Pellet Mill vs Extrusion Line

When pelleting is the right feed process and when extrusion is unavoidable: poultry, fish and shrimp requirements, floating vs sinking feed, micro-pellets, energy, CAPEX and OPEX comparison.

Short answer · reviewed September 2026

Should the project use a pellet mill or an extrusion line?

Use pelleting when the product range is mash, pellets and crumbles for poultry, swine or ruminants. Use extrusion when the product must float, carry high fat inclusion, hold water stability or be produced as micro-pellets — typically fish and shrimp feed. Extrusion costs substantially more in CAPEX and drying energy, so the product specification, not the equipment preference, should decide.

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When pelleting makes sense

Poultry, swine and ruminant feed in mash, pellet and crumble form
Sinking products where water stability is not a requirement
Lower capital budget and simpler thermal infrastructure
High tonnage of a limited number of recipes

When extrusion makes sense

Floating or slow-sinking aquafeed
High fat inclusion beyond what pelleting tolerates
Micro-pellets for shrimp and fish fry
Higher starch gelatinisation and digestibility requirements

Poultry feed requirements

Pelleting with crumbling for starter phases is standard. The commercial priorities are pellet durability at the feeder, throughput per recipe and consistent particle size after grinding.

Fish feed requirements

Extrusion with drying and coating, across several pellet diameters as fish grow. Buoyancy control and oil absorption capacity are the defining process requirements.

Shrimp feed requirements

Ultra-fine grinding, micro-pellet forming and water stability over extended immersion. Shrimp feed is the most demanding common product on both grinding and dosing accuracy.

Floating vs sinking feed

Floating vs sinking feed — reviewed September 2026 by FeedMatch Group
Property	Floating (extruded)	Sinking (extruded or pelleted)
Process	Extrusion with expansion control	Extrusion at low expansion, or pelleting
Feeding observation	Intake visible at the surface	Intake not directly observable
Typical species	Tilapia, catfish, carp (surface feeders)	Shrimp, bottom feeders, some marine species
Energy per tonne	Higher (drying)	Lower to moderate

Micro-pellets

Micro-pellets require fine grinding, precise forming and gentle handling to limit fines. Both extrusion and specialised pelleting routes exist; the choice depends on target diameter, water stability and volume.

Energy use

Pelleting consumes steam for conditioning and electrical energy at the pellet mill. Extrusion adds preconditioning steam, extruder motor load and a dryer that is usually the largest thermal consumer in the plant.

CAPEX comparison

CAPEX comparison — reviewed September 2026 by FeedMatch Group
Item	Pellet line	Extrusion line
Grinding	Standard hammer mill	Fine or ultra-fine grinding
Thermal processing	Conditioner + pellet mill	Preconditioner + extruder
Drying	Not required	Dryer required — major capital item
Coating	Optional post-pellet liquid application	Vacuum or atmospheric coater
Relative capital cost	Lower	Substantially higher

OPEX comparison

OPEX comparison — reviewed September 2026 by FeedMatch Group
Cost line	Pellet line	Extrusion line
Electrical energy per tonne	Moderate	Higher
Thermal energy per tonne	Conditioning steam	Conditioning plus drying — dominant
Wear parts	Dies, rollers	Screws, inserts, dies, knives
Operator skill requirement	Moderate	High

Product quality comparison

Pelleting is judged on durability and fines; extrusion is judged on buoyancy control, water stability, oil retention and uniform moisture after drying. Each requires a different quality control setup.

Supplier selection checklist

Guaranteed capacity for each product family, not an average
Dryer sizing basis and moisture uniformity commitment (extrusion)
Durability or water stability guarantee with a named test method
Energy consumption per tonne at guaranteed capacity
Wear part cost over two years

Related calculators

Planning estimators only. They are not financial advice, engineering design or nutrition advice, and final numbers require supplier, engineering, nutritionist and local regulatory review.

FAQ

What is the difference between pelleting and extrusion?

Pelleting conditions and compresses mash through a die at moderate temperature and is standard for poultry, swine and ruminant feed. Extrusion cooks the mash under higher temperature, moisture and shear, expands it and allows floating feed, high fat inclusion, micro-pellets and improved water stability — at higher CAPEX, higher energy use and a drying step.

What equipment is needed for aquafeed production?

Typically fine grinding, batching and mixing, a preconditioner, a single- or twin-screw extruder, a dryer, a vacuum or atmospheric coater for oil and heat-sensitive additives, a cooler, sizing and packing — plus the utilities and thermal capacity the dryer and preconditioner require.

What equipment is needed for shrimp feed production?

Shrimp feed usually requires ultra-fine grinding, accurate micro-ingredient dosing, a preconditioner and extruder or pellet line configured for micro-pellets, careful drying, coating and a water-stability testing capability, because feed must remain intact in water for extended periods.

What affects feed mill CAPEX?

Feed mill CAPEX depends on feed type, target capacity, raw material handling, grinding, batching, mixing, pelleting or extrusion, drying, cooling, coating, packaging, automation, additive dosing, storage, laboratory needs, utilities, civil works and local regulatory requirements.

What affects feed mill OPEX?

Raw material cost dominates, typically followed by energy, labour, maintenance and spare parts, additives and premix, packaging and logistics, quality control, formula changes and — critically — actual production utilisation against installed capacity.

Start a human-reviewed RFQ

Request a human-reviewed feed mill project quote. Submit your feed type, target capacity, country, raw materials, process type, automation needs, budget range and timeline. FeedMatch will review the brief before approaching suitable suppliers or project partners.

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More in this guide series

FeedMatch Group is an independent animal feed project sourcing and RFQ platform. We are not a feed producer, equipment manufacturer, EPC contractor, farm, nutritionist, lender, broker-dealer, investment advisor or financial advisor. Supplier and project partner outreach is handled only after a commercial project brief is reviewed.