WATERTREATMENT

There are two important processes in potable water treatment:

  • Water Purification – to remove particular contaminants from a water source
  • Water Disinfection – specifically, a purification process that kills or removes biological contaminants (cysts, bacteria, viruses, protozoans, etc.) from a water source.

Traditional chlorination systems can kill a range of pathogenic microbes, however, it has the following disadvantages

  • It taints the water,
  • Is not effective against biofilms,
  • Is subject to pH effects and other inconsistencies
  • Is easily neutralised by organic materials
  • Fails to kill cryptosporidium and other protozoa and
  • Actually adds toxic chemical by-products (such as trihalomethanes) to the water in the disinfection process!

It is increasingly unpopular with both scientists and the public due to its tendency to interact with other chemicals in (drinking) water and produce toxic and carcinogenic compounds.
Traditional chlorination depends on releasing several forms of chlorine (together referred to as ‘free’ chlorine) into the water. These are namely some chlorine itself, hypochlorite ion and hypochlorous acid.  Hypochlorous acid is about 100 times more effective as a disinfectant than hypochlorite but the chlorination method only produces this in low levels.

Cooling systems
Legionnaires’ disease, caused by the bacterium Legionella pneumophila, is a sever form of pneumonia. In several hospital outbreaks, patients are thought to have been infected through exposure to contaminated aerosols generated by cooling towers. Legionellae resident within biofilms are a particular problem in cooling tower systems, and can prove difficult to eradicate by conventional means. It has been reported that biofilm bacteria can be up to 3000 times more resistant to standard chlorine disinfectants than unattached cells.

  • Problem: biofilm and therefore dangerous outbreaks of legionnaires’ disease. Biological induced corrosion due to biofilm. Scaling and inefficiency issues directly related to scaling
  • Solution: Continiuos dosing of NEW in to the cooling water kills all algae and prevents bio-film as well reduces scaling in the cooling system

Swimming pools

  • Problem: Periodical superchlorination of the pool destroys wet suits, attacks and irritates skin, without effectively killing the Pseudomonas bacteria. Rashes, burnt eyes and sinuses. Corrosion due to evaporation of chlorine gases. Strict storage, handling and transport regulation makes the use of chlorine expensive and not preferred. Usage of pH+ and other chemicals to keep pH of pool stable.
  • Solution: Dose an average of 1:800 NEW in the circulation water (after filtration and prior to the inlet of the pool) of indoor pools to keep the pool free of any bacteria. No more swimmers eyes or skin irritation, no chlorine smell.

Storm water

  • Problem: Stormwater discharges are generated by runoff from land and impervious areas such as paved streets, parking lots, and building rooftops during rainfall and snow events that often contain pollutants in quantities that could adversely affect water quality. Most stormwater discharges are considered point sources and require coverage by an NPDES permit. The primary method to control stormwater discharges is through the use of best management practices.
  • Solution: NEW can destroy bacteria and improve stormwater quality so that it renders no dangers to the environment and human beings

Drinking Water

  • Problem: drinking water in remote areas mostly depend on local disinfecting of ground, rain or surface water and requires dangerous transport of chlorine. If transported over a long distance quality of drinking water is not stable for different users as an overdosis chlorine has to be added to the drinkingwater to ensure contamination during transport.
  • Solution: NEW offers alternatives for transport of chlorine as well provide solutions to keep drinking water quality stable by local dosage of NEW.

Sewage Water

  • AW added into the waste water increases the surplus of electrons, that are needed for removal of heavy metals (industrial waste water treatment) or for the faster growing of the needed microorganisms (biological waste water treatment). AW is lowering the water tension and the growth of the organisms and the material exchange is significantly increasing. The efficiency of the biological cleaning is increasing significantly. The condition for the successful growth is a very low redox potential of the solution, the condition for stoping the growth is a very high redox potential.
  • NEW is increasing the redox potential and by this way disinfects the water. High redox potential is destroying bacteria and Viruses. Waste water will be disinfected before releasing in the natural environment.

Closed Water Systems

  • Effective for legionella control, water supplies can be continiously dosed with NEW to prevent and help reduce scale formation often seen in hard water areas. Also, NEW is periodically dosed to remove biofilms that have been known to protect legionella from other forms of disinfection. These water lines are maintained with NEW to prevent biofilms reforming.
  • Elimination of bad odor, improving taste and turbidity.

 

More information about Watertreatment