The GritCup™ is an efficient and economical all-hydraulic grit washing and classification device, which produces clean grit ready for dewatering. Since the unit does not require washwater and has no moving parts, operational costs and maintenance requirements are significantly reduced. The GritCup™ is typically used to wash the grit collected by the primary grit removal equipment, such as a Eutek HeadCell^® or Grit King^® grit separator, aerated grit chambers, vortex grit collectors, or other grit separators and is capable of separating and classifying grit 106 micron (150 mesh) and larger.   

Applications

• New wastewater treatment plants
• Treatment plant retrofits
• Grit washing for plants with no available washwater
• Grit washing for any grit collection device

Advantages

• Guaranteed efficiency – 95% removal of all particles 106 micron (150 mesh) and larger
• All hydraulic, non-mechanical design with no moving parts
• No washwater requirement
• Fully enclosed
• The unit is optimized for intermittent operation which reduces operating costs
• Maximized internal clearances minimize plugging
• No wear or replacement parts

Flow enters the GritCup™ tangentially, creating a vortex flow pattern. The GritCup™ utilizes a combination of vortex principles to achieve removal and washing performance while maintaining a low headloss.

The free vortex washing GritCup™ unit uses accelerated gravity to create a separation zone in which organics are removed from the heavier grit. Grit is retained while the organics are stripped away and exit with the degritted effluent. The system has no washwater requirements and requires virtually no operator inputs or in-field adjustments.

The degritted overflow and organic particles exit at the top of the vessel to be conveyed back into the wastewater stream. All of the collected solids are constantly discharged from the grit pot as concentrated slurry via the tangential underflow pipe.

A flow control device is located on the underflow pipe to regulate the volume of slurry exiting the GritCup™. The flow control uses a tangential inlet to create a vortex with an air core in the center that effectively limits the discharge through the centrally located outlet. This allows metered underflow from the GritCup™ without the restriction of a small orifice or pipe run and the associated danger of plugging.

Q. What is the GritCup™?

The GritCup™ is an economical grit washing device that can wash and separate fine grit with minimal operational cost and without the need for washwater.

Q. Is the GritCup™ the right solution for my plant?

The GritCup™ is recommended for plants with flows less than 10 mgd peak. Contact Hydro International to determine if the GritCup™ is suitable for your operating conditions. 

Q. Does the GritCup™ require additional equipment?

The GritCup™ is a washing unit and a grit dewatering unit will be required for a complete grit washing and dewatering system. The GritCup™ is typically paired with a SpiraSnail™ dewatering unit.

Q. Can the GritCup™ be used for retrofit projects?

The GritCup™ in combination with a SpiraSnail™ grit dewatering system is an excellent choice for smaller plants looking to upgrade their grit systems in retrofit applications.

Q. Is screening required before the GritCup™ system?

Yes, three quarter inch or finer headworks screening is required before the GritCup™.

Q. Does the GritCup™ require electricity?

The GritCup™ is an all-hydraulic process and requires no electricity to operate.

Q. Does the GritCup™ have to operate continuously?

The GritCup™ has been developed to prevent washout during startup which allows for intermittent operation that can save on energy cost and wear for the grit pumps.

Q. What material is the GritCup™ made of?

The GritCup™ is available in grades 304 and 316 stainless steel.