You’ll Know You’re Getting Chemical Free Home Water Disinfection When …

Ozone has been used to disinfect water for over 100 years. Many water treatment plants throughout the world not only use ozone to disinfect water, but also remove organic compounds and improve taste and smell. Ozone is an attractive alternative to chemical treatment because it is very effective and does not introduce any new chemicals to the water you use. The drawback has been a high initial cost and equipment maintenance. Advances in technology have brought ozone within the reach of the average home owner, and small scale reliable ozone generating equipment has stood the test of time. Our ozone water treatment (WT) system is simple to operate and monitor to ensure that it is working properly to provide safe water. Here are five routine, simple, and quick checks of your ozone WT system to maintain your peace of mind.

You will know your water’s staying clean when …

1) The desiccant air dryer feels warm.

Put your hand near the top of the air dryer. Does it feel warm? If it is cold, something is not right. The air dryer contains two cylinders of desiccant material. It is the same stuff you find in little packets sometimes placed in the packaging of sensitive electronic equipment. This material absorbs moisture from the air. Eventually it becomes saturated with water and no longer absorbs moisture. The water is removed by heating the desiccant material. The desiccant air dryer is designed to cycle back and forth between two cylinders filled with desiccant material. When air is flowing through one to remove the moisture, the other is being heated to drive off the moisture. If the outside of the box feels warm, this is a good sign that all is well.

2) The moisture indicator is blue.

The moisture indicator provides additional assurance that your ozone equipment is getting dry air. This little viewer contains crystals that change color in the presence of moisture. When it is blue, you can be sure the air feeding your ozone generator is dry. If it is not blue, it could mean that the dryer is not working properly, the crystals have been contaminated in some way, or the crystals need to be replaced. Don’t become alarmed right away. The dryer requires a good six hours of uninterrupted operation to stabilize. If the location is excessively warm or humid, the dryer will not perform well.

If you continue to suspect that the air dryer is not performing as it should after a number of checks over the course of a few days, try to determine what has failed. If the dryer feels warm but the moisture indicator is not blue, it may be that the moisture indicator is contaminated. New moisture indicators are available from our store. It is also possible that the desiccant material has been contaminated or worn out. In that case, you will need one of our desiccant refill kits. If the air dryer feels cold, check the power connections. We also sell replacement heater tubes that contain the desiccant. If you are unable to verify that the air dryer is working, it may be time for a new dryer.

The only part of the treatment system that is active 24/7 is the desiccant air dryer. All the other components wait until the well pump turns on.

3) The little silver ball in the flowmeter jumps up and hovers when the well pump turns on. (Newer models have a digital reading of air flow)

The flowmeter is a simple device telling us how much gas is flowing through the system. Air is pulled through the air dryer and ozone generator by suction produced by the black plastic venturi. Suction is created by the flow of water through the venturi. When the well pump turns on, water rushes through a narrow passage in the venturi. With sufficient flow, the water pressure differential between the input and output of the venturi creates air suction. Air flows through the tubing as it is pulled into the venturi. The little silver ball is lifted by this gas flow giving a visual indication that air is flowing through the system.

If no air flow is created when the water pump turns on, remove the ozone tube connected to the black venturi. Place your finger over the hole to see if suction is created. As long as the pump is running, the venturi should create air suction. If there is no suction, remove the check valve that is threaded directly to the venturi. Clear out any rust or mineral deposits. If the pump stops, water will squirt from this port, so try to open enough faucets to keep the pump running. If you are unsuccessful with getting air suction from the venturi, it could mean that the well pump is not pumping enough water through the venturi to create suction, or the venturi has worn out.

If you do have air suction at the venturi, but still no air flow indicated on your flowmeter, it may be that a check valve needs to be replaced or something else is blocking the flow. The source of blockage needs to be found and cleared before ozone generator will operate. The ozone generator turns on when it senses a sufficient flow of air. Most ozone generators will have a blue light indicating that the ozone generator is running.

4) You can smell ozone from the off-gas vent

But can you be sure that that sufficient ozone is being generated to disinfect your water? When your system is operating properly, left-over ozone that does not get dissolved into the water is vented from the top of your contact tank. If you remove the tubing from the off-gas vent, you should smell ozone when the system is running. It might take a little while for enough ozone gas to build up for venting, but when it accumulates at the top of the tank, it will be vented, often in short spurts.

5) Testing your water for dissolved ozone levels.

