Complete Guide to Aerobic Fermentation Technology: Key Processes & SUNEFUN Case Study

1. Core Principles: Optimizing Microbial Activity

Carbon-to-Nitrogen Ratio (C/N) Model: For kitchen waste, a C/N ratio of 25:1 is ideal to balance microbial growth and organic decomposition. Deviations can delay fermentation or reduce output quality.

Oxygen Diffusion & Mixing Frequency: Maintain oxygen levels above 8% through calculated aeration intervals. For example, turn piles every 24–48 hours during the thermophilic phase to prevent anaerobic conditions.

2. Operational Phases: Temperature Control Protocol

Stage 1: Activation (55°C)

Initiate microbial activity by heating the pile to 55°C within 24–48 hours. This phase kills pathogens like E. coli while activating thermophilic bacteria.

Stage 2: Thermophilic (65–80°C)

Sustain high temperatures for 5–7 days to accelerate lignin breakdown and weed seed sterilization. Continuous aeration prevents overheating (>80°C), which inhibits microbial efficiency.

Stage 3: Cooling (40°C)

Gradually reduce heat to stabilize humus. At this stage, moisture drops to 30–40%, ensuring safe storage and nutrient retention.

3. Advanced Equipment Solutions

Screw Press Dewatering: Use spiral compactors to reduce feedstock moisture to <40%, enhancing porosity for optimal oxygen diffusion.

Gas Purification: Integrated biofilters or activated carbon systems reduce NH₃ and H₂S emissions by 90%, complying with EU odor control standards.

4. Case Study: SUNEFUN 3rd-Gen Fermentation System

SUNEFUN’s reactor achieves a 35% faster maturation rate (24-hour cycle) through:

• AI-Driven Monitoring: Real-time adjustments of temperature, humidity, and aeration via IoT sensors.
• Modular Design: Scalable units process 1–50 tons/day, ideal for SMEs and large organic waste facilities.
• Energy Efficiency: Heat recovery systems cut energy use by 20%, reducing operational costs.

Field tests show 99% pathogen elimination and 70% volume reduction, making it a benchmark for industrial-scale aerobic fermentation.