Complete Chicken Manure Fertilizer Production Line: From Waste to Organic Fertilizer

Introduction

Poultry farming generates significant amounts of manure that, if left untreated, poses environmental challenges. However, with the right organic fertilizer equipment, chicken manure can be transformed into a valuable agricultural product. A chicken manure fertilizer production line converts raw poultry waste into nutrient-rich organic fertilizer through a series of controlled processes. This article outlines the complete production system, from initial composting to final packaging, providing a technical overview for operations considering this sustainable investment.

Stage 1: Raw Material Preparation and Fermentation

Composting the Raw Manure

Fresh chicken manure typically contains 60–75% moisture and high levels of uric acid and pathogens. The first step in any fertilizer making machine line is aerobic fermentation. A compost turner (either self-propelled or hydraulic) regularly turns the windrows, introducing oxygen and accelerating microbial activity. During this 20–25 day process, internal temperatures reach 60–70°C, effectively eliminating weed seeds and harmful bacteria. Proper fermentation ensures the material is stable and safe for subsequent processing.

Moisture Management

If the composted material exceeds 25% moisture, pre-drying may be required before granulation. Some operations utilize a solid-liquid separator to reduce moisture content to optimal levels.

Stage 2: Crushing and Pre-Granulation Processing

Size Reduction

After fermentation, the composted material may contain lumps and agglomerates. A vertical chain crusher or double-shaft horizontal crusher reduces these materials to a fine, uniform powder (typically 40 mesh or finer). This step is critical because uniform particle size directly affects granulation quality and consistency. The crusher should handle materials with moisture content up to 40% without clogging.

Mixing for Formulation

For blended organic fertilizers, a horizontal or vertical mixer combines the composted manure with supplementary nutrients or organic additives. This ensures every granule contains a homogeneous nutrient profile.

Stage 3: Granulation – The Core of the Production Line

The granulation stage is where the manure pellet machine transforms powder into uniform, easy-to-handle granules. Several organic fertilizer granulator options exist, depending on production scale and product requirements.

Extrusion Granulation

A double roller press granulator compacts the material under high pressure (20–80 MPa) without adding moisture. This dry process produces dense, irregular granules with diameters of 3–10 mm. Models such as the TDJZ series offer capacities from 1–3 tons/hour with motor power ranging from 15–37 kW. Key advantages include no drying requirement and energy consumption reduction of 30–40% compared to wet methods.

Disc Granulation

For spherical granules preferred in consumer markets, a disc (pan) granulator utilizes a rotating inclined pan (35–55° angle) and liquid binder spray to form rounded pellets through tumbling action. This method achieves balling rates above 95% and produces uniform 1–6 mm granules.

Drum Granulation

Large-scale operations (5–30 tons/hour) often employ rotary drum granulators. These continuous systems use internal lifters to cascade material while binders are sprayed, promoting particle growth through layering. Drums are typically 1–3 meters in diameter with lengths 4–12 times the diameter, rotating at 8–15 rpm.

Stage 4: Drying, Cooling, and Screening

Drying

Fresh granules from wet granulation contain 15–30% moisture and require drying for stable storage. Rotary drum dryers use hot air (80–120°C inlet temperature) to reduce moisture to below 15%. The tumbling action during drying also polishes the granules, improving their spherical shape.

Cooling

After drying, granules enter a rotary cooler where ambient or chilled air reduces their temperature to near-ambient levels. This prevents caking during storage and protects downstream equipment from heat damage.

Screening

A multi-deck vibratory or rotary screener separates the granulated material:

• On-size product (typically 2–4 mm) proceeds to coating/packaging

• Oversize particles are crushed and returned to the process

• Undersize fines are recycled back to the granulator feed

Stage 5: Coating and Packaging

Optional Coating

A coating drum applies anti-caking agents or moisture barriers to the finished granules, enhancing shelf life and handling characteristics. The tumbling action ensures uniform coating distribution.

Automated Packaging

The final fertilizer making machine in the line is the automatic packaging scale. These systems weigh and fill bags (typically 20–50 kg) at speeds of 6–10 bags per minute with ±0.5% accuracy. Fully integrated lines include bag sealing and palletizing equipment.

Conclusion

A complete chicken manure fertilizer production line transforms an environmental liability into a marketable asset. From initial composting through granulation to final packaging, each stage requires careful equipment selection matched to raw material characteristics and production targets. Whether utilizing a manure pellet machine for dry extrusion or a drum granulator for high-volume wet processing, modern organic fertilizer equipment delivers consistent, high-quality results. Contact our engineering team to discuss your specific capacity requirements and raw material analysis for a customized line design.