Guide to “Mining Gold” from Cow Dung: How Production Lines Create Profitable Fertilizer
In traditional views, cow dung was merely agricultural waste. But with modern agricultural technology, it has transformed into valuable “black gold.” A complete cow dung organic fertilizer production line not only solves livestock pollution problems but also creates remarkable economic value. This article will take you deep into this modern production line that “turns dung into gold.”
I. Six-Step Transformation: From Cow Dung to Premium Organic Fertilizer
1. Intelligent Collection System
Modern cow dung collection has moved beyond traditional shoveling methods, adopting automated scraping systems + sealed transport vehicles to complete transfer from barns to processing plants within 24 hours, maximizing retention of nutrients like nitrogen, phosphorus, and potassium (reducing nitrogen loss by over 60%). Key points:
- Use leak-proof collection pools to prevent nutrient loss from rainwater
- GPS-equipped transport vehicles for real-time monitoring of raw material freshness
- Quick testing of moisture content (controlled at 70-75%) and pH (6.5-7.5)
2. Precise Solid-Liquid Separation
Using screw press separators with up to 95% separation efficiency:
| Separation Product | Nutrient Content | Subsequent Use |
| Solid portion | 60-70% organic matter, rich cellulose | Main material for composting |
| Liquid portion | 2-4% nitrogen, 1.5-3% potassium | Liquid fertilizer or biogas raw material |
3. Efficient Composting Process
Using trough aerobic fermentation systems to complete in 7 days what traditionally took 30 days:
- Add composite microbial agents (Bacillus:Actinomyces:Yeast = 5:3:2)
- Intelligent control system maintains temperature at 55-65°C (killing pathogens)
- Automatic turning machine flips piles every 8 hours
II. Core Technologies: The Secret Weapon That Increases Cow Dung Value 5-Fold
| Technology | Traditional Method | Modern Process | Efficiency Improvement |
| Fermentation Control | Natural composting | PLC automatic temperature/oxygen control | Time reduced by 70% |
| Granulation | Manual pelletizing | Steam-conditioned granulation | Pelletization rate ≥95% |
| Drying System | Sun drying | Counter-flow dryer | Energy consumption reduced by 40% |
III. Product Value: The Leap from “Sold by Ton” to “Sold by Gram”
- Premium organic fertilizer: Organic matter ≥45%, price 800-1200 yuan/ton
- Bio-organic fertilizer: Added functional bacteria (≥0.2 billion/g), price 1500-2000 yuan/ton
- Custom formula fertilizer: For specific crops (like tea, medicinal herbs), price up to 3000 yuan/ton
IV. Win-Win for Environment and Economy: Multiple Benefits of a Production Line
Example of a medium-sized production line processing 10,000 tons of cow dung annually:
- Direct output value: ~8 million yuan/year
- Environmental subsidies: 500,000-1 million yuan/year (varies by region)
- Carbon emission reduction income: 200,000-300,000 yuan/year (CCER trading)
- Saved pollution discharge fees: ~150,000 yuan/year
Organic Fertilizer Production Line
Equipment Composition
- Pre-processing equipment:Crushers and screens for breaking down organic waste and removing impurities.
- Fermentation equipment:Composting turntables and fermentation tanks for converting organic waste into stable organic matter while eliminating pathogens.
- Compost turners:For regular turning to provide oxygen and accelerate fermentation.
- Granulation equipment:Disc or drum granulators for forming fermented material into granules.
- Drying equipment:Rotary drum dryers for removing excess moisture.
- Cooling equipment:For cooling granules to prevent quality issues.
- Screening equipment:For ensuring consistent granule size.
- Coating equipment (optional):For moisture-proof coatings.
- Packaging equipment:Automatic packers.
- Control system:PLC systems for monitoring key parameters.
Application Scenarios
Ideal for livestock farm waste treatment, municipal sludge recycling, and green organic farming, especially in facility agriculture, orchards, tea plantations, and high-value cash crop areas. Organic fertilizer improves soil structure and water/nutrient retention, supporting sustainable agriculture.