Hydrogen Peroxide

Hydrogen Peroxide (H2O2) can be used as a disinfectant and is most commonly used in the treatment of groundwater, wastewater, and drinking water. Hydrogen peroxide must be monitored in order to maintain safe high-quality water free from harmful pathogens.

Hydrogen peroxide will slowly decompose into water and oxygen, without the formation of environmentally harmful by-products.

2 H2O2 → 2 H2O + O2

  • Pool and spa  – H2Ocannot be used as the only disinfectant in pools as it decomposes too quickly. H2Ois used to enhance the disinfectant power of other oxidisers such as chlorine, UV or ozone treatments. This can be a method of reducing the amount of chlorine in a swimming pool, which has benefits in terms of cost and bather experience.
  • Polluted soils/groundwater – H2O2can be used to increase the growth of bacteria used in bioremediation of polluted soils or groundwater. Bio-remediation is a process of using bacteria to remove pollution from water or soil.
  • Drinking water – H2Ocan be used to disinfect drinking water, this is particularly prevalent when disinfecting small scale sources such as wells. H2Odoes not affect the taste of the water unlike chlorine and works more effectively over a larger pH range.
  • Wastewater – H2O2 can be used as a disinfectant and can cause the organic matter to precipitate so it can be filtered out of the water using a carbon filter.

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