I cannot recommend the use of Ozonators for the treatment of sewerage odours. Instead you must deal with the underlying cause(s) of the symptomatic odour.
Anyone with noxious boat odours, or any other plumbing
problem, should read:
“MARINE SANITATION : Fact vs. Folklore”
~ By Peggy Hall
Peggy Hall (‘The HeadMistress’) is President of The Hall Group Inc. (Peal Products), and the Author of “Get Rid of Boat Odors”
(Seaworthy Publications 2003; 90 pages; $21.95), available at: http://shop.sailboatowners.com/detai...=400&group=327
Contact Peggy Hall at: peghall@firstname.lastname@example.org
The ozone molecule is the triatomic form of oxygen, containing three atoms (O3).
Ozone generation is accomplished by passing a high-voltage alternating current
(8-20kV) across a dielectric discharge gap, through which oxygen-enriched air is injected. As oxygen is exposed to the current
, some molecules disassociate to mono-atomic oxygen and combine with diatomic oxygen molecules. Ozone is also produced naturally, in the stratosphere, by the action of UV radiation on Oxygen, and by the effects of sunlight on car exhaust
Ozone, like other photochemical oxidants, is sufficiently chemically active, that even at low ambient concentrations, unfavorable effects of exposure have been observed.
Ozone (O3) causes irritation to the respiratory tract and to eyes. Contact with high levels of ozone can lead to chest tightness, coughing and wheezing. When exposed to ozone, people that have respiratory or heart problems are at a higher risk. Ozone has been connected to increased hospital admissions and premature death. Ozone also has an impact on agriculture and crops.
Can Ozone Cause or Exacerbate Corrosion?
Yes ~ No ~and~ Maybe ...
Review of the literature indicates that ozone damages many different types of materials functionally and aesthetically. The damage is caused at the molecular level, by chain scissoring and cross-linking mechanisms. In some cases there is an added synergistic degradation of materials, due to the presence of other ambient pollutants, specifically sulphur dioxide and nitrogen oxides.
The effects of ozone on natural rubber, general purpose diene rubber, and synthetic polymers of polyisoprene, polybutadiene, acrylonile-butadiene and styrene-butadiene, can be extremely damaging. Polymers such as polyethylene, polypropylene, nylon, and polystyrene appear to be embrittled by high ozone concentrations (ozone concentration>1000 ppm).
In contrast, neoprene, silicones, ethylene, butyl rubber, and propylene are inherently resistant to ozone damage.
Protection of elastomers can be increased by the use of antiozonants and waxes.
Cellulose fibers (such as cotton or silk) can be affected by ozone via the same mechanisms as elastomers (unsaturated double bond cleavage). Many textile dyes react with ozone, causing the colour of the dye to fade.
Surface Coatings (Paint):
Ozone has the ability to affect both the binder and the pigment in the paint
, causing premature aging (ICP, 1996). The mechanism of deterioration is via the oxidation of the organic binder material similar to the mechanism of elastomeric degradation.
Ozone impacts on elastomers and textiles have been observed at levels as low as 0.020 ppm (20 ppb), while the lowest concentration at which impacts on textile dyes and surface coatings were observed was 0.050 ppm (50 ppb).
In contrast to its effect on organic materials, ozone (on its own) has little ability to affect inorganic materials (e.g. metals and building materials). However, the presence of ozone in a sulphur dioxide-containing environment
accelerates the corrosion of zinc, silver, aluminum
, nickel, iron, and copper, among other metals. Ozone's effect on metals is also influenced by other environmental factors (e.g. temperature, humidity/wetness) in addition to the chemical composition of the atmosphere.
Ozone alone appears to have little effect on metal corrosion.
Cooling Water Treatment (Water Towers, Heat Exchangers):
Biological growth, scaling, and corrosion are the main maintenance
concerns with cooling
towers. Typical treatment has involved the application of chemicals such as chlorine, sulfuric acid, phosphorous, and zinc compounds (organics, biocide, pH stabilizers, etc). As traditional chemical water treatments are being restricted because of environmental concerns, ozone is gaining acceptance as a viable biocide alternative.
There have been several studies on corrosion rates in ozonated systems conducted and reported in trade
journals and other literature. The initial premise for cooling
tower systems using ozone for water treatment, was that because ozone is such a powerful oxidizer, those metals capable of developing a passive oxide film would be protected from the ozone residual have been mostly discounted.
~ may not be a significant health
~ may not present an increased corrosion problem,
~ is an effective anti-microbial, killing odour-causing bacteria.
Wouldn’t is be much more efficacious to prevent the underlying causes of these noxious odours (sewage), rather than merely treating the symptoms?