Clean Dry Air

Water content needs to be nearly zero for ozone generator feed gas.

Long term, reliable operation of an ozone system depends largely on clean, dry air. Unless you have liquid oxygen (LOX) as an oxygen source, your ozone will be generated from the oxygen found in ambient air. The air around us contains dust particles, and lots of water vapor. One cubic meter of air on a hot humid day can contain up to 30 grams of water. Even a gram of water vapor in a cubic meter of air (dew point -5 deg. F) will inevitably lead to failure of the ozone generating equipment. We need to get another 9/10 of a gram of water out to keep an ozone generator in good shape.

Water content in air is most commonly measured in terms of dew point. Dew point is the temperature at which water vapor condenses into liquid. When a mass of air cools down to very cold temperatures before water condenses, it indicates that there is not much water vapor in the air. The graph shows that dew point is not linear in relation to the amount of water vapor in the air. It is easy to see that the water content gets close to zero at about -50 degrees F. Large ozone systems operate with feed gas between -100 and -60.

An air filter and desiccant air dryer is often used to clean and dry the air for a small air-fed ozone system. The desiccant material absorbs moisture from the air as it passes through. When the desiccant becomes saturated, air flow is switched to a second chamber of desiccant material while heat is applied to the first to drive the water from the material in the first chamber. The processes switches back and forth, effectively dries the air to a dewpoint of -40 deg F. This is a cost effective level of dryness for small ozone systems.

Ozone systems that use an oxygen concentrator are able to take even more water out of the feed gas. The first line of defense will be the air filter for the air coming into the air compressor used for your ozone system. This filter will remove particles of dust that eventually wear out the compressor as well. The compression process also serves to remove much of the water when the hot compressed air cools forming water droplets that can be removed with a coalescing filter. A compressor with a means to cool the compressed air can bring the dew point from 60 to 40 degrees. This compressed air is forced through the zeolite sieve beds of and oxygen concentrator. The zeolite quickly absorbs the Nitrogen and remaining water vapor. As the oxygen concentrator cycles, the Nitrogen and water vapor is exhausted, leaving 93% oxygen with a dew point from -60 to -100 degrees F.  The oxygen concentrator works well as long as water vapor does not build up or condense in the sieve beds. They will not work well when the compressed air has a dew point above 40 degrees or the sieve material absorbs moisture during down time.

Oxidation Technologies provides sales, service, and system design of gas preparation equipment for ozone systems.  

Aeroqual S-200 Ozone Monitor

Video unboxing and showing the accessories that are shipped with the Aeroqual S-200 Ozone Monitor.

The Series 200 is a user-friendly gas detector base that pairs with multiple ozone range sensors and is small enough to be easily transported in a carrying case.

Included in the box is the Series 200 gas detector base, which receives sensor heads with several different ranges of ozone. These are the ozone ranges that the sensor heads will detect: 0-.05 ppm, 0-.15 ppm, 0-0.5 ppm, and 0-10.0 ppm. The sensor head is shipped in a separate box. Also included in the S-200 monitor base box is the power cord and a sheet of information on where to find the user guide online.

The S200 monitor base is shipped with the battery inside it, but the battery cord is not actually plugged in to the base. Remove the back of the monitor, pull out the battery, and plug the cord tip into the port inside the back of the monitor base. Replace the battery as well as the S-200 backing. The base is now ready to be plugged into a wall outlet for charging the battery.

The Series 200 detector’s small size and 24-hour battery life make it an ideal device to take along on job sites. When paired with this specially designed carrying case, the Series 200 monitor offers a convenient and transportable ozone detection solution.

Purchase Series 200 monitor base HERE

Aeroqual Series-200

Reduce Lift Station and Vent Odor Problems with Ozone

Lift station using ozone for pre-treatment and odor control

Ozone injected directly into the sewer pipe in the lift station controls vent odor problems, reduces monthly chemical costs, and pre-treats sewage coming into the treatment plant. I recently visited one of our sites using ozone for lift station and vent odor control, and then spent some time doing research to learn more about this application. The first thing I began to realize is how complex water and sewage treatment is. Treatment operators face a multitude of variables and different products and approaches to cleaning up water. A successful solution depends on a careful study of the particular situation and close observation of results. Solutions to problems in a particular situation  often require a combination of approaches. The bottom line is cost, safety, effectiveness, and environmental impact.

