Reverse Osmosis Water Treatment.

Biological fouling of reverse osmosis is a common problem leading to reduced efficiency and reduced membrane life. CleanOxide Liquid 75 is pure Chlorine dioxide which is a highly effective biocide ideal for use in reverse osmosis systems. CleanOxide Chlorine Dioxide has all the important regulatory approvals in Australia and overseas to be used in water treatment and food processing.

Many strategies have been developed in an effort to control biofouling of Reverse Osmosis membranes including the use of sodium hypochlorite, non-oxidising biocides, heat and pH swings. Controlling the presence of food sources in the feed water and other good housekeeping practices also contribute to controlling the build up of biological contamination on the membrane.

Oxidising biocides such as hydrogen peroxide and chloramines have also found some limited use for aggressive cleaning of Reverse Osmosis membranes when other treatments have failed. Special care is required with these oxidising agents to ensure that no iron or manganese is present in the feed water as the presence of these elements can result in membrane damage.

Free chlorine is known to damage Reverse Osmosis membranes and this has precluded the use of chlorine gas in the feedwater for Reverse Osmosis systems. Conventional methods of generating chlorine dioxide are accompanied by the production of small amounts of free chlorine which has limited the use of chlorine dioxide for cleaning Reverse Osmosis membrane systems in the past despite the overwhelming advantages of chlorine dioxide.

Effectively Eliminate Harmful Organisms with CleanOxide

When dosed into the reverse osmosis water treatment system at the recommended rate, CleanOxide will control bacteria, fungi, viruses, algae and biofilm. Higher rates will allow the control of micro-organisms on hard surfaces contacted by the irrigation spray such as workbenches, pots and glass in greenhouses.

Compatibility of Chlorine Dioxide with Reverse Osmosis Membranes

Reverse osmosis membranes are made of a variety of polymeric materials as well as composites of several materials. In general, chlorine dioxide has been shown to be compatible with commonly used Reverse Osmosis membrane materials at low concentrations (<3mg/L) well above the recommended rates at which CleanOxide Liquid 75 is used. Many of the reported problems with chlorine dioxide reacting unfavourably with Reverse Osmosis membranes can be traced back to impurities in the chlorine dioxide such as free chlorine or high levels of acidity (low pH). CleanOxide is totally devoid of any free chlorine and is not acidic when diluted with water.

However, ACTIV8H2O strongly recommends that CleanOxide Liquid 75 is tested on a small portion of the membrane at the maximum proposed rate, if there is any doubt about the compatibility of the membrane material with chlorine dioxide. It should also be noted that because chlorine dioxide is a gas dissolved in water and is not hydrolysed by the water, it can diffuse into the membrane and pass through the membrane to provide biocidal protection downstream of the membrane. This may be of considerable advantage in some situations where the discharge water is for drinking.

In other situations, where very high purity in the discharge water is paramount, great care should be taken to use CleanOxide Liquid 75 only occasionally to control biofouling.

Benefits of CleanOxide Chlorine Dioxide

  • Non-corrosive with steel, metal, aluminium, plastic & fibreglass at the recommended dose rates.
  • Removes biofilm slime from water tanks and pipes at shock dosing rates.
  • Oxidises iron & manganese.
  • 100% bio-degradable
  • Sustainable, environmentally friendly
  • Safe for our oceans and natural water ways, leaves no harmful residues in water after 72 hours of treatment.
  • Broad spectrum disinfectant effective against bacteria, bacterial spores, fungi, protozoa, viruses, biofilm & algae.
  • Effective over a broad pH range of 4 to 10.
  • 10 times more powerful than chlorine.
  • Effective at lower dose rates than chlorine & hydrogen peroxide.
  • Does not contain free chlorine.
  • Does not react with ammonia & does not produce toxic compounds in contact with organic materials present in water.
  • Effective against biofilm because it exists in solution as a dissolved gas. The dissolved gas is able to diffuse into the biofilm where it can destroy the micro-organisms responsible for the biofilm.
  • Micro-organisms do not develop resistance to CleanOxide.
  • Safe for consumption and approved for use in Australia and around the world.

