Sewage treatment plants
Sewage treatment plants, also known as package treatment plants, combine the wastewater separation process with bio-treatment.
First, solids are separated from the water in the same way as with a septic tank. The water is then sent through a mechanical aeration tank, where bacteria is used to further break down harmful waste. The resulting wastewater can then be discharged into a drainage field or watercourse.
As with septic tanks, the new general binding rules for small sewage discharge to the ground apply.