The HeadCell® is a modular stacked tray grit separator that retains 95% of all grit 75 µm and larger with minimal headloss, protecting downstream equipment and processes from abrasive wear and sedimentation.

With a small footprint, no electrical requirements and no moving parts the HeadCell® delivers exceptional and economical solids removal for small, medium or large wastewater treatment plants.

The unique stacked tray design provides the surface area required for outstanding performance with a small footprint, enabling treatment capacity increases using existing space, and its durable design ensures long component life with mininal wear and grease build-up even under challenging operating conditions.

Enabling plants to meet stringent environmental requirements with less odors, the HeadCell® is the ultimate grit removal solution for new plants as well as representing a value-for-money retrofit option for grit removal upgrades. For new headworks grit control systems, the HeadCell® can be installed in a poured-in-place concrete basin above or at grade, with a footprint much smaller than conventional grit removal systems.


  • New wastewater treatment plants
  • Treatment plant retrofits
  • Grit and / or sediment removal for potable water applications
  • Industrial effluent degritting

Designed for

Fine particles

Very fine particles


Protect equipment and processes from abrasive wear and sedimentation

The HeadCell® outperforms all other types of grit separation, particularly when it comes to fine grit removal. Anyone can capture the larger particles, but it is fine grit - as small as 75 µm - which causes the biggest problems for plants. The HeadCell® system can be guaranteed to capture 95% of all grit 75 µm and larger.  

Maximize performance benefits and free up plant space

Structured flow and low velocity operation extend product life significantly. The HeadCell® operates all-hydraulically, and requires less than a foot of headloss to operate which saves your plant money. Tray sizes and the number of trays can be modified to meet your site’s specific flow and performance requirements and can often be retrofitted into existing basins. Multiple units can be provided to accommodate any flow and / or any turndown ratio.

Double the treatment capacity in the same footprint as existing grit equipment

There’s nothing like the HeadCell® - the unique and proprietary structured flow configuration minimizes grease build-up and allows for future capacity increases.

How it works

The HeadCell® captures fine particles due to the large surface area and short settling distances. Evenly split flow eliminates thermal short circuiting which reduces the performance of conventional grit basins, making the HeadCell® the ideal grit basin. The HeadCell® is a hydraulically driven forced vortex system which requires no moving parts to operate.

  1. The high efficiency flow distribution header evenly distributes influent over multiple conical trays.
  2. Tangential feed establishes a vortex flow pattern where solids settle into a boundary layer on each tray, and are swept down to the center underflow collection chamber.
  3. Settled solids are continuously pumped to a SlurryCup™ or TeaCup® grit washing system and then on to a Grit Snail® dewatering escalator.


Technical information


  • 95% removal of all grit 75 µm and larger
  • <15% volatile solids when used with Hydro International grit washing and dewatering equipment
  • >60% total solids output when used with Hydro International grit washing and dewatering equipment


  • Available with 4’, 6’, 9’, and 12’ diameter trays
  • The number of trays can be varied to match existing basin depth