Grid Aeration Units
with Side Air-Supply
TWO-COLUMN GRID AERATION UNIT
WITH CENTRAL LIFTING COLUMN AND SIDE AIR-SUPPLY COLUMN
Mapal’s two-column grid aeration unit with central lifting column and side air-supply column is designed for rectangular basins requiring flexible aeration layouts, robust construction, and efficient installation. Based on Mapal’s grid aeration concept, this configuration supports uniform air distribution and reliable mixing while allowing extended piping layouts and broad design flexibility across the basin floor.
Available with tubular or disc diffusers, the system can be manufactured in large dimensions to accommodate a high number of diffusers according to project requirements. It may also be supplied partially pre-assembled for on-site floor assembly, helping reduce installation time and avoiding the need for floor levelling or anchor drilling in many applications.
The unit features a marine-grade stainless steel (304/316) structure for durability and long service life. Depending on project requirements, the system can be configured as removable or non-removable, providing additional flexibility in balancing operational needs, installation method, and project cost.
Available Configurations
Stationary Grid Tubular Diffuser with Side Air-Supply
Mapal’s floor-resting grid aeration unit with side air-supply column and tubular diffusers is designed to provide uniform air distribution and reliable mixing in rectangular basins. This configuration supports extended piping layouts and can be manufactured in large dimensions, making it suitable for projects requiring broad basin coverage and flexible aeration design.
The tubular diffusers incorporate marine-grade stainless steel (304/316) inner tubes fitted with fine-bubble sleeves in EPDM, silicone, or PU. The system may be supplied partially pre-assembled for on-site floor assembly, helping reduce installation time and avoiding the need for floor levelling or anchor drilling in many applications.
The unit features a marine-grade stainless steel (304/316) structure for durability and long service life. Depending on project requirements, it can be supplied as a removable or non-removable installation.
Technical Snapshot
| Parameter | Description |
|---|---|
| Diffuser length range | 500-2500 mm |
| Airflow per 1 m tubular diffuser | 4-12 m³/h |
| Configuration | Floor-resting grid |
| Diffuser Type | Tubular (EPDM, Silicone, PU) |
| Structure Material | Stainless Steel 304 / 316 |
| Installation Method | Crane-installed and/or assembled on the reactor floor, according to project requirements |
| Maintenance | Removable or non-removable, according to project requirements |
| Retrofit Compatibility | Excellent |
Stationary Grid Disc Diffuser with Side Air-Supply
Mapal’s floor-resting grid aeration unit with side air-supply column and disc diffusers is designed for rectangular basins requiring robust construction, flexible layout, and consistent oxygen transfer performance. This configuration allows extended piping layouts and can accommodate a high number of disc diffusers, making it suitable for projects requiring broad basin coverage and adaptable aeration design.
Mapal’s grid aeration units with disc diffusers are compatible with disc diffusers from any manufacturer. The system may be supplied partially pre-assembled for on-site floor assembly, helping reduce installation time and avoiding the need for floor levelling or anchor drilling in many applications.
The unit features a marine-grade stainless steel (304/316) structure, ensuring durability and long service life. Depending on project requirements, it can be supplied as a removable or non-removable installation.
Technical Snapshot
| Parameter | Description |
|---|---|
| Disc quantity range per unit | 80-500 pcs |
| Airflow per single disc diffuser | 2-8 m³/h |
| Configuration | Floor-resting grid |
| Diffuser Type | Disc (EPDM, Silicone, PU) |
| Structure Material | Stainless Steel 304 / 316 |
| Installation Method | Crane-installed and/or assembled on the reactor floor, according to project requirements |
| Maintenance | Removable or non-removable, according to project requirements |
| Retrofit Compatibility | Excellent |
Where This Unit
Performs Best
Two-column grid aeration units with central lifting column and side air-supply column are particularly well suited for:
Large Rectangular Aeration Basins
The grid configuration supports broad basin-floor coverage, reliable air distribution, and flexible layout planning in large rectangular treatment basins.
Projects Requiring Efficient On-Site Installation
The system may be supplied partially pre-assembled for assembly directly on the reactor floor, helping reduce installation time and simplify site works.
Applications Where Floor Drilling or Levelling Is Undesirable
The configuration can be installed without the need for floor levelling or anchor drilling in many applications, simplifying implementation and reducing installation complexity.
Plants Preparing for Future Load Increases
The design can be tailored to project-specific requirements and accommodate a high number of tubular or disc diffusers, supporting future increases in treatment demand.
Aging Diffuser System Replacement
Provides an effective replacement option for existing diffuser systems without requiring extensive civil modifications.
Facilities Seeking Long-Term Reliability
Marine-grade stainless steel construction ensures durability and dependable long-term operation in demanding wastewater treatment environments.
Engineered For Robust Basin Coverage
The two-column grid layout with central lifting column and side air-supply column is designed for large aeration basins requiring robust construction, flexible layout, and reliable air distribution. Its floor-installed configuration supports stable biological performance while allowing the system to be tailored to project-specific requirements, including future increases in treatment loads.
Typical Applications
Municipal Wastewater Treatment Plants
Industrial Wastewater Treatment
Retrofit Upgrades of Aging Aeration Systems
Why Mapal
Drop-In, Retrievable Solutions
No-Downtime Installation
Proven Global Installations
Municipal Wastewater Treatment Plants
Planning an Upgrade or Retrofit?
Let our engineering team evaluate your basin and recommend the optimal aeration configuration for your process requirements.