Test Results
HydroVenturi have demonstrated the performance of its’ core technology in a live site environment for both its’ Zero and Non-Zero Angle of Attack variants using the following test parameters:
SOTR (Standard Oxygen Transfer Rate) - Used as the standard measure of how quickly oxygen is dissolved in the water (kg/hr) and to size equipment to meet process oxygen demand.SOTE (Standard Oxygen Transfer Efficiency) - The percentage of oxygen in air transferred that actually dissolves into the receiving medium, usually given as a % per meter depth. Can be used to compare technology performance, where costs of entraining air are similar between competing technologies.
Hydroventuri SOTR at maximum void fraction and high water flow rates:
- ZAA2 – 0.72 kg/hr @ 25% void fraction
- NZA2 – 0.71 kg/hr @ 22% void fraction
Hydroventuri SOTE at reduced void fraction and high water flow rate:
- ZAA2 – 5.80 %/m (14.46%) @ 20% void fraction
- NZA2 – 7.63 %/m (19.08%) @ 13% void fraction
By contrast, typical value for the current state of the art fine bubble bed diffuser is 6.5%/m but which requires significant energy input and capital works.
While the SOTE ranks are good for all tests, excellent values were obtained for the NZA2 design operating at 13% void fraction. It can be seen that the percentage of entrained oxygen which dissolves into the water increases as the void fraction decreases.