Abstract: A variable process for treating wastewater at a localized sewage treatment system positioned at the site of the wastewater generation is disclosed. Wastewater initially flows from a residence or business into a first operational area of the wastewater treatment system where a majority of the solid material in the wastewater is allowed to separate out of the wastewater. The wastewater is transferred from the first operational area to a second operational area. At a predetermined transfer time, if the wastewater in the second operational area is at least equal to a predetermined transfer volume, a batch of the wastewater is transferred from the second operational area to a third operational area. The batch of wastewater in the third operational area is aerobically treated for an amount of time based on the volume of the batch of wastewater. The treated wastewater is then transferred from the third operational area for dispersal.

Abstract: A localized wastewater treatment system for biologically treating wastewater. Raw wastewater flows into a first operational area where a majority of solid material in the wastewater separates out of the wastewater and is retained in a solids area positioned below the first operational area. As the wastewater continues to flow into the first operational area, the wastewater overflows from the first operational area to a second operational area. Once the wastewater in the second operational area reaches a predetermined volume, a batch of the wastewater is transferred from the second operational area to a third operational area where the batch of wastewater is biologically treated by a population of microorganisms contained within a solids area located beneath the third operational area. The treated wastewater is then removed from the third operational area for dispersal.