The treatment tank is a tank designed to naturally decompose and destroy various pollutants (organic substances, chemicals, bacteria, etc.) in the wastewater. These tanks are used for the treatment of domestic or industrial wastewater.

Treatment tanks are typically made of concrete or polyethylene and have a defined volume. Waste water enters these tanks first and is treated here by passing through various stages. These stages can include physical, chemical and biological processes.

Physical processes involve the precipitation or leaching of solids in wastewater. Chemical treatments aim to add chemicals to wastewater and to remove pollutants. Biological processes, on the other hand, subject the wastewater to decomposition by bacteria and is decomposed by the natural decay of organic matter.

Treatment tanks are important to prevent the pollution of natural resources and to ensure the recovery of wastewater. Purified water can be reused in agriculture, horticulture, industry and even as drinking water.