The invention relates to an automatic desanding system (fig. 29).

A branch passage (132) defines the in-line blowgun.

A grit chamber for a wastewater treatment plant.

A grit removal unit including an influent channel directing wastewater with grit into a round grit removal chamber and an effluent channel receives wastewater output from the chamber.

Find out how a grit tank cover solved the problem.

To ensure its operation, the desanding device also has sliding gates and dumping plates provided with a hole.

WWTP Covers Its Grit Tanks to Help Address Odor Concerns

The system comprises a single primary settling tank for the processes of grit removal, flow equalization, fine screening and primary clarification.

WWTP Covers Its Grit Tanks to Address Odor Concerns

The water to be treated is first conventionally screened, filtered of sand and degreased, then placed successively into two tanks which are pressurized in a closed circuit.

An input channel (and method of making an input channel) for the flow of waste water into a grit removal unit.

The desanding device works intermittently by means of a control system thereby achieving low energy consumption per kg. of removed sand.

Novel design guidelines for longer desanding facilities were developed targeting application by design engineers.

Unit (107) includes an eductor (109) which feeds the screened and treated sand slurry to desanding units (112) such as hydro cyclones.

Removal of sand and grease: the sand forms a sediment at the bottom and the grease rises to the surface due to flotation.