What are the different types of waste water treatment?

Onsite wastewater management systems have two main processes – treatment of wastewater to a certain standard, and application of the effluent (treated wastewater) to a land area on your property.

The most common types of onsite wastewater treatment systems are:

Wastewater can be treated to three standards:

  • Primary – minimal treatment involving flotation and settlement to separate solids and liquids, and disposal of the clarified but still contaminated effluent (such as septic tanks and composting toilets).
  • Secondary – more advanced treatment using air and biological processes to decompose the solids and chlorine to disinfect the liquid to a standard safe for irrigation (such as aerated wastewater treatment systems).
  • Tertiary – highly advanced systems that use air and biological processes as well as membranes and UV disinfection to treat wastewater to a very high standard (such as membrane filtration and advanced aerated wastewater treatment systems).

(credit source https://www.waternsw.com.au/ )