Long-Life Processing and Filling Solutions for a Growing Beverage Category

Consumer demand for plant-based beverages continues to create opportunities for manufacturers of oat, soy, almond, rice, coconut, pea and blended drinks.

However, producing a commercially successful plant-based beverage requires more than mixing plant ingredients with water. The product must remain safe, stable and appealing throughout its declared shelf life.

A properly configured UHT processing and aseptic filling line can help manufacturers produce plant-based beverages with a long unopened shelf life under validated ambient-storage conditions.

USM—Used Sweden Machines can source and supply refurbished ingredient-preparation, processing, UHT, aseptic-storage, filling and downstream packaging equipment for plant-based beverage projects.

What Is a Plant-Based Beverage?

Plant-based beverages are liquid products prepared from plant materials such as:

• Oats
• Soybeans
• Almonds
• Cashews
• Rice
• Coconut
• Peas
• Hazelnuts
• Sesame
• Other grains, legumes, seeds and nuts
• Blends of two or more plant sources

The plant ingredient may be extracted directly from the raw material or introduced as flour, protein, concentrate, paste or prepared base.

The final formulation may also contain:

• Vegetable oil
• Sugar or other sweeteners
• Salt
• Stabilizers
• Emulsifiers
• Flavours
• Calcium
• Vitamins
• Minerals
• Fibre
• Protein ingredients

The exact recipe depends on the product’s nutritional target, taste, market position and local regulations.

Product Naming and Labelling

Plant-based beverage regulations differ between countries.

Manufacturers should verify whether terms traditionally associated with dairy products can be used in the intended market. In many cases, the plant source should be clearly identified in the product name, such as:

• Oat beverage
• Soy beverage
• Almond beverage
• Coconut beverage
• Rice beverage
• Plant-based drink

The FDA’s plant-based alternatives guidance page notes that nutritional composition varies according to the plant source, processing method and added ingredients. Product names and labels should clearly communicate the main plant source without misleading consumers about the product’s composition.

Allergen declarations are particularly important for beverages containing soy, almonds, cashews or other regulated allergens.

Why Use Aseptic Packaging?

Aseptic processing and packaging can provide plant-based beverages with a long unopened shelf life without continuous refrigeration, provided the product and process have been properly validated.

Potential benefits include:

• Wider domestic distribution
• Easier export shipment
• Reduced refrigerated-storage requirements
• Reduced cold-chain dependency
• Longer retail selling period
• Lower risk of expiry-related returns
• Convenient retail package sizes
• Protection from external contamination
• Efficient warehousing and transportation

Once opened, the product should be refrigerated and used according to the manufacturer’s instructions.

Most Plant-Based Beverages Are Low-Acid Products

Many unacidified plant-based beverages have a pH above 4.6 and must be treated as low-acid foods unless product-specific testing establishes otherwise.

Low-acid products require carefully validated commercial-sterility processes because bacterial spores may survive insufficient heat treatment and grow during ambient storage.

The Codex Code of Hygienic Practice for Aseptically Processed and Packaged Low-Acid Foods provides principles for producing a commercially sterile product, maintaining sterile conditions and filling it into sterilized, hermetically sealed packaging.

Thermal processing conditions must be developed for the actual formulation. A process used for one oat or soy beverage cannot automatically be applied to another product.

Complete Plant-Based Beverage Production Process

1. Raw-Material Receiving and Storage

Raw materials should be inspected for:

• Identity
• Moisture
• Microbiological condition
• Foreign material
• Insect contamination
• Oxidation
• Allergen status
• Supplier approval
• Shelf life
• Storage conditions

Nuts, grains and legumes may require controlled dry storage, temperature monitoring and pest management.

2. Cleaning, Soaking and Preparation

When whole plant materials are used, the process may include:

• Cleaning
• Sorting
• Dehulling
• Soaking
• Blanching
• Grinding
• Wet milling
• Enzyme treatment
• Extraction
• Separation
• Filtration

The process differs substantially by plant source.

Soy may require soaking, grinding and treatment to control undesirable flavours and anti-nutritional factors. Oat and rice beverages may use enzyme treatment to control starch breakdown, sweetness and viscosity. Nut beverages require fine grinding, extraction and careful oxidation control.

3. Extraction and Filtration

The plant material is mixed with treated water and mechanically processed to release protein, fat, carbohydrates and flavour components.

The extraction system may include:

• Wet mills
• Colloid mills
• High-shear mixers
• Decanters
• Centrifugal separators
• Filters
• Screens
• Refiners

Filtration must balance smooth mouthfeel against the desired fibre and solids content.

Insufficient filtration can create:

• Gritty texture
• Sedimentation
• Blocked valves
• Heat-exchanger fouling
• Filling difficulties

Excessive filtration can reduce yield, fibre and body.

4. Formulation and Standardization

The extracted base is adjusted to achieve the required:

• Plant content
• Protein
• Fat
• Total solids
• Viscosity
• Sweetness
• Flavour
• Colour
• Nutritional composition

Accurate dosing is especially important for vitamins and minerals. Calcium salts and other minerals can interact with plant proteins and affect heat stability.

5. Stabilization and Emulsification

Plant-based beverages may contain suspended particles, proteins and oil droplets that naturally separate during storage.