Ozone is a more powerful disinfectant than Chlorine. It destroys, inactivates, and prevents growth of bacteria and viruses with very low levels of dissolved ozone in water. As little as .3 ppm dissolved ozone for contact time of 5 minutes provides a 5 log (100,000 bacteria reduced to 1, 99.999% reduction) reduction of most bacteria and viruses. Contaminants are exposed to much higher levels of ozone when it passes through the venturi. By the time the water leaves the contact tank, any contaminants have been in contact with ozone long enough for most of them to be destroyed. The ozone has done its job and very little is left in the water that is distributed to your home. Enough will be left over to prevent growth. As little as 0.01 ppm will prevent growth. These low levels of ozone leaving your contact tank can be measured with our low cost K-7404 dissolved ozone test kit. You don’t want much ozone left in your water. Too much ozone left over in the water can lead to irritating ozone off-gas at the point of use.

Control Dangerous Bacteria in Water with Low Levels of Dissolved Ozone

Legionnaires’ disease is a bacterial pneumonia caused by breathing mist from water containing the bacteria. The bacteria thrive in the warm water found in whirlpool spas, cooling towers, fountains, humidifiers, produce misters, etc. Symptoms of Legionnaires’ disease include high fever, a cough, and sometimes muscle aches and headaches.

The rate of reported cases has increased over 5 fold since 2000, and deadly outbreaks continue today unabated. The reason or reasons behind this increase are unclear at this point, but ozone has proven to be effective at controlling the bacteria in water. Whether the bacteria are flourishing within a 100 gallon fountain or a 1000 ton cooling tower, the engineers at Oxidation Technologies will maintain will provide the precise dose of ozone needed for safe water.

Ozone that is safely dissolved into water has a tremendous disinfectant power and simply turns back into oxygen after expending its energy. As little as 0.01 ppm (1 part ozone to 100 million parts water) prevents the growth of these bacteria. We provide cost effective equipment and long term service to ensure safe and effective use of ozone for bacteria control.

The equipment needed to dissolve low levels of ozone into water can be very cost effective and sustainable for many water systems. A home well-water system uses one of the smallest ozone generators we sell to dissolve enough ozone when the well pump runs to disinfect all the water needed in a typical home. As a general rule of thumb for industrial cooling towers, five grams of ozone per hour is needed for every 100 tons of tower cooling capacity.

The 50 g/h ozone generator needed to supply a 1000 ton cooling tower will also require an oxygen concentrator, venturi, ORP controller, and sometimes a booster pump. The oxygen concentrator and controller comes in a complete package with our OXG systems. The following study conducted by Mazzei reports a one year payback for ozone use due to lower chemical and cleaning costs.

We also provide the convenience of a quarterly preventative maintenance plan to make sure the system continues to perform at peak efficiency and avoid costly repairs due to neglected maintenance. We often work with an independent water company that provides routine testing for the customer to make sure water quality remains good and inform us of any problems.

Check out our website for more information and give us a call with any questions.  Oxidation TechnologiesPhone: 515-635-5854
Toll Free: 844-398-9579
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Mitsubishi Electric to Field Test Ozone Backwashing Energy-Saving Membrane Bioreactor in Singapore

Expected to contribute to global water sustainability

Mitsubishi Electric Corporation announced today that it will conduct a field test of its Ozone Backwashing Energy-Saving Membrane Bioreactor (Eco-MBR) for the recycling of sewage and industrial wastewater with low energy consumption at the Public Utilities Board’s (PUB), Singapore’s national water agency, Changi Water Reclamation Plant (CWRP). The field test is expected to verify that the Eco-MBR, when compared to conventional MBRs, both potentially reduces energy consumption and dramatically increases the quantity of permeated water per membrane filter surface area (flux), thanks to a filter-cleaning process using ozonated water. Mitsubishi Electric is now developing practical applications for sewage, industrial water treatment and recycling systems, which are expected to contribute to global efforts to achieve sustainable water environments.

Building on the technological expertise of more than 1700 delivered ozone generators, Mitsubishi Electric has been developing its high-performance Eco-MBR as a solution for areas around the world that are experiencing increased demand for water. Due to limited water resources in Singapore, the government and industry are successfully applying water-reuse solutions to provide alternative, sustainable supplies of water, especially for industrial use. Currently, Singapore’s supply of potable recycled water (known as NEWater) is sufficient to meet 30 percent of the nation’s water needs. The pilot-scale study will be carried out in cooperation with the PUB and the Centre for Water Research at the National University Singapore until December 2016. Commercialization of the Eco-MBR is scheduled by the year 2018.