The following are a couple of examples of ozone use for odor reduction in wastewater applications:

Easy To Digest: H2S Removal Rids City Of Lift Station Odors” By Richard Wiseman, Street & Sewer Superintendent, City of Taylorville  published in

Application of Ozone and Oxygen to Reduce Chemical Oxygen Demand and Hydrogen Sulfide from a Recovered Paper Processing Plant”  by Patricia A. Terry  Research Article  International Journal of Chemical Engineering  Volume 2010, Article ID 250235, 6 pages

Oxidation Technologies specializes in integrating ozone into existing systems. We also offer custom built rental equipment for pilot tests to help determine if ozone a good fit for your situation.

At the particular site I visited, sewage is being pumped over 15 miles. Without treatment, hydrogen sulfide gas is generated from the anaerobic conditions within the pipe. Gasses are vented at various points along the pipe often leading to odor problems. The idea is to provide the pipeline with sufficient oxygen to prevent anaerobic activity. Currently this site is using a combination of Bioxide and ozone to control odor problems. Bioxide is a calcium nitrate based liquid formula which creates a thriving environment for bacteria that remove dissolved hydrogen sulfide and prevents its formation.  The liquid solution is metered into the sewage main at rates from 1 to 8 gallons per hour depending on sewage flow rates and ozone use. Ozone gas also provides oxygen needed by the aerobic bacteria helping to break down the sewage. Ozone destroys the odor causing bacteria, breaks down odors and organic material as ozone releases its energy and transforms back to oxygen. Both ozone and Bioxide provide chemical free solution with minimal residual byproducts.

Ozone comes with a higher startup cost due to the ozone generating equipment investment, but lower long term costs. Proper application and integration reduces the need for other treatment costs. A combination of treatment options is often needed to address the complexities of water treatment and variations in treatment demand throughout a year. Oxidation Technologies will custom design a system to fit your specific needs and provide routine maintenance to keep it running effectively.

Ozone use in Poultry Processing

TUCKER, Ga. – New research has demonstrated how an innovative packaging technology can extend shelf life and improve the safety of poultry products. The USPOULTRY Foundation funded project was conducted in Athens, Georgia, at a US Dept. of Agriculture Agricultural Research Service (ARS) facility and concluded that atmospheric cold plasma (CP)-based antimicrobial packaging technology can be used to increase shelf life and decrease pathogens in raw poultry breast meat. Dr. Hong Zhuang, research food technologist with the ARS Quality and Safety Assessment Research Unit, discovered a packaging system that utilizes electrical current to create ozone in sealed poultry packages, which results in decreased spoilage and pathogens in the products.

Read Full article HERE

Packaged chicken

The CP-based system is an alternative to traditional, non-thermal antimicrobial interventions, which include water-chilling poultry in a chlorinated solution and maintaining safe temperatures during the processing and storage of the products.

According to the USPOULTRY summary of the findings: “There are a number of advantages with this packaging system compared to alternative treatments, such as eliminating pre-packaging treatment requirements, adaptability for use with any size and type of package and treatment time, having no chemical residues after treatment, and cost effectiveness.”

The research summary quantifies the effectiveness of the technology, which found across-the-board reduction in spoilage-causing microbes in chicken breasts packed in air, including: Campylobacter (reduced by more than 90 percent) and Salmonella (by 60 percent). Similar reductions in Campylobacter were found in breast meat packed in oxygen and carbon dioxide atmospheres but there were no reductions in Salmonella levels. The appearance of ozone-enhanced products was affected, as the product color was reported to be lighter or paler after storage while changes in pH and drip loss were not significant.    

Achieving optimum results using the CP technology requires 60 kilovolts for 60 seconds and the ideal packaging atmosphere is 35 percent oxygen, 60 percent carbon dioxide and 5 percent nitrogen.

The research summary concludes: “The expected reduction is more than 90 percent in spoilage microbes and Campylobacter and 60 percent in Salmonella after five days of storage at refrigerated temperature.

Looking for an ozone system for poultry or food processing? Follow link below for information on what we can offer: