Can plastic washing systems be used for paint pot recycling?

Yes. Plastic washing systems can clean shredded paint pots and paint containers by removing dried paint residues, labels and other contamination.

March 11, 2026March 11, 2026

How to Remove Oil, Grease & Organic Contamination

Industrial Plastic Washing Systems for Contaminated Plastic Recycling

Plastic recycling facilities increasingly face a major challenge: contamination in plastic waste streams.

Plastic materials recovered from food processing, waste packaging, anaerobic digestion plants, paint container recycling and industrial processes often contain oils, fats, food residues, labels, adhesives and organic contamination.

Without effective cleaning, these contaminants can make plastic difficult to process, impossible to pelletise and unsuitable for reuse in manufacturing.

Modern plastic washing systems are therefore critical to transforming contaminated plastic waste into clean, recyclable raw material.

Rotajet Systems Ltd designs and manufactures industrial plastic washing machinery in the UK, engineered to remove heavy contamination and improve plastic recyclability for recycling plants worldwide.

Learn more about industrial plastic washing equipment here:
https://plasticwashing.co.uk

The Challenge of Contaminated Plastic Recycling

Plastic recyclers rarely receive clean feedstock.

Most post-consumer and post-industrial plastics arrive contaminated with substances that must be removed before recycling can occur.

Typical contamination sources include:

• Waste cooking oil residues
• Food contamination
• Organic residues from depackaging plants
• Paint and coating residues
• Adhesives and labels
• Oils and lubricants from industrial packaging
• Dirt and organic debris

Industry groups such as Plastics Recyclers Europe highlight contamination as one of the largest barriers to improving recycling rates across Europe.

These contaminants reduce the value of recycled plastic and create serious operational challenges during recycling.

Common processing issues include:

• Poor extrusion quality
• Pellet contamination
• Odour problems
• Reduced melt flow performance
• Blocked extrusion filters
• Increased maintenance and downtime

For many recycling plants, plastic washing systems are essential before extrusion or pelletising can take place.

Why Plastic Washing Systems Are Essential in Recycling Plants

Plastic washing systems perform several critical roles within modern recycling operations.

They help to:

• Remove oils and organic contamination
• Separate dirt and debris from plastic flakes
• Improve recyclate purity
• Reduce odours in recycled plastics
• Improve downstream extrusion performance
• Increase the value of recycled plastic pellets

Research from the Waste and Resources Action Programme shows that improving contamination removal significantly increases the value of recycled plastics.

Types of Plastic Washing Technologies

Plastic recycling plants typically use multiple washing stages depending on the level of contamination and material type.

Drum Washing Systems

Drum washing systems are typically used for light contamination removal, particularly when processing plastic containers, packaging and industrial drums before shredding.

For example, container washing equipment such as the Rotajet container washer can remove surface contamination before plastic size reduction.

Learn more:
https://drumwashing.com/container-washer-rj-cw-9-25/

These machines are often installed alongside plastic recycling washing lines supplied by Rotajet.

Sink Float Separation Systems

Sink-float tanks separate plastics based on density differences.

Polyolefins such as HDPE, LDPE and polypropylene float, while heavier contaminants sink.

This stage is widely used in recycling plants handling mixed plastic waste streams.

Rotajet sink-float separation equipment can be integrated into plastic recycling washing lines.

More information:
https://plasticwashing.co.uk

High-Speed Friction Washing

For heavily contaminated plastics, high-speed friction washing systems provide the most effective cleaning solution.

These machines generate intense mechanical friction to remove:

• Oils and grease
• Food contamination
• Paint residues
• Adhesives and labels
• Organic contamination

High-speed friction washing is commonly used in recycling facilities processing plastics from food packaging, waste management operations and anaerobic digestion plants.

High-Speed Friction Washing Technology

The Rotajet RJ-Turbo friction washer is designed to remove heavy contamination from shredded plastics and plastic regrind.

More details:
https://plasticwashing.co.uk/plastic-washer/

The system uses a high-speed rotor inside a perforated screen basket, creating friction between plastic particles.

During operation:

Contaminated plastic enters the washing chamber
A high-speed rotor accelerates the plastic particles
Plastic flakes rub together creating friction
Contamination is dislodged from the plastic surface
Water flushes contaminants through the basket
Clean plastic exits the machine ready for further processing

This friction washing process removes oils, fats and organic contamination from plastic waste streams, significantly improving recyclability.

Example Plastic Washing Line Layout

A typical plastic recycling washing line may include:

Material feed hopper
→ Shredder
→ Granulator
→ Rotajet friction washer
→ Sink-float tank
→ Secondary washing stage
→ Mechanical dewatering dryer
→ Material storage silos

Rotajet designs complete plastic washing plants as well as individual machines that can integrate into existing recycling facilities.

Full system overview:
https://plasticwashing.co.uk

Retrofit Plastic Washing Systems into Existing Recycling Plants

Many recycling facilities already operate shredders, granulators or extrusion equipment but struggle with contamination problems.

Rotajet plastic washing systems can be retrofitted into existing recycling plants to improve cleaning performance without replacing the full recycling line.

Typical retrofit upgrades include:

• Installing friction washers
• Adding sink-float separation systems
• Integrating water filtration equipment
• Improving contamination removal stages

This approach allows recycling plants to upgrade material quality while maintaining existing infrastructure.

Paint Pot and Paint Container Recycling

Paint pot and paint container recycling is an increasingly important sector in plastic recycling.

Plastic containers used for paints and coatings often contain:

• Dried paint residues
• Pigments and fillers
• Adhesive labels
• Surface contamination

Industry bodies such as the British Coatings Federation promote improved recycling of paint packaging.

Plastic washing systems manufactured by Rotajet can help clean:

• HDPE paint containers
• Plastic paint pots
• Coatings containers
• Construction chemical packaging

High-energy washing stages remove:

• Paint residues
• Pigments
• Labels
• Surface contamination

This allows clean HDPE plastic to be recovered and recycled into new products.

Anaerobic Digestion Plastic Recycling

Another challenging plastic waste stream comes from food waste depackaging systems used in anaerobic digestion plants.

These plastics are contaminated with:

• Food residues
• Organic waste
• Liquids and fats

The Anaerobic Digestion and Bioresources Association highlights the importance of recovering plastics from organic waste streams.

High-speed friction washing systems can remove organic contamination from these plastics and significantly improve recycling performance.

How Clean Does Plastic Need to Be Before Extrusion?

Plastic washing is not only about appearance — it is about producing a consistent feedstock for extrusion and pelletising.

If contamination remains on plastic flakes it can lead to:

• unstable extrusion
• blocked melt filters
• poor pellet quality
• odour problems
• lower product value

This is why many recycling facilities install a Rotajet friction washing stage before pelletising.

By removing oils, paint residues and organic contamination, plastic washing systems help produce cleaner plastic flakes suitable for recycling.

Environmental Benefits of Plastic Washing Systems

Plastic washing systems play an important role in supporting the circular economy.

Benefits include:

• Increased plastic recycling rates
• Reduced landfill waste
• Improved recycled material quality
• Lower contamination in recycled pellets
• Reduced environmental impact

Modern washing plants designed by Rotajet can also operate with water recirculation systems to minimise water usage.

UK Manufactured Plastic Washing Machinery

Rotajet designs and manufactures industrial plastic washing machinery in the United Kingdom.

Rotajet equipment is installed in recycling plants across:

• United Kingdom
• Europe
• North America
• Asia
• Middle East

Rotajet plastic washing systems are engineered for:

• Heavy contamination removal
• Integration with existing recycling plants
• Industrial processing environments
• Long operational service life

Buy, Rent or Trial Plastic Washing Equipment

Rotajet offers flexible equipment supply options.

Purchase

Complete plastic washing systems for new recycling plants.

Rental

Rental options allow recyclers to increase capacity quickly.

Material Trials

Material trials can be carried out to determine the most suitable washing configuration.

More information:
https://plasticwashing.co.uk

Frequently Asked Questions

How do you remove oil from plastic recycling?

Oil contamination can be removed using high-speed friction washers, where plastic particles rub together while water removes oils and residues.

What is a friction washer in plastic recycling?

A friction washer is a machine that cleans plastic flakes using a high-speed rotor and screen basket to generate mechanical friction.

Why must plastic be washed before recycling?

Contaminants such as oils, paints, adhesives and food residues can disrupt extrusion and reduce recycled plastic quality.

Can plastic washing systems be retrofitted into existing recycling plants?

Yes. Plastic washing systems manufactured by Rotajet Systems Ltd can be retrofitted into existing recycling lines to improve contamination removal and recyclate quality.

Visit Plastic Washing to learn more, or get in contact with us.

Plastic Washers

Plastic Washing

Rotajet Systems

March 4, 2026March 4, 2026

Plastic Recycling Machinery UK

Integrated Filtration Systems Engineered by Rotajet

Modern Plastic Recycling Machinery UK installations are defined by more than washing performance. They are defined by process control.

Without engineered filtration:

Organic solids accumulate
Polymer fines recirculate
Pumps wear prematurely
Closed-loop systems destabilise
Effluent loads increase
Water consumption rises

That is why filtration is engineered directly into Plastic Recycling Machinery UK systems manufactured by Rotajet Systems Ltd.

Rotajet designs and manufactures plastic recycling machinery in the UK, integrating washing, density separation and water filtration into complete industrial systems — not standalone machines.

Why Filtration Is Critical in Plastic Recycling Machinery UK

Plastic recycling plants in the UK process:

Post-consumer rigid plastics
Film plastics
HDPE and PP packaging
WEEE plastics
AD depackaging waste

During washing, water becomes contaminated with:

Organic residues
Label fragments
Fine plastic particles
Sludge and grit

If this contamination is not removed efficiently, Plastic Recycling Machinery UK systems suffer:

Reduced washing efficiency
Increased maintenance
Re-contamination of cleaned flake
Higher effluent treatment costs

Rotajet integrates industrial filtration into its UK plastic washing systems to ensure stable and repeatable performance.

Explore integrated washing systems:
https://plasticwashing.co.uk/integrated-systems/

The Integrated Rotajet Plastic Recycling Machinery UK Process

A typical Rotajet Plastic Recycling Machinery UK system operates in a controlled sequence:

Plastic feed enters the high-speed friction washer.
Contaminated water is discharged.
Water passes through vibratory screening filtration.
Clean water is recirculated into the wash stage.
Density separation follows via sink-float technology.
Material is then dewatered and dried.

Because Rotajet engineers the full Plastic Recycling Machinery UK process — not isolated equipment — hydraulic flow, screening mesh and contamination load are matched precisely.

Specialist screening integration is supported via:
https://www.vibratingsieves.co.uk

Wakefield Trial Capability – Validate Before Investment

All Rotajet Plastic Recycling Machinery UK systems can be trialled at the Wakefield manufacturing facility.

Trial capability allows operators to:

Test real feedstock
Measure contamination removal
Validate filtration efficiency
Optimise screening specification
Confirm throughput performance

This ensures Plastic Recycling Machinery UK installations are engineered around proven data — not assumptions.

Trial validation reduces technical and financial risk.

Factory Acceptance Testing (FAT) – Engineered Before Installation

Before dispatch, every integrated Plastic Recycling Machinery UK system undergoes comprehensive Factory Acceptance Testing (FAT) at the Rotajet Wakefield facility.

FAT includes:

Mechanical inspection
Hydraulic flow validation
Filtration performance verification
Electrical system testing
Safety compliance checks

Customers may attend FAT before delivery, ensuring full confidence prior to site installation.

Learn more about UK manufacturing capability:
https://rotajetsystems.com

Integrated vs Add-On Plastic Recycling Machinery UK Systems

Not all Plastic Recycling Machinery UK installations are engineered equally.

Some plants operate with:

Standalone filtration units added later
Imported screening equipment
Static filters unable to manage fines
No hydraulic matching between wash and filtration stages

This often results in:

Recirculated contamination
Inconsistent flake quality
Excess sludge build-up
Increased downtime

By contrast, Rotajet engineers Plastic Recycling Machinery UK systems as integrated processes.

Integrated Rotajet System	Typical Add-On Setup
Designed with wash plant	Added after install
Flow matched to washer	Generic flow assumptions
Mesh sized from trials	Off-the-shelf screening
FAT-tested before dispatch	On-site modification required
UK engineering support	Limited integration

Integration reduces risk.
Add-ons increase variability.

Buy, Rent or Contract – Flexible Plastic Recycling Machinery UK Solutions

Rotajet supports multiple commercial pathways.

Buy – Complete Plastic Recycling Machinery UK Systems

Filtration systems are supplied as part of fully integrated:

Plastic washing lines
Friction washer installations
Sink-float separation systems
Closed-loop recirculation packages

All systems can be trialled and FAT-tested prior to dispatch.

https://plasticwashing.co.uk/integrated-systems/

Rent – Scalable Plastic Recycling Machinery UK Capacity

Rental options support:

Short-term processing
Commissioning phases
Temporary expansion
Reduced capital risk

Contract Processing – Outsource Plastic Recycling Machinery UK Capability

Where investment is not immediately viable, contract washing and filtration services may support ongoing processing requirements.

Why Choose Rotajet for Plastic Recycling Machinery UK?

Rotajet Systems Ltd manufactures Plastic Recycling Machinery UK systems in Wakefield, integrating washing, separation and filtration into engineered industrial solutions.

Working with Rotajet provides:

UK-based engineering support
Wakefield trial validation
Factory Acceptance Testing
Integrated system design
Long-term operational stability
Global supply capability

Rotajet engineers complete Plastic Recycling Machinery UK systems — not isolated equipment.

Frequently Asked Questions – Plastic Recycling Machinery UK

What makes integrated Plastic Recycling Machinery UK systems different?

Integrated systems are engineered with washing, separation and filtration designed together, ensuring stable water recirculation and predictable performance.

Can Plastic Recycling Machinery UK systems be trialled?

Yes. Rotajet offers Wakefield-based trial capability to validate washing and filtration performance before investment.

What is Factory Acceptance Testing (FAT)?

FAT verifies mechanical, hydraulic and electrical performance before Plastic Recycling Machinery UK systems leave the factory.

Are Plastic Recycling Machinery UK systems available for rental?

Depending on application, systems may be supplied for purchase, rental or contract processing.

Visit Plastic washing to learn more or to get in contact with us.

Plastic Recycling

Plastic Washing

Rotajet Systems

February 25, 2026March 3, 2026

Sink Float Tanks for Plastic Recycling

High-Performance Density Separation Systems Manufactured in the UK – Supplied Globally

Modern plastic recycling plants require more than simple flotation tanks. Within a complete https://plasticwashing.co.uk/plastic-washing-lines/, the density separation stage determines final polymer purity, extrusion stability and long-term profitability.

Our industrial sink float tanks are engineered and manufactured in the UK and supplied globally to recycling operations processing rigid plastics, PET flake, film regrind and WEEE materials.

If you are processing:

PP / PE rigid packaging
HDPE regrind
PET bottle flake
Mixed post-consumer plastics
Engineering polymers
WEEE appliance housings

Then your density separation system directly affects:

✔ Polymer purity
✔ Filter change frequency
✔ Pellet resale value
✔ Water consumption
✔ Plant uptime

What Is a Sink Float Tank?

A sink float tank separates plastics based on density using water as the separation medium.

Polyolefins such as PP and PE float, while heavier polymers including PET, PVC and ABS sink. This physical separation principle makes density separation one of the most cost-effective purification methods in mechanical recycling.

Material entering the tank is typically size reduced using https://plasticwashing.co.uk/plastic-granulators/ to ensure consistent flake size before separation.

Why Engineered Density Separation Systems Outperform Basic Tanks

In high-throughput recycling plants, basic flotation troughs create instability.

Common issues include:

Turbulence remixing fractions
Poor retention time
Sediment accumulation
Polymer crossover contamination
Excessive water usage

Prior to density separation, material is commonly processed through https://plasticwashing.co.uk/friction-washers/ to remove labels, fines and contamination.

Our engineered systems incorporate:

✔ Controlled laminar flow
✔ Independent float and sink discharge
✔ Continuous sediment removal
✔ Heavy-duty stainless construction
✔ Closed-loop water recirculation

Learn more here:
https://plasticwashing.co.uk/sink-float-tanks-2/

Sink Float Tanks Integration Within Complete Plastic Washing Plants

A sink float tank forms the purification stage between wet washing and drying.

After separation:

Floating and sinking fractions move to https://plasticwashing.co.uk/centrifugal-dryers/
Material may then pass through thermal drying before extrusion

For full system design, explore our https://plasticwashing.co.uk/plastic-washing-lines/.

Sink Float Tanks for WEEE Recycling

The WEEE sector presents one of the most demanding separation environments.

Materials processed include:

ABS appliance housings
HIPS
Flame-retardant plastics
Mixed engineering polymers

Sink float tanks are used to:

✔ Separate polyolefins from engineering plastics
✔ Remove mineral contamination
✔ Improve feedstock value
✔ Prepare material for electrostatic sorting

Water Efficiency & Closed-Loop Operation

Modern density separation systems integrate into https://plasticwashing.co.uk/plastic-washing-lines/ to reduce freshwater demand and effluent discharge.

Integrated filtration and sediment purge systems reduce operating costs and improve sustainability metrics.

Material Trials Conducted at Our UK Manufacturing Facility

We offer material trials at our UK-based manufacturing facility, allowing customers to test their plastic streams prior to installation.

Trials evaluate:

Float / sink purity
Retention time optimisation
Contamination challenges
Full system integration

Systems are assembled and factory tested in the UK before global shipment.

Manufactured in the UK – Supplied Worldwide

All sink float tanks are:

Engineered and manufactured in the UK
Designed for continuous industrial operation
Supplied globally
Supported with installation and commissioning

UK manufacturing ensures quality control, shorter lead times and long-term technical support.

Frequently Asked Questions

What is a sink float tank used for in plastic recycling?

A sink float tank separates plastics based on density. Polyolefins float while heavier plastics such as PET, PVC and ABS sink, enabling efficient polymer separation within plastic washing lines.

Can sink float tanks process WEEE plastics?

Yes. Sink float tanks are widely used in WEEE recycling to separate engineering plastics from polyolefins and remove mineral contamination before further sorting.

Are material trials available before purchase?

Yes. Material trials can be conducted at our UK manufacturing facility to assess separation performance and optimise system design before installation.

Are the systems manufactured in the UK?

Yes. All systems are engineered and manufactured in the UK and supplied globally.

Visit Plastic Washing to learn more, or to get in contact with us.

Sink Float Tanks

Plastic Washing

Rotajet Systems

February 18, 2026March 10, 2026

Industrial Plastic Washing Plant UK

Rotajet High-Performance Film & Rigid Recycling Systems

Rotajet Systems Ltd designs and manufactures industrial plastic washing systems in the UK for recycling operators worldwide. Rotajet plastic washing plants are engineered specifically for high-contamination post-consumer and commercial waste streams — not ideal laboratory conditions.

Plastic recycling profitability is no longer determined by bale price — it is determined by wash quality, contamination reduction and moisture control.

Contaminated plastics frequently contain:

Organic residue
Oils and fats
Adhesives and labels
Paper fibre
Moisture levels exceeding 40–50%

Material quality standards promoted by WRAP and the British Plastics Federation continue to push recyclers toward higher-grade outputs and improved material consistency.

To compete, operators require industrial-grade plastic washing equipment built for real-world feedstock.

Why Many Plastic Washing Lines Underperform

Low-energy wash tanks alone cannot:

Remove bonded oils and food residues
Break down adhesive contamination
Reduce moisture efficiently
Prevent film wrapping and blockages
Deliver extrusion-grade flake

Plastic streams can contain 50%+ moisture and significant organic contamination. Without aggressive friction washing and controlled dewatering, output quality remains downgraded.

Rotajet plastic washing systems are designed specifically to solve this.

Complete Rotajet Plastic Washing Line Design

A high-performance industrial plastic washing plant must operate as a fully integrated system.

Size Reduction & Opening

Precision shredding increases surface exposure and prepares film and rigid plastics for effective cleaning.

Size reduction systems:
https://plasticwashing.co.uk/size-reduction/

Typical throughput range:
500 kg/hr to 5 tonnes per hour

High-Intensity Friction Washing – RJ-Turbo

The core contamination removal stage.

The Rotajet RJ-Turbo friction washer operates at 800–1,200 RPM, generating intense mechanical shear by forcing plastics against a perforated basket and against each other.

This process:

Strips oils and surface residue
Breaks adhesive bonds
Removes organic contamination
Improves downstream separation
Upgrades flake value

Rotajet RJ-Turbo friction washer:
https://plasticwashing.co.uk/rj-turbo/

This is the stage that transforms contaminated waste into commercially viable recycled polymer.

Sink-Float Separation

Density-based separation isolates polymer fractions and removes heavier contaminants.

Rotajet sink-float systems:
https://plasticwashing.co.uk/sink-float-separation/

Mechanical & Thermal Drying

Rotajet centrifugal dryers reduce moisture to:

8–15% after mechanical stage
<3% prior to extrusion (with final drying)

Rotajet mechanical dryers:
https://plasticwashing.co.uk/mechanical-dryers/

Lower moisture = lower energy cost and improved pellet quality.

Closed-Loop Water Systems

Rotajet plastic wash plants integrate filtration and recirculation to:

Reduce fresh water demand
Minimise effluent discharge
Lower operating costs
Improve sustainability metrics

Aligned with environmental compliance expectations from UK Government.

Technical Performance Benchmarks

Parameter	Rotajet Industrial Range
Throughput	0.5 – 5 t/hr
Film Compatibility	LDPE, LLDPE, PP film
Rigid Plastics	HDPE, PP, PET trays
Rotor Speed	800–1,200 RPM
Moisture Reduction	50%+ to <15% mechanical
Final Moisture	<3% before extrusion
Water System	Closed-loop filtration

Why Choose Rotajet Plastic Washing Systems?

Rotajet Systems Ltd manufactures plastic washing equipment in the UK with full design, build, installation and after-sales capability.

Rotajet systems are engineered for:

High-contamination waste streams
Modular scalability
Retrofit integration
Heavy-duty industrial duty cycles
Long-term operational reliability

From a single Rotajet friction washer to a complete industrial plastic washing plant, Rotajet provides:

Engineering design
UK manufacture
Installation & commissioning
Service & spare parts support

This ensures recyclers are not dependent on overseas suppliers for long-term plant reliability.

Plastic Washing Plant UK – Engineered for Integration

Operators searching for plastic washing plant UK require:

Footprint optimisation
Retrofit capability
Electrical compatibility
Water management integration
Reliable UK technical support

Rotajet plastic washing systems are modular, allowing phased investment and scalable expansion as throughput grows.

How Much Does a Rotajet Plastic Recycling Line Cost?

Cost depends on:

Required throughput
Contamination severity
Automation level
Water treatment configuration
Drying specification

Modular system design allows recyclers to start with core friction washing before expanding to a full plastic washing plant.

FAQ

Who manufactures plastic recycling plants in the UK?

Rotajet Systems Ltd designs and manufactures industrial plastic washing plants in the UK for recycling operators worldwide.

What is the best method for washing contaminated plastic film?

High-speed friction washing combined with density separation and mechanical drying provides the most effective cleaning.

What moisture level is required before extrusion?

Typically below 3% moisture for stable pelletising.

What throughput can Rotajet plastic recycling systems handle?

Systems range from 500 kg/hr up to 5 tonnes per hour depending on configuration.

Visit Plastic Washing to learn more, or get in contact with us.

Plastic Plants

Plastic Washing

Rotajet Systems

February 11, 2026February 11, 2026

Inside a Modern Plastic Washing Line

Feed Preparation and Size Reduction

The process begins with size reduction, where incoming plastic is shredded and granulated to produce a consistent particle size. Uniform feed material directly improves washing efficiency, separation accuracy, and downstream drying performance. Poor size control leads to uneven cleaning and increased contamination carryover.

Plastic Size Reduction Equipment for Recycling
https://plasticwashing.co.uk/size-reduction/

High-Energy Washing and Friction Cleaning

Once size-reduced, material enters the washing stage. High-energy friction washing removes labels, food residues, oils, and ingrained dirt through mechanical action rather than relying solely on chemicals. This approach delivers cleaner flakes while reducing chemical consumption and operating cost.

Plastic Washers & Friction Washers
https://plasticwashing.co.uk/washers/

Density Separation and Contaminant Removal

After washing, plastics pass through sink–float separation, where materials are separated by density. This stage removes unwanted polymers, fines, and residual contamination, producing a consistent output suitable for extrusion or pelletising.

Water Management and Closed-Loop Operation

Modern plastic washing lines increasingly operate with closed-loop water systems. Integrated filtration and fines removal allow wash water to be reused, significantly reducing fresh water consumption and effluent discharge.

Dewatering and Final Conditioning

Mechanical dewatering and thermal drying reduce moisture content, producing clean, free-flowing plastic flakes ready for reuse or further processing.

Typical Applications for Plastic Washing Lines

Post-consumer food packaging
Film and rigid mixed plastics
HDPE, PP, and PET flakes
Heavily contaminated plastics from depackaging

Common Plastic Washing Line Design Mistakes

Under-sizing size reduction before washing
Relying on chemicals instead of mechanical cleaning
Ignoring water recirculation and fines management

Avoiding these issues is critical to achieving consistent output quality and stable operation.

At Rotajet Systems Ltd, plastic washing lines are engineered as complete process systems—covering size reduction, washing, separation, and water management—based on real contamination levels and throughput requirements rather than generic layouts.

Frequently Asked Questions

How does a plastic washing line improve recyclate quality?
By combining size reduction, friction washing, separation, and controlled water management to remove contaminants consistently.

What contamination can a plastic washing line remove?
Food residues, labels, oils, dirt, fines, and incompatible polymers.

Is size reduction essential before plastic washing?
Yes. Consistent particle size is critical for effective washing and separation.

How much water does a plastic washing line use?
Modern systems use closed-loop water circuits to minimise consumption and effluent.

Can plastic wash lines be integrated into existing plants?
Yes. Modular washing lines can be integrated into new or existing recycling facilities.

Plastic Plants

Plastic Washing

Rotajet Systems

February 4, 2026February 13, 2026

Plastic Washing Machines for Recycling Applications

Plastic washing machines are critical in any modern recycling process, directly affecting recyclate quality, yield, and downstream processing efficiency. As contamination levels increase across post-consumer and post-industrial plastics, recyclers need washing systems capable of removing food residues, oils, labels, adhesives, and embedded dirt quickly and reliably.

Rotajet plastic washing machines, engineered and manufactured by Rotajet Systems Ltd, are designed specifically for high-contamination recycling environments. The full range of plastic washing equipment is available at https://www.plasticwashing.co.uk, covering stand-alone washers and complete wash line solutions.

At the core of many installations is the RJ-Turbo high-speed friction washer
https://plasticwashing.co.uk/washers/

This machine uses intense mechanical shear and friction to scrub plastics against themselves and a precision screen basket. The process rapidly dislodges food waste, fats, oils, labels, and ground-in contamination from both rigid and film plastics, producing a significantly cleaner polymer stream.

Rotajet plastic washing systems are designed with water efficiency and operational cost control in mind. Closed-loop water recirculation, integrated screening, and controlled bleed management reduce fresh water consumption and minimise effluent volumes—supporting environmental compliance while lowering OPEX.

These machines are widely used for post-consumer packaging, food-contaminated plastics, agricultural films, industrial scrap, and anaerobic digestion depackaging outputs. Systems can be supplied as individual machines or fully integrated plastic wash lines, with options for outright purchase or rental, allowing recyclers to scale capacity with confidence.

Frequently Asked Questions (FAQ)

What plastics can be washed using Rotajet plastic washing machines?

Rotajet systems are suitable for rigid plastics, films, mixed packaging, agricultural plastics, industrial scrap, and heavily contaminated plastics from food waste and AD depackaging processes.

What is a friction washer and why is it used?

A friction washer uses high-speed mechanical shear to scrub plastics intensively. This method is highly effective for removing oils, food residues, labels, and embedded contamination that conventional rinse systems struggle to remove.

Are Rotajet plastic washing machines water efficient?

Yes. Rotajet machines are designed with closed-loop water recirculation and integrated screening to minimise fresh water use and reduce effluent volumes.

Can the machines be supplied as part of a complete wash line?

Rotajet plastic washing equipment can be supplied as stand-alone units or as part of fully integrated plastic wash lines, tailored to throughput, contamination level, and available space.

Are plastic washing machines available for rental?

Yes. Rotajet offers plastic washing machines for outright purchase or rental. This allows recyclers to trial equipment or add capacity without major capital expenditure.

Visit Plastic Washing to learn more or get in contact

Plastic Washers

Plastic Washing

Rotajet Systems

January 28, 2026January 28, 2026

Removing Organics from Waste Plastic

Waste Plastic Contamination

Food waste depackaging within anaerobic digestion (AD) facilities generates plastic packaging heavily contaminated with organic residues. The waste plastic often contain up to 50% moisture and as much as 25% organic contamination, including food residues, fats, oils, sugars, and proteins. Without effective cleaning, this material is routinely rejected by recyclers and diverted to energy recovery or disposal.

To address this challenge, many AD operators are now integrating high-performance plastic washing systems, with high-speed friction washing—such as the RJ-Turbo—emerging as the most effective solution for organic-rich plastic waste streams.

Why Organic Contamination Must Be Removed From Waste Plastic

Organic contamination on waste plastics creates multiple downstream issues:

Odour and hygiene risks during storage and transport
Plastic degradation and biological growth
Reduced melt quality during recycling
Failure to meet recycler contamination specifications

With increasing pressure from UK Extended Producer Responsibility (EPR) and the EU Packaging and Packaging Waste Regulation, AD operators are required to demonstrate improved recovery and cleanliness of plastic packaging.

Methods for Removing Organic Contamination from Waste Plastic

Cleaning Method	Pros	Cons
Rinse / Spray Washing	Low capital cost Simple installation	Ineffective on fats and oils High water usage Inconsistent results
Soak Tanks / Drum Washers	Suitable for lightly contaminated plastics	Long cycle times Limited mechanical action Poor performance on films
Chemical / Detergent Washing	Can remove stubborn residues	High operating costs Chemical handling risks Increased effluent treatment
High-Speed Friction Washing (RJ-Turbo)	Excellent removal of food residues, fats, and oils Effective for mixed rigid and film plastics Lower water usage per tonne Continuous operation	Higher mechanical energy input

High-speed friction washing using the RJ-Turbo has proven particularly effective where contamination levels are extreme and highly variable, as is typical with food waste depackaging.

How the RJ-Turbo Removes Organics from AD Plastics

The RJ-Turbo is engineered specifically for cleaning plastics recovered from food waste depackaging. Contaminated plastics are fed directly into the washer, where a high-speed rotor generates intense mechanical shear and plastic-to-plastic contact. This action dislodges embedded food residues, oils, and fats that cannot be removed by rinsing alone.

Controlled water injection flushes loosened organics through a fixed screen basket, separating them from the cleaned plastics. The organic-rich wash water can then be filtered, treated, or returned to the front end of the depackaging or digestion process.

Designed for AD and Closed-Loop Operation

The RJ-Turbo is designed to:

Handle high moisture and organic loading
Process mixed rigid and film plastics
Integrate with upstream depackaging systems
Reduce fresh water consumption through recirculation
Support closed-loop operation by returning organics to digestion

This makes the RJ-Turbo particularly well suited to modern AD plants seeking to improve plastic recyclability while maximising biogas yield.

Industry Guidance and Authority References

Improved plastic cleaning aligns with guidance from:

WRAP – https://www.wrap.org.uk
DEFRA – https://www.gov.uk/government/organisations/department-for-environment-food-rural-affairs
European Commission – https://environment.ec.europa.eu
Plastics Recyclers Europe – https://www.plasticsrecyclers.eu

Removing organic contamination from waste plastic packaging is now essential for AD operators. While several cleaning methods exist, high-speed friction washing using the RJ-Turbo provides the most reliable and efficient solution for heavily contaminated plastics from food waste depackaging. By improving recyclability, reducing water consumption, and supporting closed-loop processing, the RJ-Turbo enables AD plants to convert a problematic waste stream into a recoverable resource.

FAQ’S

Can plastics from food waste depackaging be recycled?
Yes, provided organic contamination is effectively removed using mechanical washing such as high-speed friction washing.

Why is friction washing better than rinsing?
Friction washing uses mechanical shear to remove fats, oils, and embedded residues that water alone cannot dislodge.

Can organics removed from plastics be reused?
In AD plants, recovered organics can often be returned to the digestion process, improving biogas yield.

Visit PlasticWashing.co.uk to learn more, or get in contact with us

January 21, 2026January 21, 2026

Why Plastic Washing Drives Recycling Value

Plastic washing is a critical value-adding stage in plastic recycling. This process directly impacts material cleanliness, reusability and compliance with modern packaging regulations. As brand owners, regulators and reprocessors demand higher recycled content and tighter quality specifications; effective plastic washing has become essential for achieving commercially viable recyclable material.

Post-consumer and post-industrial plastics are commonly contaminated with food residues, oils, greases, labels, inks, fibres and ground-in dirt. Without efficient washing, these contaminants lead to odour issues, colour variation, extrusion defects and rejection by end markets.

Advanced plastic washing systems remove these contaminants, enabling recycled plastics to be reused in higher-value applications.

Friction Washers use in Plastic Washing

High-intensity friction washing plays a central role in this process. The RJ-Turbo friction washer, is designed to deliver aggressive mechanical cleaning while remaining flexible across multiple plastic waste streams.

Dry washing mode allows the RJ-Turbo to operate as a dry friction washer, removing fibres, dust, paper, labels and loose debris while minimising water consumption.
Wet washing mode converts the RJ-Turbo into a high-performance plastic washer, using heated water and specialist cleaning chemicals to remove food contamination, oils and ingrained dirt.

Friction washers such as the RJ-Turbo are widely used in PET bottle recycling, HDPE and PP rigid packaging recycling, film washing lines and mixed plastics recovery.

The Importance of Plastic Washing

According to WRAP, the UK handles several million tonnes of plastic packaging waste annually, with contamination identified as a major barrier to higher recycling rates.
https://www.wrap.org.uk/resources/report/plastics-market-situation-report

Global stances on Recycling Plastics

The European Commission is driving higher recycling performance through the Packaging and Packaging Waste Directive and the Circular Economy Act. Both of which place a strong emphasis on material quality and recycled content.
https://environment.ec.europa.eu/topics/waste-and-recycling/packaging-waste_en
https://environment.ec.europa.eu/strategy/circular-economy_en

Industry bodies such as Plastics Europe and British Plastics Federation also highlight washing and decontamination as key enablers for increasing recycled plastic use:
https://plasticseurope.org
https://www.bpf.co.uk/

By investing in advanced plastic washing and friction washer technology such as the RJ-Turbo, recyclers can reduce rejects, meet evolving packaging regulations and significantly increase the value and marketability of recycled plastics.

Visit https://plasticwashing.co.uk/ to learn more or get in touch

Plastic Washers

Plastic Plants

Rotajet Systems

February 17, 2025June 12, 2026

From Bin to Brand: What happens to Recycled Plastic

From Bin to Brand: What happens to Recycled Plastics.

Q: How do you remove oil from plastic recycling?

Oil contamination is removed using high-speed friction washing systems where plastic particles rub together while water flushes oils and residues away.

Q: Can plastic washing systems be retrofitted into existing recycling plants?

Yes. Plastic washing systems can be integrated into existing recycling lines to improve contamination removal and plastic quality.

