Secondary Treatment Upgrades for Tākaka and Murchison WWTPs
New works were completed for the Tākaka and Murchison WWTPs that are owned and operated by Tasman District Council. The works focused on reducing nutrient loadings, increasing solids removal and building resilience against storm events.
Hydroflux designed and supplied an aeration solution using several Tornado Surface Aerators to both sites to assist with the upgrade of the secondary treatment process.
Tornado provides high oxygen transfer and intensive mixing capabilities in a wide range of applications. The Tornado aerator’s turbulent directional mixing and jet propulsion discharge assures that oxygen is quickly blended with the wastewater for unmatched oxygen transfer. The intense action of the jet propulsion shears wastewater solids to increase treatment performance and provide better contact for the oxygen and wastewater bacteria.
Some of the key technical features and design advantages include:
- Premium efficiency TEFC motors.
- Grease-lubricated bearings and a solid shaft ensure a vibration-free design.
- 304 or 316 fabrication of wetted parts
- Aeration and mixing occurs below the water surface to eliminate water spraying and splashing
- Well proven across New Zealand
Water moving past the propeller creates a low-pressure zone at the propeller hub. This draws air through the draft tube air inlet hole down to the propeller. Action of the propeller mixes the air stream with the water resulting in tiny bubbles. The air and water mixture is forced away from the propeller both horizontally and vertically effectively mixing and oxygenating the water.
| Parameter | Value |
| Selected Machine | 3/5HP TORNADO® Aspirator Aerators |
| Type | TORNADO® |
| Size | Class I – 3HP |
| Quantity of Units | 5 |
| Material | 316SS |
| Motor | 3/5HP NEMA Standard Induction Motor Techtop Industries GR3-CI-TF-182TC-4-B-D-3 |
| Voltage/Frequency | 380 V / 50 Hz |
| Protection Class | IP55 |
| Project Completed | 2023 |