A suitable stabilization system may help control:

• Sedimentation
• Creaming
• Oil separation
• Protein aggregation
• Viscosity
• Mouthfeel
• Heat stability

The type and quantity of stabilizer or emulsifier must comply with local regulations and be validated for the formulation.

6. Deaeration

Air can enter during grinding, mixing and pumping.

Excessive oxygen may cause:

• Oxidized flavour
• Nutrient degradation
• Colour changes
• Foaming
• Reduced shelf-life quality

Vacuum deaeration can reduce entrained and dissolved air before homogenization and heat treatment.

7. Homogenization

Homogenization reduces particle and fat-droplet size, supporting a smoother and more stable beverage.

Correct homogenization can improve:

• Emulsion stability
• Suspension
• Mouthfeel
• Visual uniformity
• Flavour distribution
• Shelf-life performance

Excessive pressure may damage proteins, increase viscosity or accelerate fouling. Insufficient homogenization may allow separation.

Pressure, temperature and number of stages must be optimized for each recipe.

8. UHT Treatment

The beverage receives a validated UHT treatment to achieve commercial sterility.

The system may use:

• Direct steam heating
• Indirect plate heating
• Indirect tubular heating
• Other product-appropriate heat exchangers

Equipment selection depends on:

• Protein content
• Starch content
• Viscosity
• Fibre
• Particle size
• Heat sensitivity
• Fouling behaviour
• Required production capacity

The process must control microorganisms while minimizing:

• Cooked flavour
• Protein precipitation
• Browning
• Nutrient loss
• Excessive viscosity
• Separation
• Heat-exchanger fouling

9. Aseptic Buffer Storage

An aseptic tank can balance the UHT system and filling machine while maintaining sterile product conditions.

It can reduce product loss during short filler interruptions and provide stable flow to the filling machine.

The tank, sterile-air system, valves, pipelines and instruments must be cleaned, sterilized and monitored as one aseptic system.

10. Aseptic Filling

The commercially sterile beverage is filled into sterilized packaging material and hermetically sealed.

The filling process must ensure:

• Sterile packaging-material treatment
• Controlled aseptic conditions
• Accurate filling volume
• Reliable package seals
• Correct package formation
• Batch coding
• Production traceability
• Package-integrity control

Possible package volumes include:

• 125 ml
• 200 ml
• 250 ml
• 330 ml
• 500 ml
• 1,000 ml

11. Secondary Packaging

The line may also include:

• Straw applicators
• Reclosable-cap applicators
• Conveyors
• Accumulators
• Package inspection
• Tray packers
• Case packers
• Shrink-wrapping equipment
• Palletizing systems

Important Quality-Control Tests

Testing may include:

• pH
• Brix or total soluble solids
• Protein
• Fat
• Total solids
• Viscosity
• Particle-size distribution
• Sedimentation
• Creaming
• Heat stability
• Oxidative stability
• Nutritional composition
• Allergen controls
• Commercial sterility
• Package integrity
• Sensory performance
• Real-time shelf-life trials

Common Production Problems

Sedimentation

Possible causes include coarse particles, insufficient stabilization, unsuitable mineral balance or incomplete homogenization.

Oil Separation

This may result from poor emulsification, an unsuitable oil phase or inadequate homogenization.

Excessive Viscosity

Possible causes include uncontrolled enzyme activity, excessive stabilizer, starch interaction or heat damage.

Gritty Mouthfeel

This can result from coarse milling, poor filtration, protein aggregation or mineral precipitation.

Cooked or Beany Flavour

Raw-material selection, enzyme activity, processing temperature and heat load can all affect flavour.

UHT Fouling

Protein, starch, minerals and insoluble solids may deposit on heat-transfer surfaces, reducing production time and thermal efficiency.

Package Swelling

Swelling may indicate microbial growth, inadequate processing, post-process contamination or package failure. Affected production must be isolated and investigated.

Equipment Available Through USM

USM can source refurbished equipment for:

Raw-Material Preparation

• Soaking and preparation tanks
• Wet mills
• Colloid mills
• High-shear mixers
• Extraction systems
• Decanters and separators
• Filters and strainers

Processing

• Blending tanks
• Ingredient-dosing units
• Enzyme-treatment systems
• Deaerators
• Homogenizers
• UHT plants
• Aseptic tanks
• Cleaning-in-place systems

Filling and Packaging

• Refurbished aseptic carton filling machines
• Straw and closure applicators
• Conveyors and accumulators
• Coding and inspection equipment
• Tray, shrink and case packers
• Palletizing systems

Information Required for a Proposal

USM normally requires:

1. Plant source
2. Product formulation
3. Protein, fat and solids targets
4. pH and viscosity
5. Fibre or particle content
6. Required shelf life
7. Package size and format
8. Required production capacity
9. Existing processing equipment
10. Available utilities
11. Destination country
12. Required installation scope
13. Target budget and project timing

Build Your Plant-Based Beverage Line with USM

A successful plant-based beverage requires correct extraction, formulation, homogenization, UHT treatment and aseptic filling.

Share your product, package size and required capacity with USM. Our team can help identify suitable refurbished processing and aseptic filling equipment.

USM — Used Sweden Machines

Flexible Processing. Aseptic Filling. Global Solutions.

Technical note: Product formulation, allergen controls, heat treatment, commercial sterility, labelling and shelf life must be validated by qualified food technologists, microbiologists and regulatory specialists.