FAQs: True Grit Systems

Or-Tec True Grit Grit Removal Systems & Shaftless Screw Grit Classifier for Municipal and Industrial Wastewater

The Or-Tec True Grit Systems are complete grit removal system designed to separate, wash, dewater, and discharge grit from municipal and industrial wastewater. The system combines an in-ground vortex grit chamber with stainless steel mixers, an air lift pump, and an Or-Tec Shaftless Screw Grit & Sand Separator to efficiently remove sand and grit particles larger than 200 microns (0.007 inch) while reducing organic material before disposal.

Complete grit removal system: The Or-Tec True Grit System is a complete grit removal system that separates, washes, dewaters, and conveys grit removed from wastewater.

Integrated grit handling: It combines a vortex grit chamber, stainless steel mixers, an air lift system, and a shaftless screw grit classifier to produce cleaner grit for disposal while protecting downstream treatment equipment.

Feature	Specification
Grit Removal Size	Greater than 200 microns (0.007 in.)
Grit Classifier Type	Shaftless Screw Grit & Sand Separator
Construction	304 or 316 Stainless Steel
Screw Material	304 SS, 316 SS, or Hardened Carbon Steel
Organic Reduction	Integrated grit washing section
Optional Features	Air agitation, discharge flushing
Available Configurations	Complete True Grit System or Standalone Classifier
Classifier Integration	Available with Or-Tec Screw Screen Compactor
Applications	Municipal WWTP, Industrial Wastewater, Paper Mills, Sand Reclamation

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Or-Tec Shaftless Screw Grit Classifier Capacities

Model	Maximum Capacity
OTG 30	130 GPM
OTG 80	350 GPM
OTG 100	440 GPM
OTG 130	575 GPM

Complete grit removal: The Or-Tec True Grit System removes sand and grit particles larger than 200 microns (0.007 inch) before they reach downstream treatment equipment.

Protects critical equipment: Removing abrasive grit helps reduce wear on pumps, piping, valves, grit pumps, and other downstream wastewater treatment equipment, lowering maintenance requirements and extending equipment life.

Integrated grit handling: The system combines grit separation, washing, dewatering, and conveying into one complete process for dependable long-term operation.

Integrated grit washing: The Or-Tec True Grit System includes an integrated grit washing section that separates organic material from the grit as it is conveyed through the classifier.

Cleaner grit disposal: Washing the grit helps produce cleaner grit for disposal while reducing organic carryover and unnecessary disposal of organic material.

Improved plant efficiency: Reducing organics in the grit stream helps improve overall grit removal efficiency and wastewater treatment performance.

Controlled vortex separation: The system uses stainless steel mixers and paddles to create a controlled vortex inside an in-ground concrete tank.

Efficient grit removal: Sand and grit settle to the bottom while lighter organic material remains suspended, and an air lift pump transfers the concentrated grit slurry to the shaftless screw classifier where it is washed, dewatered, and elevated for disposal.

Fine grit removal: The Or-Tec Shaftless Screw Grit & Sand Separator removes sand and grit particles larger than 200 microns (0.007 inch).

Protects downstream equipment: Removing fine abrasive particles helps reduce wear on pumps, piping, valves, grit pumps, and other downstream wastewater treatment equipment.

Integrated grit washing: The Or-Tec classifier includes an integrated washing section built into the screw conveyor.

Cleaner grit for disposal: As grit is conveyed upward, the washing process separates organic material from the grit, producing cleaner grit for disposal and reducing unnecessary organic waste.

The Or-Tec True Grit System is commonly installed in:

• Municipal wastewater treatment plants
• Wastewater treatment plant headworks
• Industrial wastewater treatment systems
• Food processing facilities
• Paper mills
• Sand reclamation operations
• Industrial material processing
• OEM wastewater treatment systems

Shaftless screw design: Yes. The Or-Tec Grit & Sand Separator uses a shaftless screw that conveys, washes, and dewaters grit without a center shaft.

Reliable grit handling: This design helps minimize material buildup while providing reliable grit transport and long service life.

Standalone or integrated installation: Yes. The Or-Tec Shaftless Screw Grit & Sand Separator is available as a standalone grit classifier or as part of a complete Or-Tec True Grit System.

Flexible system configurations: It can also be supplied as a combined package with an Or-Tec Screw Screen Compactor for integrated screening and grit removal.

Complete automated grit handling: Yes. The Or-Tec True Grit System combines an in-ground vortex grit chamber, stainless steel mixers, an air lift pump, and a shaftless screw grit classifier into one integrated grit removal system.

Multiple processes in one system: The system separates, washes, dewaters, and conveys grit automatically, producing cleaner grit while protecting downstream wastewater treatment equipment.

Flexible installation options: The Or-Tec True Grit System is available as a complete grit removal system or as a standalone shaftless screw grit classifier, depending on the application's requirements.

Capability	Or-Tec True Grit System
Complete Grit Removal System	Yes
Shaftless Screw Grit Classifier	Yes
Removes Grit Larger Than 200 Microns (0.007")	Yes
Grit Washing	Yes
Grit Dewatering	Yes
Organic Reduction	Yes
Standalone Classifier Available	Yes
Optional Air Agitation	Yes
Optional Discharge Flushing	Yes
304 / 316 Stainless Steel Construction	Yes
Hardened Carbon Steel Screw Available	Yes
Municipal Wastewater Applications	Yes
Industrial Wastewater Applications	Yes
Paper Mill Applications	Yes
Sand Reclamation Applications	Yes

The Or-Tec True Grit System provides reliable grit separation, washing, dewatering, and conveying in a single integrated solution for municipal and industrial wastewater treatment.

By removing grit particles larger than 200 microns (0.007 inch) and reducing organic carryover, the system helps protect downstream equipment, reduce maintenance, and improve grit disposal. Available as a complete grit removal system or a standalone shaftless screw classifier, the Or-Tec True Grit System offers a durable, cost-effective solution for demanding wastewater applications.