Municipal WWTP Winter Crisis: 5 Science-Backed Strategies for Stable Operation

The Silent Threat: How 5°C Wrecks Urban WWTPs

Northern municipal plants face winter emergencies:

• Ammonia spikes exceeding 8 mg/L

• 40% longer dewatering cycles

• $12K/day penalties for TP violations

JUNTAI's 5-pillar solution combines biofilm engineering and waste heat recovery:

Pillar 1: Biofilm-Hybrid Reactors

• Design: 70% suspended biomass + 30% carrier-bound nitrifiers

• Performance:

  • 82% NH3-N removal at 8°C (vs 48% in conventional AAO)

  • 60% less sludge bulking

Pillar 2: Thermal Energy Harvesting

Case: Beijing suburb plant achieved:
✅ 11°C bioreactor temp without external heating
✅ 28% energy cost reduction

Pillar 3: Dynamic SRT Control

• Winter Protocol:

  • MLSS: 6,500 → 8,200 mg/L

  • SRT: 15 → 22 days

  • DO: 2.5 → 3.8 mg/L

• Results:

  • Nitrifier population increased 3.2x

  • Filamentous bacteria suppressed by 70%