The Right Way to Perform a DAF System Startup
If you’ve just got your hands on a shiny new DAF system, you’re probably anxious to get the thing running. But before you start muddying it up with wastewater, there are a few important things to run through. Follow this 10-step guide to perform a proper DAF system startup.
1. Review the Operation & Maintenance Manual
You’ve absolutely got to understand how the system functions and the right ways to keep it working for years to come.
2. Set the Operational Valves in Their Correct Position
This includes pump isolation valves, feed valves, chemical valves and aeration system valves.
3. Fill the DAF System with Clean Water
Fill the whole thing with clean water all the way up to the edge of the adjustable outlet weirs. It’s a safety and maintenance issue.
4. Adjust the Outlet Weirs
Bring them all the way up to their highest position. This allows for the greatest volume of water in the tank and is a good baseline for your first run of wastewater.
5. Check your Recycle Pumps
Make sure they’re properly oiled and aligned to eliminate vibration. This will be the heart and soul of the whole operation. Get it set right from the get go.
6. Verify Pump Rotation
The recycle pump comes with a 3-phase motor. Bump the motor and make sure it’s rotating in the correct direction.
7. Check Motor Rotation
The DAF system has motors for the auger and skimmer. Skimmer blades should move toward the sludge ramp. Auger should push toward the outlet. Make sure they’re rotating correctly.
8. Test Electrical and Pneumatic Devices
They should actuate when a signal is sent from the panels. Make sure they’re calibrated to close slowly and not slam shut.
9. Perform Whitewater Test
Refer to the O & M manual for the procedure for generating whitewater. When you’ve got it correct, the water coming into the DAF system will look a little like skimmed-milk. After several minutes, the whole tank should be saturated with microbubbles.
10. Check for Obstructions
Confirm that the rotating top skimmer is not obstructed. All hoses and debris should be removed from the tank.
With that said, if there’s something you’re not quite sure about, err on the side of safety and contact us. That’s what we’re here for.