Domestic aerobic wastewater treatment systems are a modified version of an existing method of
treatment that is used for community sewage and industrial wastes.
The demand for individual aerobic wastewater treatment systems has occurred through changes in
wastewater technology; increased costs associated with the installation of deep drainage;
residential development in areas where conventional subsurface effluent disposal methods are
ineffective and the need to conserve water resources and protect the environment.
In South Australia a range of systems have been approved.
Some units require a separate primary
treatment tank (septic tank) and others consist of a larger tank incorporating primary treatment
(septic tank), aeration, clarification, settling, disinfection and storage chambers.
effluent is discharged by pumping to a dedicated surface irrigation disposal area.
may include two or more tanks configured to achieve the required level of treatment.
Whilst some units incorporate a trickling or rotating biological filter, the more commonly installed
systems use a variation of the extended aeration process. An outline of the typical operation of this
more common type follows.
The District Council has put together several Standard Forms and provided informative links to assist you in installing, maintaining and determining a Waste Control System that may best suite your needs.