harmful residue in water to harm the environment. Designed and engineered as complete turnkey solutions the tote-mounted systems come pre-wired, pre-plumbed and mounted on a portable tote ready for use in your water treatment or wash down application.

Features

• Turnkey & pre-plumbed
• Built-in air preparation
• Ozone injection system
• Recirculation loop
• Back flow prevention
• Saves time – Disinfectant produced on-site (no storage, mixing or handling of chemicals)
• Protects the Environment – Ozone reduces waste water pollutants

Benefits

• Better Sanitation – Disinfection on contact
• Eliminates odors – Powerful, but safe, oxidation
• Saves money – Reduces or eliminates chemical use.

Applications

• Batch treatment of waste water
• Portable ozone spray wash reservoir
• BOD and COD removal

Wall Mounted Corona Discharge Ozone Wash System

RS Automation’s family of wall-mounted ozone generators are fully-integrated systems that provide ozone output ranges from 10 to 60 grams per hour and can handle the toughest water treatment applications. Ozone is the most powerful oxidizer commercially available, up to 1.5 times stronger and many times faster acting than chlorine, and is unmatched as a disinfectant. Unlike traditional antiseptics, ozone is produced on-site with equipment that can easily be sized to meet any requirement. Ozone-enriched water (OEW) not only sanitizes surfaces on contact but is completely safe. Ozone also leaves no harmful residue in water to harm the environment. Designed and engineered as complete turnkey solutions these systems come pre-wired, pre-plumbed and ready for mounting.

Features

• Turnkey & pre-plumbed
• Built-in air preparation
• Ozone leak detection system
• Protects the Environment – Ozone reduces waste water pollutants

Benefits

• Better Sanitation – Disinfection on contact
• Eliminates odors – Powerful, but safe, oxidation
• Saves money – Reduces or eliminates chemical use.
• Saves time – Disinfectant produced on-site (no storage, mixing or handling of chemicals)

Applications

• Cooling towers
• Large residential pools
• Residential well water
• Commercial pools
• Bottled water
• Small community drinking water
• Agriculture
• Commercial aquariums

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