From Diagnosis to Equipment – Complete Solutions by Henan Mingwei
In organic fertilizer production, incomplete fermentation is the root cause of many issues such as poor product quality, crop burning, foul odors, and long production cycles.
Many producers invest significant labor and resources, yet still face problems like:
- Low pile temperature
- Strong ammonia or acidic odor
- Sticky or clumping materials
- Even complete fermentation failure
Based on the analysis of hundreds of real projects, Henan Mingwei has identified 7 core causes of fermentation failure and provides proven equipment + process solutions to ensure stable, efficient, and environmentally friendly production.
1. Improper Moisture Control (Most Common Issue)
Problem:
Too dry (<40%): microbial activity stops
Too wet (>70%): anaerobic fermentation, odor, no temperature rise
Ideal Level: ~60% (forms a ball when squeezed, no dripping)
Solution:
Tractor-driven compost turner with water spraying system for precise moisture adjustment
Walk-behind turner for small-scale, flexible operation
2. Imbalanced Carbon-Nitrogen Ratio (C/N)
Problem:
Too high (>30:1): slow fermentation
Too low (<20:1): ammonia loss, strong odor
Ideal Range: 25:1–30:1
Solution:
Wheel-type compost turner (PLC controlled) for uniform mixing
Crawler-type turner for windrow composting (500–1800 m³/h capacity)
3. Insufficient Oxygen Supply
Problem:
Compact piles, no turning → anaerobic conditions
Production of hydrogen sulfide (bad smell)
Solution:
Crawler turner for full aeration
Groove-type turner with forced ventilation
Professional guidance: turning 3–5 times during fermentation
4. Improper Raw Material Processing
Problem:
Large fibers (straw, branches) are difficult to decompose
Solution:
Cage crusher reduces material size to 3–5 cm
Increases surface area → faster microbial decomposition
5. Temperature Not Reaching or Maintaining Standard
Problem:
Small piles cannot maintain >55°C for 5–15 days
Pathogens and weed seeds not eliminated
Solution:
Horizontal / vertical / drum fermentation tanks
Fully enclosed, temperature-controlled
Fermentation completed in 7–15 days
Groove composting system for stable heat retention
6. pH Imbalance
Problem:
Acidic conditions in early stage inhibit microbes
Ideal Range: Slightly alkaline (7.5–8.5)
Solution:
Spraying system for lime water or ash solution
Fermentation tanks with pH monitoring & adjustment
7. Lack Of Effective Microbial Inoculants
Problem:
Natural microbes act slowly
Poor performance in cold weather or simple materials
Solution:
Mingwei high-efficiency microbial strains
Reduce fermentation time from 2–3 months to:
<1 month (turning system)
7–15 days (fermentation tank)
How to Verify Fully Matured Compost
After fermentation, Mingwei recommends these simple checks:
- Stable temperature (same as ambient, no reheating)
- Appearance & smell: dark brown, loose texture, earthy smell
- Plastic bag test: no swelling, no condensation, no odor after 24–48h
- Plant test: seeds germinate normally without damage
|
Fermentation Issue |
Recommended Equipment |
Core Function |
|
Improper Moisture Content |
Small Tractor-Driven / Walk-Behind Compost Turner (with spraying system) |
Turning + precise moisture adjustment |
|
Imbalanced C/N Ratio |
Wheel-Type Compost Turner / Crawler-Type Compost Turner |
Intensive mixing, eliminate local imbalance |
|
Insufficient Oxygen Supply |
Crawler-Type / Groove-Type / Wheel-Type Compost Turner |
Forced turning and aeration |
|
Oversized Raw Materials |
Cage Crusher |
Crush materials to 3–5 cm |
|
Temperature Not Reaching Standard |
Horizontal / Vertical / Drum-Type Fermentation Tank |
Enclosed high-temperature aerobic fermentation (7–15 days) |
|
pH Imbalance |
Compost Turner Spraying System / Fermentation Tank pH Adjustment Interface |
Uniform spraying of lime water for pH control |
|
Lack of Microbial Inoculants |
Mingwei Patented Fermentation Strains |
Rapid establishment of dominant microbial communities |
Why Choose Henan Mingwei?
- Proven solutions from hundreds of projects worldwide
- Full-service support: process design + equipment + after-sales
- Custom solutions for different raw materials and climates