Composted organic matter
Manure or waste compost, screened and matured. Its moisture and ash content drive the dryer load.
01 · Complete production solution
Organic-Inorganic Compound Fertilizer Line
Two feed streams, one granule: pre-treated organic matter and mineral nutrients combined so the product carries both organic matter and a declared NPK guarantee.
02
Quick answer
What this line is
The engineering problem is the mismatch between the two streams: organic material arrives wet and variable, mineral salts arrive dry and precise. The line has to dry the first without over-heating it and dose the second without losing accuracy.
The organic stream sets the moisture and the mineral stream sets the analysis; granulation has to satisfy both at once.
03
Inputs
Suitable raw materials
The organic share is usually fixed by the product standard, which means the mineral share and the filler budget are decided by subtraction.
Urea and ammonium salts
Nitrogen sources; heat-sensitive, so drying temperature is capped by them as well as by the organic fraction.
MAP / DAP
Phosphorus sources with nitrogen carry-over that must be counted in the formula.
Potash
KCl or K2SO4, chosen by crop and chloride restriction.
Binder
Bentonite or lignin where the organic fraction weakens the granule.
04
Output
Target finished product
Two guarantees on the same bag. Both must hold, and the second is limited by the first.
Organic matter content
Declared as a percentage, verified by the reference method for the target market.
NPK guarantee
Calculated around the nutrients already present in the organic fraction, not added on top of them.
Granule strength
The organic fraction tends to soften the granule; binder and moisture control compensate.
Moisture & caking
Organic matter holds water, so cooling and coating matter more than on a pure mineral line.
05
Production sequence
Process flow
Eight stages. The first exists only because the organic stream cannot be fed straight into a mineral batching system.
| Stage | Purpose | Key equipment | Control point |
|---|---|---|---|
| 1. Organic pre-treatment | Screen, crush and dry the organic fraction to a stable feed | Crusher, screener, dryer | Moisture at the batching hopper |
| 2. Batching | Weigh organic and mineral components to recipe | Automatic batching machine | Two-stream accuracy |
| 3. Mixing | Homogenise before granulation | Double-shaft mixer | Residence time |
| 4. Granulation | Form the granule | Rotary drum or double roller | Moisture and binder |
| 5. Drying | Bring the granule to spec moisture | Rotary drum dryer | Temperature cap for urea |
| 6–8. Screening, coating, packing | Size, protect, bag | Screener, coating drum, packing machine | Oversize recycle |
Why this order: drying the organic fraction twice — once before batching and once after granulation — is the cost of combining the streams. Skipping the first pass pushes the variability into the granulator, where it cannot be corrected.
06
Equipment
Equipment configuration
Typical equipment scope for this route. Final selection follows the approved mass balance and site conditions.
Organic pre-treatment
Vertical Crusher
Two-stream dosing
Automatic Batching Machine
Mixing
Double-Shaft Mixer
Granulation
Rotary Drum Granulator
Drying
Rotary Drum Dryer
Screening
Rotary Drum Screener
07
Capacity
Capacity bands
Bands describe typical project scale; the actual figure is confirmed by mass balance, not by a nominal model number.
Single train, organic fraction pre-dried in batches.
Continuous pre-treatment, parallel granulators, automatic bagging.
Multi-line plant with separate organic and mineral storage.
08
Operation
Utility requirements
Basis for the utility sheet. Local voltage, fuel and water quality are confirmed during engineering.
Power
Two crushing and drying duties push the load above a pure mineral line.
Fuel
Two drying duties: organic pre-treatment and final granule drying.
Steam
Where drum granulation is used; not required for roller compaction.
Water
Process water for granulation, balanced against the organic moisture.
Dust collection
Organic dust is fibrous and clogs filters faster than mineral dust; size accordingly.
Storage
Separate dry bays for mineral raw materials and covered bays for organic feed.
09
Quality
Quality control points
Controls that decide whether the line holds its specification in daily operation.
Organic matter assay
Measured on the feed, not assumed from the supplier certificate.
Nutrient credit from organic fraction
The most common formula error is double-counting it.
Moisture at granulation
Two streams, one target; the mixer discharge is the control point.
Granule durability
Organic-rich granules fail earlier in handling; test at bagging.
10
FAQ
Questions buyers ask
Straight answers on scope, limits and what we need to quote.
What organic matter share can the line handle?
It follows the product standard and the granule strength you need. Above roughly 30 percent organic matter, binder selection becomes the limiting design decision.
Can we use fresh manure?
No. The organic fraction must be composted and matured first, otherwise the bag reheats and the nutrient guarantee is unreliable.
Drum or roller granulation?
Drum suits higher organic shares and rounder granules; roller compaction suits drier mixes and higher output with less drying.
How is the NPK guarantee calculated?
From the mineral inputs plus the credited nutrients in the organic fraction, then verified by assay on the finished granule.
Can we run pure mineral formulas on the same line?
Yes, by bypassing the organic pre-treatment. The batching recipe and dryer setpoints change; the equipment does not.
What do you need to quote?
Organic matter source and assay, target organic percentage, NPK guarantee, output and site utilities.
11
Next step
Request a project review
Send material, capacity and site constraints; the engineering team replies with a route recommendation.
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