4 Advice to Choose a ozone monitoring equipment

Sizing an ozone generator can be made simple with the right information. However, obtaining said information can sometimes be problematic.

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'When selecting and sizing an ozone generator for your application, there are three important points to consider for effective results'

When selecting and sizing an ozone generator for your application, there are three important points to consider for effective results:

1. Ozone demand (g/m3, mg/l, ppm, etc.): The most important information when selecting an ozone generator for your project or application is an ozone demand, or how much ozone per volume of water or air you need to apply to remedy an existing problem, which is typically the inactivation of harmful or dangerous bacteria or contaminants. You can determine ozone demand through various means, including:
   • Published Scientific Studies
   • CT (Concentration Time) Factor Tables for Bacteria Deactivation
   • Experience or Pilot Testing
   • Government Regulations
2. Volume: The amount of water, air, gas, etc., that you need to treat (m3/h, GPM, SLPM, etc.).
3. Compensation: Implementing proper compensation is crucial to account for factors limiting ozone participation in the reaction. This compensation considers the efficiency of the ozone dissolution process, ozone concentration, and ozone decay half-life.

Once you know the ozone demand, you multiply it by the gas, water, etc. volume you need to treat. This will give you the theoretical amount of ozone required for your project in an ideal situation.

Implementing proper compensation for all contributing factors that limit ozone participation in the reaction factors about ozone production will allow you not to undersize the ozone system and achieve greater treatment results.

'To help you better understand how you can do the calculations, let us review the following practical example for swimming pool ozone application'

To help you better understand how you can do the calculations, let us review the following practical example for swimming pool ozone application.

• Ozone demand:
  To prevent any bacteria, algae or viruses from growing in the pool and to keep water safe and crystal clear, especially with organic dust and pollen entering the water in outdoor applications, you need to have a theoretical residual ozone concentration of 0.07 ppm, as we have learned from our experience over many years. An indoor pool will most likely work well with 0.04 ppm of residual ozone as indoors, you do not have organic dust, pollen, etc., blown into a pool by wind, dramatically increasing bio load and ozone demand. Some government recommendations suggest 0.03 ' 0.05 residual ozone concentration, but I would never go as low as 0.03. CT factor for most bacteria diction is about 0.02 ppm/min
• Calculation:
  For a 50 m3 example swimming pool, To create 0.07 ppm ozone concentration (outdoor pool) in ice-cold water, you need to dissolve 0.07 g/m3(ppm) x 50 m3 = 3.5 g of ozone.
• Compensation:
  In reality, these calculations have to be compensated this way to find the actual size of the generator required:
  At 25˚C, the half-life of ozone in water is ~15 minutes (0.25 hours).
  To compensate for natural ozone decay in the water
  you will need to dissolve 3.5 g ÷ 0.25 = 14.0 g/h and not 3.5 g/h as calculations without compensation may suggest.

Factors to Help Determine Ozone Generator Size:  We only recommend un-occupied Shock Treatment use. 

The recommendations we give are conservative and designed for professionals in the mold redemption, fire & flood restoration, and odor removal businesses. When charging for a service in these professions, companies cannot afford to have to come back and retreat, or re-initiate the application. This is the reason for our conservative recommendations. 

It is fairly common for some companies to advertise and recommend the size or output of an ozone generator with only square footage ratings for general air purification results in mind, rather than actual output levels needed for germ killing with Shock treatments.  There is some confusion of output ratings (usually square footage ratings) or how much ozone will be needed for a particular application.  Some of these sizing recommendations can be misleading.  (note that ppm, or "Parts Per Million" is not an ozone output measurement and should never be used to compare ozone generator outputs, only go by the Milligrams per Hour; "mghr").  Since sizing an ozone generator is dependant on several factors, we try to avoid giving unqualified square footage and ppm ratings.  Square footage ratings must also disclose whether they are for air purification, or for Shock treatments, as the mghr output recommendations will be vastly different.

Note that 0.2% of ozone is a significant level; this is why ozone concentration is measured in Parts Per Million (PPM).  It only takes 3-4 PPM to kill off all germs, including MOLD, Bacteria, and Viruses.

For Recommendations on just air purification, see "How To Purify Air"  After reviewing the information on this page to find the basic variables that affect your application, you are welcome to us your application information / variables for recommended output of an ozone generator at .
 

There are a couple questions and a few variables to consider when choosing an ozone generator. 

The intended use should be determined.  The basic choice is:

1) Air Purification  We only recommend un-occupied Shock Treatment use. 

Contact us to discuss your requirements of ozone monitoring equipment. Our experienced sales team can help you identify the options that best suit your needs.

2) Shock Treating along with air purification. 

We only recommend Shock Treatment use.  Shock treatment use is when ozone in put into a room at high levels, usually for a few hours, to even a few days, to kill germs, mold, smoke or any odor.  Shock treatment use requires significantly more ozone than air purification, but is the best way to get maximum effectiveness of an ozone generator.

 

6 variables to consider to determine the appropriate size ozone generator:

(1) Type of contamination:

• Odors only in the air, such as smoke, indoor air pollution, chemical fumes, exhaust, and other emissions can be eliminated with ozone usually in short time with mild shock treatments.  However, Mold, organic or protein decomposition, skunk, smoke damage from a building fire, heavy cigarette or cigar smoke build-up from tenants or heavy smokers, and other extreme odors require longer treatment times, and, or a higher concentration of ozone for several hours, to several days of treatment time.

(2) Level of contamination:

• If the contamination is severe, more time, and or more ozone will be needed for the treatment.  In the case of HEAVY MOLD, HEAVY FIRE DAMAGE (SMOKE), or Crime Scene Clean-UP (decomposed protein), an expert construction company or specialist familiar with proper clean-up / remediation procedures should be consulted.  You can get an idea of what will be necessary for complete remediation of these heavy contaminant issue types by viewing our MOLD page.  Similar procedures will be followed for Fire / Smoke, and crime scene clean-up and other decomposed protein treatments.

(3) Size of treatment area:

• The size of the treatment area is extremely important in choosing the right size ozone generator.

(4) Temperature:

• Ozone is depleted much more rapidly in high temperatures, than in low temperatures.  At COLD temperatures, such as freezing, ozone may not be depleted for over 30 Days.  It is important to use ozone in temperatures above 60 degrees Fahrenheit. See understanding ozone depletion.

(5) Humidity:

(6) Desired treatment time:

• more ozone will be required for shorter treatment times, less for longer treatment times.

 

Recommended equipment:

For commercial mold or decontamination shock treatments .5-2 g/hr ozone should be used for every 100 sq/ft, depending on how fast the job needs to be done and how bad the problem is. With .5 g/hr / 100 sq/ft treatment should last for 1-2 days +, with 2 g/hr / 100 sq/ft it should only take about  6-12 hours.  NOTE that for UV ozone generators, only half the rated ozone above is usually necessary as these formulas consider only corona discharge ozone generators used in average humidity (which greatly reduces output of a corona discharge ozone generator).  UV ozone generators ozone output is not reduced by humidity.

UV PRO 550, UV PRO 550AT, UV PRO AT, UV PRO , UV PRO , and UV PRO

 

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