Compost-Based Granular Organic Fertilizer: Advancing Sustainable Agriculture

As agriculture continuously seeks environmentally friendly and efficient solutions, compost-based granular organic fertilizers have become the cornerstone of sustainable agriculture. Although natural compost has long been recognized for its ability to enhance soil fertility, its large volume and uneven texture make it difficult to be widely applied. The solution lies in compost-based granular organic fertilizers - a processed form of compost, which is stable, uniform, and easier to apply. 

This type of fertilizer combines the natural advantages of compost with the practicality of granular fertilizers produced by specialized machinery. Farmers can not only improve soil health but also store, transport and apply fertilizers precisely in a convenient manner.

What Is Compost-Based Granular Organic Fertilizer?

Compost-based granular organic fertilizer is produced by converting organic waste materials—such as crop residues, animal manure, and food scraps—into mature compost, which is then processed into granules. These granules retain the biological activity and nutrients of compost while offering improved handling and longer shelf life.

Compared to raw compost, the granulated version:

  • Has reduced moisture content.

  • Provides consistent nutrient concentration.

  • Can be easily spread using modern applicators.

  • Has better market acceptance in both domestic and export markets.

Compost-based granular organic fertilizer

Production Process of Compost-Based Granular Organic Fertilizer

The production of compost-based granular organic fertilizer follows a systematic workflow supported by specialized equipment. Each step ensures that organic residues are efficiently converted into stable, high-quality fertilizer granules.

  1. Raw Material Collection and Pretreatment

    • Materials such as crop residues, livestock manure, and food waste are collected.

    • Crushing machines break down bulky materials, while horizontal mixers or double-shaft mixers ensure a balanced C/N ratio and uniformity before composting.

  2. Composting Stage

    • Pretreated materials are arranged into piles and fermented using a crawler type compost turner or wheel type compost turner. These machines introduce oxygen, regulate moisture, and maintain temperature for aerobic fermentation.

    • For smaller spaces or faster processing, an in-vessel fermentation tank can be used to achieve hygienic, odor-free composting.

  3. Maturation

    • Over 20–40 days, organic matter decomposes into stable compost enriched with humic substances and beneficial microbes.

  4. Granulation

    • Mature compost is processed using a stirring pin granulator (suitable for bio-organic fertilizers), a disc granulator, or a double roller granulator, depending on the desired granule shape and strength.

    • The granulator ensures that compost particles are bound into uniform, durable granules.

  5. Drying and Cooling

    • Fresh granules contain high moisture. A rotary drum dryer reduces the moisture level, while a rotary drum cooler hardens and stabilizes the granules, preventing caking during storage.

  6. Screening and Polishing

    • A rotary screener separates oversized and undersized particles. Oversized granules are crushed and recycled, while fine powders are returned to the granulator.

    • A polishing machine can further refine the granules, improving their roundness and market appeal.

  7. Final Packaging

    • Qualified compost-based granules are weighed and bagged using automatic packing machines, ensuring precision and efficiency for commercial distribution.

Case Example: European Organic Farms

In Europe, small and medium-sized organic farms have embraced compost-based granular organic fertilizer as a certified input. By relying on granulated compost, farms maintain compliance with organic standards while ensuring soil fertility and reducing external input costs. The consistent quality of granules also supports export markets, especially for high-value crops like grapes, olives, and vegetables.

LANE’s Contribution to Compost-Based Fertilizer Production

LANE provides advanced machinery and complete solutions for transforming compost into market-ready granules.

  • Fermentation Equipment: Windrow compost turners and in-vessel composting units ensure fast and hygienic decomposition.

  • Granulation Systems: Multiple options (rotary drum, pan, double roller granulators) tailored to client needs.

  • Drying & Cooling: Reliable rotary dryers and coolers for moisture control and granule stability.

  • Screening & Packing: Automated systems guarantee uniform granule size and efficient packaging.

  • Turnkey Projects: LANE delivers end-to-end services including plant design, equipment installation, and operator training.

By integrating biological processes with industrial technology, LANE enables farms, cooperatives, and industries to scale up production of compost-based granular organic fertilizer efficiently and sustainably.

The transition from raw compost to compost-based granular organic fertilizers represents the modernization of sustainable agriculture. By converting waste into structured and nutrient-rich granules, farmers and enterprises can obtain practical, profitable and environmentally friendly products. 

By integrating advanced equipment, composting is no longer merely a by-product but a valuable input for large-scale agriculture. LANE's expertise in designing and delivering complete production lines ensures that composting projects can break through traditional boundaries and create lasting benefits for soil health, crop yields, and environmental sustainability.

For more details, please feel free to contact us.

Henan Lane Heavy Industry Machinery Technology Co., Ltd.

Email: sales@lanesvc.com

Contact number: +86 13526470520

Whatsapp: +86 13526470520

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