Tangential Grit Chamber

Operating Principle

Wastewater is fed at the inlet zone of the conical tank and swirls along tank walls by means of the mixing device rotation. Grit slips along the walls of the conical tank and reaches the grit washing unit. Clarified wastewater is directed to the outlet branch for subsequent treatment stages. Grit is washed by pressure water in the grit washing unit. Grit is agitated by the mixer to improve the grit washing process. Washing water is drained to the subsequent treatment stages while the grit is collected at the tank’s bottom. From here it is removed to the discharge zone by the screw conveyor. The grit is discharged into the storage container or onto the transporter.

Advantages

• modular construction is ideal for small wastewater treatment plants
• does not require high capital costs.
• increased efficiency by using tangential motion of the fluid.
• casing manufactured from stainless steel is reliable and durable.

Automation

Automation of the grit chamber operation can be time based. All grit chamber geared motors (mixing devices and transporter) are equipped with electrical protection. Alarm systems of the normal operation indication and emergency stops are provided.

It is possible to transfer equipment status data to a higher level automated process control system depending on the client’s requirements. The screw can be reversed in order to address jams and congestion.