Organic Fertilizer Granulator
In organic fertilizer production, granulation is the core process that converts powdered organic materials into granular products. Different raw material characteristics, capacity targets, and process requirements determine the selection of granulation equipment. OFEC offers three mainstream models – the drum granulator, disc granulator , roller Granulator – covering the full spectrum from small-scale trials to large-scale industrial organic fertilizer production.
Drum Granulator
The OFEC Drum Granulator is the core granulation equipment designed for large-scale organic fertilizer production. Using a wet agglomeration process, materials roll, tumble, and agglomerate into spherical pellets through the rotating motion of the drum.
Key Features:
● Single-unit capacity of 3–30 t/h, suitable for large-scale continuous production
● Granulation rate of 40%–60%, with high pellet roundness and compressive strength up to 25N
● Wide raw material adaptability – processes livestock manure, straw, biogas residue, and various organic materials
● High pellet strength – ideal for long-distance transport and long-term storage
● Supports complete integration with drying, cooling, and screening systems for fully automated production lines
Application Scenarios:
● Large-scale continuous production in large organic fertilizer plants
● Projects with annual output exceeding 100,000 tons
● Applications requiring high-strength pellets for long-distance transport
Applicable Materials: Fermented livestock manure, straw powder, humic acid, biogas residue, municipal sludge, and various other organic materials
Disc Granulator
The OFEC Disc Granulator is an economical granulation solution designed for small to medium-scale organic fertilizer projects. Using a wet agglomeration process, materials continuously tumble and agglomerate on an inclined rotating disc under the combined action of centrifugal force and friction.
Key Features:
● Single-unit capacity of 0.5–8 t/h, suitable for small to medium-scale production
● Granulation rate of 80%–95%, producing well-rounded, aesthetically pleasing spherical granules
● Simple structure with low investment cost and small footprint (approx. 5 m²)
● Intuitive operation – operable by 1–2 persons, easy maintenance
● Adjustable inclination and speed for flexible formula changeover
Application Scenarios:
● Small to medium-scale organic fertilizer plants and farm-based production
● Projects with annual output below 50,000 tons
● Applications requiring frequent formula changes and high pellet appearance quality
● Startups or small-scale investors with limited budgets
Applicable Materials: Fermented livestock manure, humic acid, bio-organic fertilizer, straw powder, biogas residue, etc.
Roller Granulator
The OFEC Roller Granulator is a granulation solution designed for high-moisture organic materials and energy-efficient production. Using a dry pressure granulation process, two counter-rotating high-pressure rollers compress powdered organic materials at ambient temperature.
Key Features:
● Single-unit capacity of 1–5 t/h, with multi-unit parallel expansion capability
● No drying or only low-temperature drying required – finished pellet moisture content of only 2%–5%, reducing overall energy consumption by 30%–50%
● Dense, high-strength pellets with a granulation rate exceeding 93%
● Dry process with zero wastewater, zero exhaust gas, and zero solid waste discharge
● Cold granulation process – microbial survival rate exceeding 90%, suitable for bio-organic fertilizer production
Application Scenarios:
● Regions with high energy costs or limited heat sources
● Applications requiring “no-dry pellet fertilizer” production
● Small to medium-scale processing plants and bio-organic fertilizer production
● Organic fertilizer projects with microbial activity requirements
Applicable Materials: Fermented livestock manure, humic acid, bio-organic fertilizer, straw powder, biogas residue, etc. Recommended moisture content ≤5%–10%.
Comparison of Two Granulator Types
Comparison Aspect | Drum Granulator | Disc Granulator | Roller Granulator |
Granulation Method | Wet agglomeration | Wet agglomeration | Dry pressure forming |
Single-Unit Capacity | 3–30 t/h | 0.5–8 t/h | 1–5 t/h (parallel configurable) |
Granulation Rate | 40%–60% | 80%–95% | >93% |
Pellet Shape | Spherical/oval, high strength | Spherical, well-rounded, aesthetically pleasing | Columnar/irregular, dense |
Pellet Strength | High (≥25N) | Moderate | High |
Raw Material Moisture Requirement | 25%–35% | 25%–35% | ≤5%–10% |
Drying Requirement | Requires drying system | Requires drying system | No drying or only low-temperature drying |
Energy Consumption | Higher | Moderate | Low (saves 30%–50%) |
Equipment Investment | High | Low | Moderate |
Footprint | Large | Small (approx. 5 m²) | Small (2–3 m²) |
Operation & Maintenance | Highly automated | Simple and intuitive | Easy and convenient |
Production Flexibility | Lower, suited for long-term fixed products | High, quick formula changeover | Moderate |
Microbial Survival Rate | Affected by drying heat | Affected by drying heat | >90% (cold granulation) |
Environmental Control | Closed system | Open system | Zero emissions, fully enclosed |
Applicable Scale | Large-scale (≥100,000 t/year) | Small to medium-scale (≤50,000 t/year) | Small to large-scale (parallel configurable) |
Dry pressure forming
Granulation Rate
40%–60%
>93%
Pellet Shape
Columnar/irregular, dense
Low (saves 30%–50%)
Moderate
Small (2–3 m²)
Easy and convenient
Moderate
>90% (cold granulation)
Zero emissions, fully enclosed
Small to large-scale (parallel configurable)
How to Choose the Right Granulator?
Choose the Drum Granulator if you
● Require large-scale, continuous production (annual output exceeding 100,000 tons)
● Have diverse raw material types with moderate moisture content (25%–35%)
● Have high requirements for pellet strength and storage/transport performance
● Have sufficient investment budget and factory space
Choose the Disc Granulator if you
● Have small to medium-scale production (annual output below 50,000 tons)
● Prioritize aesthetically pleasing, well-rounded pellet appearance for end-user markets
● Require frequent formula changes and flexible adjustment
● Have limited investment budget and want rapid production startup
Choose the Roller Granulator if you
● Have low raw material moisture content (≤10%) or want to eliminate the drying process
● Operate in regions with high energy costs or limited heat sources
● Produce bio-organic fertilizers requiring microbial activity preservation
● Want to reduce overall energy consumption and operating costs
For further evaluation of specific material characteristics and customized granulation solutions, please contact the OFEC technical team.
Resources
Three Technological Leaps from the “Manual Era” to a Multi-Billion Dollar Industry
In 2024, the global organic fertilizer granulator market was valued
When “No Drying Required” Changes the Economics of Organic Fertilizer Production
In organic fertilizer production, drying is the single largest energy