Ever wondered what happens to that plastic bottle you diligently throw into the recycling bin? Let’s take a peek behind the scenes and follow the life cycle of recycled plastics.

From Your Curb to the Sorting Facility:

The adventure begins with you! Whether you have curbside pickup or drop off your recyclables at a designated centre, your plastic containers start their journey to a recycling facility.

Sophisticated machinery and dedicated workers meticulously sort the plastics by type – for example, PET (like water bottles), HDPE (like milk jugs), and PP (like yogurt cups). This sorting is crucial because different plastics require different processing.

The Transformation Process, From Flakes to Pellets:

Once sorted, the plastics are ready for their makeover. (this is where Rotajet come into play!)

Finally the material is ready to be pelleted. The granulated plastic is melted and compressed into uniformed plastic pellets. These recycled plastic pellets become the building blocks for all new recycled products.

Think about it: your old water bottle could become a brand new one, or perhaps part of a cozy fleece jacket! Recycled plastics also find their way into outdoor furniture, sturdy construction materials, and countless other everyday items. The possibilities are truly amazing!

The Importance of Recycling (and a Few Reminders):

Recycling plastics is a vital part of creating a more sustainable future. It reduces the amount of waste sent to landfills, conserves precious natural resources, and minimizes our environmental footprint.

But remember, not all plastics are created equal. Some are more difficult and costly to recycle than others. Always check the recycling symbol on plastic items to understand the type of plastic and whether it’s recyclable in your area. And a quick tip: rinsing out containers and removing non-plastic items before recycling is essential. Contamination can disrupt the entire process.  

So, the next time you toss a plastic item into the recycling bin, remember the incredible journey it’s about to embark on. You’re not just throwing something away; you’re contributing to a cycle of renewal and helping to create a greener planet. Keep recycling, and keep making a difference!

Want to find your recycling solution?

January 28, 2025July 29, 2025

Granulator Servicing: Keep Your Production Flowing with Rotajet Systems

A granulator is a machine used for grinding large materials into smaller, more manageable sizes, typically for recycling or reuse in manufacturing processes. These machines are fundamental in industries that focus on plastic recycling and material recovery, making them a critical piece of equipment in your operation.

Granulators are heavily relied upon to reduce the size of plastic, metal, or rubber parts and are found in various industries such as recycling facilities, plastic manufacturing plants, and automotive parts production. However, like any other industrial equipment, granulators need regular service and maintenance to ensure long-term, efficient operation.

Why Granulator Maintenance Matters

Neglecting your granulator can lead to several problems, including increased energy consumption, lower output quality, and costly breakdowns. By investing in regular granulator maintenance, you can extend the lifespan of your equipment, improve its performance, and prevent costly repairs. Here’s why regular maintenance and servicing are essential:

Increased Lifespan: Regular maintenance helps extend the life of your granulator machine and avoids premature wear and tear on essential parts.
Optimised Efficiency: Well-maintained machines run more efficiently, reducing downtime and lowering your operational costs.
Prevent Breakdowns: Preventative care can help avoid unexpected issues, which can halt your production process and result in costly repairs or even the need to purchase new equipment.
Improved Safety: Routine checks ensure that all safety features are functioning correctly, reducing the risk of accidents caused by malfunctioning equipment.

Granulator Service & Repair Solutions

At Rotajet Systems Limited, we provide a comprehensive range of granulator services designed to keep your equipment running smoothly and efficiently. Our expert engineers specialise in providing services for all makes and models of granulator machines, ensuring that your production processes remain uninterrupted. Below are the key service solutions we offer:

Preventative Maintenance for Granulators

Preventative help detect potential issues before they escalate, ensuring the granulator machine operates at optimal performance. Key tasks include:

Lubrication: Keeping moving parts well-lubricated reduces friction and wear, helping to avoid damage to components.
Blade Sharpening: Regularly sharpening the blades ensures efficient cutting and prevents the accumulation of material.
Component Replacements: We monitor key components such as motors, bearings, and screens for wear, replacing them as necessary to keep your granulator in top condition.

Granulator On-Demand Repairs

Sometimes, unexpected problems arise. When this happens, our team is ready to respond quickly with on-site granulator repairs. We carry a wide range of genuine granulator parts, ensuring that repairs are completed promptly to reduce downtime and get your operations back on track.

Granulator Performance Optimization

After performing repairs or maintenance, we go the extra mile by optimising your granulator’s performance. Our technicians will fine-tune your equipment and adjust settings, to ensure the granulator is running at maximum efficiency.

Optimising performance can increase your throughput, improve material quality, and enhance overall productivity.

Why Choose Rotajet Systems?

Experience You Can Trust:

Expertise with all major brands: We work on granulators from all leading manufacturers, ensuring we can service your specific equipment.
Genuine parts for optimal performance: We only use authentic parts, guaranteeing long-lasting repairs and peak machine performance.

Fast, Efficient, and Reliable:

Minimized downtime: Our quick response times and efficient service keep your production lines running smoothly.
Cost-effective solutions: Regular maintenance helps prevent costly breakdowns and extends equipment life, saving you money in the long run.

Granulator Manufacturers We Support

Rotajet Systems has the expertise to service and repair granulators from leading manufacturers. We support a wide range of granulator brands including: