How to troubleshoot DAF System Water Treatment issues

Check chemical dosing: Insufficient or excessive coagulants/flocculants can reduce attachment between contaminants and bubbles—adjust doses based on water quality tests.
Examine water flow rate: Overly high flow may disrupt bubble-contaminant contact, while low flow can cause uneven treatment.
Monitor influent water quality: Check if the influent water quality has changed and adjust system parameters accordingly.
Inspect skimming mechanism: Ensure it's working properly to remove floated contaminants, as clogged or slow skimmers leave pollutants in treated water.

Inspect air compressor or dissolved air pump: Low air pressure or airflow will produce insufficient bubbles, while leaks in air lines can reduce pressure—repair leaks and adjust pressure to recommended levels.
Check dissolved air release valves: Blocked valves disrupt bubble formation, so clean them thoroughly.
Examine recirculation pump: Reduced flow through the dissolved air tank limits air dissolution, so ensure the pump is operating at full capacity.
Verify pressure vessel stability: If using a pressure vessel, verify its pressure is stable, as fluctuations affect bubble size and distribution.

Inspect mechanical components: Check pumps for loose parts or worn bearings, which cause noise and reduced performance—tighten connections or replace worn parts.
Examine motor for overheating: Poor ventilation, electrical issues, or overloading can trigger overheating, so clean vents and check electrical connections.
Test safety switches: If the system shuts down unexpectedly, test safety switches to see if they're tripped—reset switches and address the root cause.
Check for blockages: Look for blocked pipes or valves that create pressure buildup, and clear any obstructions.

Adjust skimming rate: Slow skimming allows sludge to reabsorb water, while fast skimming may leave excess solids—match skimming speed to sludge production.
Check sludge discharge pump: Clogged intake lines or worn impellers reduce pumping efficiency, so clean lines or replace parts.
Verify chemical dosing balance: If sludge is too thick, verify if the chemical dosing is balanced and adjust doses.
Inspect sludge collection tank: Check for buildup; regular cleaning prevents clogs that disrupt discharge, ensuring smooth sludge removal and system operation.

DAF System Troubleshooting Guide