Sewage treatment apparatus

摘要

Sewage treatment apparatus having two tanks, one tank (1) to receive incoming sewage and the second tank (2) to allow settlement of the contents within the second tank. The sewage is discharged into the second tank via a first discharging means (20) and the contents of the second tank are discharged, after settlement, via a conduit (12). The apparatus also has control means to control the intervals at which the first and second discharging means operate, in dependence on time and/or the level of material in the first and second tanks. The settlement tank (2) is concentric within the waste entry tank (1). Waste is pumped back into the first tank (1) from the second tank (2) to aid mixing. The outer tank (1) may be sludge activated and continuously aerated.