Municipal Disc Diffuser Maintenance: Solving Biofilm & Fiber Clogging in WWTPs

The Silent Threat: 42% Energy Waste from Municipal Diffuser Clogs

Urban WWTPs face unique challenges:

• Hair/fiber entanglement (30% headloss increase)

• Filamentous biofilm (Sphaerotilus dominance)

• Grit accumulation (>0.2mm particles)

JUNTAI's 15-year municipal data reveals optimized approaches:

Three-Pronged Prevention Framework

1. Anti-Entanglement Membrane Design

• Surface Texture: Micro-grooved (Ra=0.8μm)

• Pore Layout: Hexagonal array with 2mm guard spacing

• Performance:

  • Fiber capture reduction: 65%

  • Headloss stability: ΔP <0.15 bar

2. Biofilm Inhibition Technology

• Silver-ion embedded membranes: 99.9% Sphaerotilus suppression

• Pulsed aeration: 30s ON/90s OFF cycle disrupts EPS matrix

3. Grit Management System

• Pre-screening: 0.5mm Rotary Drum Filter

• Diffuser self-cleaning: Vortex-induced grit shedding

Case Study: Shanghai 200,000m³/day WWTP Retrofit

Operator Insight:
"The grooved membrane design eliminated hair clogs that previously required daily raking."