Quality control measures for bio-organic fertilizer production lines

In today's competitive organic fertilizer market, quality control in the bio-organic fertilizer production line is crucial for product effectiveness and market competitiveness. Strict control is needed at every stage, from raw material handling to finished product shipping.

1.Preprocessing Control

Raw Material Testing: Test livestock manure for heavy metals (lead, arsenic, cadmium, etc.) to meet standards.

Moisture Adjustment: Keep initial moisture content between 50%-60%. Add straw or rice husks if too high; spray bacterial solution if too low.

Impurity Removal: Use trommel screens to remove plastics, stones, and other foreign objects. Impurity content must be <3%.

2.Fermentation Management

Temperature Monitoring: Use IoT temperature probes to ensure piles stay at 55-65°C for 7-15 days (kills pathogens).

Timely Turning: Use compost turning machines every 48 hours. Keep oxygen concentration between 5%-15%.

Maturity Check: After fermentation, test pH (6.5-8.5) and seed germination index (>80%).

3.Granulation Control

Disc Granulator Settings: Set disc angle to 45-55° and rotation speed to 8-12 rpm. Control particle size at 3-5mm.

Binder Addition: Add ≤5% humic acid or starch-based binder to avoid harming microbial activity.

Low-Temperature Drying: Keep drying temperature ≤80°C to preserve active live bacteria count (≥200 million CFU/g).

4.Finished Product Testing

Multi-Stage Screening: Use vibrating and rotary screens together to ensure >90% particle qualification rate.

Quality Tests: Check each batch for organic matter (≥30%), total nutrients (≥4%), and moisture (≤30%).

Moisture-Proof Packaging: Seal in woven bags with PE film liners. Label with strain names and active live bacteria count.

Implementing full-process quality control in bio-organic fertilizer production ensures consistent output of high-standard fertilizer and boosts business competitiveness.