Tests so far have shown that the Eco-MBR is able to achieve a high-quantity flux, or quantity of permeated water per membrane surface area, that is more than twice the rate of conventional MBRs*. The key is regularly backwashing the membranes with highly concentrated ozonated water to remove virtually all organic foulants, thereby increasing membrane permeability. In addition, the Eco-MBR lowers energy consumption by using a reduced flow rate for air bubbles that are emitted from a blower to clean the membrane surfaces.

Learn more about ozone for water treatment HERE

New TGOGS series of ozone generators

Toshiba generating ozone for a cleaner future

by ClickGreen staff.

Toshiba is leading the way in harnessing the power of ozone to deliver large-scale water treatment that also benefits the environment.

Ozone is one of nature’s strongest and most effective oxidisers, second only to fluorine. It is used to vital effect on water supplies, bleaching, deodorising, sterilising, and oxidising organic and inorganic matter – without any detrimental effect on the planet.

As such, it is the perfect fit for Toshiba’s corporate philosophy of ‘Smart Community’, as part of which the Japanese multinational aims to create and provide integrated solutions that combine achieving a safe and comfortable society with sound environmental credentials.

Toshiba launched its first ozone generator in 1976 and has remained at the forefront of water treatment technology, developing and operating state-of-the-art equipment on a major scale, and contributing to improving drinking water quality in metropolitan areas including Tokyo and Osaka. The company now boasts the largest market share in the drinking water treatment sector in Japan.

Its latest innovation within this field, the TGOGS series of ozone generators, has been designed for optimum efficiency in a less bulky package. These more compact machines can be customised to the specific needs of customers and are available for drinking water treatment, wastewater treatment or industrial plant treatment.

Ozone generators contain a large number of electric discharge tubes. When oxygen gas or dry air are fed into the machine and a high voltage is applied to the discharge tubes, ozone is created.
Ozone water treatment is a method that is growing in popularity, and Toshiba is at the vanguard in making maximum use of its inherent benefits.

A very reactive gas, ozone is naturally high-performing when it comes to breaking down pollutants, deactivating viruses and microorganisms, to ensure water is safe. Further, it oxidises substances such as sulphur and iron where they occur in water so that they can be easily and effectively filtered out.

And, unlike alternative water disinfectants such as chlorine, using an ozone generator does not produce any odour or residues. As well as removing any potentially harmful bacteria or organic material, the oxidising process using ozone improves the smell, colour and taste of drinking water – meaning that in addition to treating dirty water with dramatic consequences for health, it can offer a significant jump in quality in areas where water is already perfectly safe to drink but not necessarily palatable.

Crucially, ozone’s extremely powerful pollutant-destroying properties have no negative impact on the environment. The gas is quickly converted back into oxygen, leaving no trace after use. It is this unique combination of efficacy and environmental safety that has made ozone generation an integral part of Toshiba’s vision for the future – a vision that is increasingly shared on a global scale.

Ozone helps conserve water

Ozone-On-Demand™ Reduces Water Treatment Cost By 20%

Contact The Supplier


Pinnacle Ozone Solutions’ new generation of smart Ozone-On-Demand (OOD™) generator and control technology can help significantly reduce the cost and complexity of ozone water treatment. By precisely matching ozone production to real-time demand, the North Burleigh Water Treatment Plant (WTP) near Bismarck, North Dakota increased treatment capacity by 64% while simultaneously reducing unitoperating cost by over 20%. The results clearly demonstrate that newer, more efficient ozone generation and controls technologies are ideally suited for small to medium treatment plants, especially those using membranes.

Since its construction in early 2005, the North Burleigh Water Treatment Plant near Bismarck, North Dakota has used ozone in both its pre-treatment and disinfection process steps. Although many treatment plants experience seasonal variations in raw water quality, the conditions at the Burleigh site are especially challenging. Because the plant draws raw water from a series of angle wells drilled beneath the Missouri River, even slight changes in river water level or quality influence the incoming mix of surface and groundwater. Especially challenging are concentrations of dissolved iron (Fe), manganese (Mn), and dissolved organic carbon (DOC) can often reach 5.0 mg/l, 0.8 mg/l, and 3.4 mg/l, respectively, and can fluctuate by more than 30% throughout any give  day.

To improve treatment, the Burleigh plant uses ozone for both pre-treatment and disinfection. However, managing ozone demand and production was a real challenge. To compensate, the plant often ran its older air-based ozone system at 100% capacity and then dosed 10-15 mg/l of sodium bisulfite to prevent damage to the downstream microfiltration – reverse osmosis (MF-RO) membranes. While effective, this process was difficult to manage, inefficient, and costly to operate.