Combined Pretreatment Units (Grit & Oil)
CM Aquatechnik supplies integrated aerated grit and grease removal chambers for municipal and industrial WWTP headworks. Combined units incorporate aerated grit removal (classifying type) and oil/grea
Technical Specifications
| Types | Aerated grit chamber · vortex grit · Pista® type |
| Grit Removal Efficiency | > 95% (> 0.2 mm particles) |
| Oil/Grease Removal | 50 – 80% |
| Flow Capacity | 50 – 10,000 m³/h |
| Grit Classifier | Inclined screw classifier for grit washing |
| Construction | Reinforced concrete or pre-fabricated SS |
| Air Diffusers | Coarse bubble (grit suspension) |
| Skimmer | Rotating surface skimmer |
| Standards | CE · EN 12255 |
Key Features
- Combined grit and grease removal reduces footprint by 40% vs. separate units
- Grit washing classifier reduces organics in grit for clean landfill disposal
- Air regulation controls spiral velocity for optimal grit classification
- Surface skimmer continuously removes floating oil and grease
- Protects downstream pumps, pipes, and biological systems from grit abrasion
- Pre-fabricated steel units available for fast delivery and installation
Applications
- Municipal WWTP headworks treatment
- Food and beverage effluent pre-treatment
- Stormwater combined sewer overflow
- Petrochemical produced water
- Refinery wastewater pre-treatment
- Industrial effluent inlet works
Product Overview
CM Aquatechnik supplies integrated aerated grit and grease removal chambers for municipal and industrial WWTP headworks. Combined units incorporate aerated grit removal (classifying type) and oil/grease skimming in a single compact structure, reducing civil works and installation cost compared to separate units.
Frequently asked questions
Why combine grit and grease removal in one unit?
A combined unit performs aerated grit removal and oil and grease skimming in a single compact structure. This reduces the footprint by around 40% compared with separate units and lowers civil works and installation costs.
What removal efficiencies can be expected?
Grit removal efficiency is above 95% for particles larger than 0.2 mm, and 50–80% of oil and grease is removed by the surface skimmer. Air regulation controls the spiral flow velocity in the chamber, so grit settles while lighter organic matter stays in suspension.
Concrete or prefabricated steel construction?
Units can be built in reinforced concrete or supplied as prefabricated stainless steel units. Prefabricated units allow fast delivery and installation, while concrete structures are typically chosen when the unit is integrated into new civil works; we recommend the best option for your flow and site.
What information do you need for a quotation?
Please provide the average and peak flow, the type of wastewater, the expected grit and oil/grease loads, and details of the upstream screening. Your preferred construction (concrete or prefabricated steel), the available space and the intended grit disposal route help us to complete the design. Send us your requirements and we will prepare a proposal within 48 hours.
