DAF System Troubleshooting Guide

Systematic approach to resolving issues in Dissolved Air Flotation systems

Abnormal Air Bubble Generation

Core Issue for DAF Efficiency

Check the dissolved air generator pressure settings
Inspect air diffusers for clogs from sludge or debris
Clean diffusers with a soft brush or appropriate solvent
Verify the reflux pump operation for smooth water circulation

Incorrect pressure often leads to poor bubble formation

Poor Contaminant Removal

Suspended Solids, Oil, or Grease Issues

Verify correct type and concentration of coagulants/flocculants
Check for uneven flow (short-circuiting) in flotation tank
Adjust inlet baffles or reposition water distribution pipes
Ensure sludge skimmer is working properly

Improper dosing prevents pollutants from forming proper flocs

Sludge Discharge Issues

Sludge Exit Problems and Line Clogs

Inspect sludge skimmer or scraper for mechanical jamming
Clear obstructions from skimmer's path
Examine discharge port and connecting pipes for blockages
Adjust sludge discharge frequency to prevent excessive thickening

Use water flushing or soft tools to remove compacted sludge

Unusual Noises or Leaks

Mechanical and Sealing Problems

Check pumps or motors for loose components
Ensure proper lubrication of moving parts
Inspect hoses, seals, and tank joints for wear
Replace damaged seals and fasten connections securely

Prevent water or chemical loss through proper maintenance

Important: After resolving any issues, always run a test cycle to confirm system performance, and document the problem and solution for future reference.

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