Reverse Osmosis Water Treatment.

Biological fouling of reverse osmosis is a common problem leading to reduced efficiency and reduced membrane life. CleanOxide Liquid 75 is pure Chlorine dioxide which is a highly effective biocide ideal for use in reverse osmosis systems. CleanOxide Chlorine Dioxide has all the important regulatory approvals in Australia and overseas to be used in water treatment and food processing.

Many strategies have been developed in an effort to control biofouling of Reverse Osmosis membranes including the use of sodium hypochlorite, non-oxidising biocides, heat and pH swings. Controlling the presence of food sources in the feed water and other good housekeeping practices also contribute to controlling the build up of biological contamination on the membrane.

Oxidising biocides such as hydrogen peroxide and chloramines have also found some limited use for aggressive cleaning of Reverse Osmosis membranes when other treatments have failed. Special care is required with these oxidising agents to ensure that no iron or manganese is present in the feed water as the presence of these elements can result in membrane damage.

Free chlorine is known to damage Reverse Osmosis membranes and this has precluded the use of chlorine gas in the feedwater for Reverse Osmosis systems. Conventional methods of generating chlorine dioxide are accompanied by the production of small amounts of free chlorine which has limited the use of chlorine dioxide for cleaning Reverse Osmosis membrane systems in the past despite the overwhelming advantages of chlorine dioxide.

When dosed into the reverse osmosis water treatment system at the recommended rate, CleanOxide will control bacteria, fungi, viruses, algae and biofilm. Higher rates will allow the control of micro-organisms on hard surfaces contacted by the irrigation spray such as workbenches, pots and glass in greenhouses.
Reverse osmosis membranes are made of a variety of polymeric materials as well as composites of several materials. In general, chlorine dioxide has been shown to be compatible with commonly used Reverse Osmosis membrane materials at low concentrations (<3mg/L) well above the recommended rates at which CleanOxide Liquid 75 is used. Many of the reported problems with chlorine dioxide reacting unfavourably with Reverse Osmosis membranes can be traced back to impurities in the chlorine dioxide such as free chlorine or high levels of acidity (low pH). CleanOxide is totally devoid of any free chlorine and is not acidic when diluted with water.

However, ACTIV8H2O strongly recommends that CleanOxide Liquid 75 is tested on a small portion of the membrane at the maximum proposed rate, if there is any doubt about the compatibility of the membrane material with chlorine dioxide. It should also be noted that because chlorine dioxide is a gas dissolved in water and is not hydrolysed by the water, it can diffuse into the membrane and pass through the membrane to provide biocidal protection downstream of the membrane. This may be of considerable advantage in some situations where the discharge water is for drinking.

In other situations, where very high purity in the discharge water is paramount, great care should be taken to use CleanOxide Liquid 75 only occasionally to control biofouling.

  • Non-corrosive with steel, metal, aluminium, plastic & fibreglass at the recommended dose rates.
  • Removes biofilm slime from water tanks and pipes at shock dosing rates.
  • Oxidises iron & manganese.
  • 100% bio-degradable
  • Sustainable, environmentally friendly
  • Safe for our oceans and natural water ways, leaves no harmful residues in water after 72 hours of treatment.
  • Broad spectrum disinfectant effective against bacteria, bacterial spores, fungi, protozoa, viruses, biofilm & algae.
  • Effective over a broad pH range of 4 to 10.
  • 10 times more powerful than chlorine.
  • Effective at lower dose rates than chlorine & hydrogen peroxide.
  • Does not contain free chlorine.
  • Does not react with ammonia & does not produce toxic compounds in contact with organic materials present in water.
  • Effective against biofilm because it exists in solution as a dissolved gas. The dissolved gas is able to diffuse into the biofilm where it can destroy the micro-organisms responsible for the biofilm.
  • Micro-organisms do not develop resistance to CleanOxide.
  • Safe for consumption and approved for use in Australia and around the world.