A degassing tower removes dissolved carbon dioxide from recirculating water and raises dissolved oxygen at the same time. In the MAT DGT series the same vessel also holds a fixed bed of aerated PE media, so nitrification takes place alongside gas exchange rather than in a separate biofilter downstream.
Pre-filtered water enters at the top of the tower and trickles down through the media bed. Air is blown counter-current through the packing and strips CO2 from the descending water film. Bacteria colonising the media surface oxidise total ammonia nitrogen to nitrite and then nitrate. Treated water collects in the base and returns to the system.
Key Features
- Combined duty: CO2 stripping, oxygen recovery and fixed-bed nitrification in a single vessel
- Shell in food-grade polypropylene, 5 mm minimum wall thickness
- Delrin bolts and nuts with uPVC valves, specified for saltwater service
- Access via acrylic observation windows, side manways and a 600 x 600 mm service hatch
- Grating layers above and below the packing, plus level indicator, sight gauge and drain valve
- Eight standard models covering 25 to 1,200 m³/hr; custom units to 10,000 m³/hr
- Options: automated cleaning system, PLC control panel, ORP/pH, CO2, dissolved oxygen, turbidity and water level sensors, variable frequency drives, PP/GRP access platforms and degassing media packages
- Manufactured in Turkey by MAT-Kuling
Technical Details
| Model | Flow rate (m³/hr) | Tank diameter (mm) | Height (mm) | Media volume (m³) | Blower / cleaner power |
|---|---|---|---|---|---|
| DGT-25 | 25 | 500 | 2,570–2,870 | 0.26–0.33 | 0.25 / 1.33 kW |
| DGT-50 | 50 | 750 | 2,630–3,030 | 0.57–0.75 | 0.25 / 1.77 kW |
| DGT-100 | 100 | 1,000 | 2,750–3,300 | 1.02–1.34 | 0.25 / 1.77 kW |
| DGT-150 | 150 | 1,250 | 2,825–3,375 | 1.6–2.09 | 0.37 / 5.5 kW |
| DGT-300 | 300 | 1,600 | 3,095–3,645 | 2.61–3.42 | 0.37 / 7.5 kW |
| DGT-600 | 600 | 2,350 | 3,350–5,000 | 5.64–7.37 | 1.1 / 11 kW |
| DGT-900 | 900 | 2,850 | 3,650–5,300 | 8.29–10.84 | 2.2 / 18.5 kW |
| DGT-1200 | 1,200 | 3,250 | 4,040–5,690 | 10.78–14.1 | 4 / 22 kW |
Height and media volume are quoted as ranges because bed depth is set to suit the duty. Sizing is set by recirculation rate, target CO2 and the total ammonia load from the feed rate. A vacuum configuration is available on request across the same flow range.
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