Domestic waste water treatment tank has anaerobic and aerobic treatment sections, followed by mechanical filtration

摘要

The tank has an inlet and outlet (12) and inner compartments (14, 16, 18) providing anaerobic treatment and separation of fats, aerobic treatment of the pre-treated water, and final mechanical filtration. The initial compartment (14) has a decantation chamber with a passage leading to the second compartment (16), in which the pre-treated water is oxygenated by an air injector and clarified in a settling section to avoid the passage of flocculated particles and aerobic bacteria reaching the final compartment. In the latter the clarified water is filtered by a stainless steel mesh, or textile/geotextile filter material.