1 Ton/Hour PP/PE Recycled Pellet Deodorization Case Study: Easypure Odor Removal System

Recycled PP and PE pellets can contain residual odors even after conventional recycling processes.
The odor level depends largely on the source and condition of the incoming material.
Typical odor sources may include:
• Food packaging residues 
• Household packaging 
• Chemical residues 
• Printing-related substances 
• Organic contamination 
• Volatile substances generated during previous processing 
For applications with strict odor requirements, the presence of residual volatile substances can affect the acceptance and potential use of recycled pellets.
Therefore, deodorization can be used as an additional treatment step after recycling and pelletizing.

The challenge in this application is different from conventional plastic recycling.
The polymer has already been processed into pellets, but the material may still contain residual odor and volatile substances.
Odor from Different Feedstock Sources
Recycled PP and PE can originate from different waste streams.
Different sources may introduce different types and concentrations of odor-causing substances.
Volatile Substances
Some low-molecular-weight substances may remain in the recycled material after extrusion and pelletizing.
These substances can contribute to the odor of the finished pellets.
Odor Requirements for Downstream Applications
The acceptable odor level depends on the final application.
For odor-sensitive products, additional deodorization treatment may be required to improve the quality of the recycled material.
This creates a need for a dedicated post-pelletizing deodorization process.

For this application, ACERETECH uses the Easypure Intelligent Deodorization System with a processing capacity of 1 ton/hour.
The system is designed as a continuous treatment process.
Its core principle is:
Feeding → Heating & Airflow → Vacuum Extraction → Cooling → Discharge
During treatment, the recycled PP/PE pellets are exposed to controlled heating and airflow inside the deodorization hopper.
The vacuum system then extracts the released volatile substances and odor components from the treatment chamber.
After deodorization, the pellets are transferred to the cooling section before discharge.

The 1 ton/hour Easypure system consists of several integrated modules.
Main Configuration
• Particle Buffer Bin 
• Deodorizing Hopper 
• Material Receiver Equalization Kit 
• Air Generator with PLC Control 
• Post-Cooling Hopper 
• Vacuum Unit 
Each component performs a specific function in the deodorization process.
Together, they provide continuous material handling and controlled odor treatment.

The process starts with the Particle Buffer Bin.
Recycled PP/PE pellets are loaded into the buffer bin, typically from large bags or bulk containers.
The buffer bin provides temporary material storage before deodorization.
Its main function is to provide a more stable and continuous material flow to the downstream system.
This is important for maintaining consistent treatment conditions.
Instead of feeding pellets directly into the deodorization hopper in an uncontrolled manner, the buffer bin acts as an intermediate material supply.

Before entering the deodorization hopper, the pellets pass through the Material Receiver Equalization Kit.
The system uses a forced flip-type structure to distribute the pellets more evenly.
This helps reduce localized material accumulation and supports more uniform exposure to the deodorization conditions.
Consistent material distribution is important because the deodorization effect depends on the contact between the pellets and the controlled hot-air environment.

The Deodorizing Hopper is the core processing unit of the Easypure system.
The hopper is designed with an internal heating and airflow circulation structure.
Inside the hopper, the recycled PP/PE pellets are exposed to controlled temperature and airflow.
Under these conditions, volatile odor-causing substances can be released from the pellets.
The released substances are then removed through the vacuum system.
The deodorizing hopper therefore combines two important functions:
Controlled Heating + Airflow Circulation
to promote the release of residual volatile substances from the recycled pellets.

Temperature and airflow are important parameters in the deodorization process.
The system provides a controlled hot-air environment around the recycled pellets.
Heating helps increase the mobility and release of volatile substances, while airflow assists in carrying these substances away from the material surface.
The actual processing temperature and airflow conditions should be selected according to:
• PP or PE material characteristics 
• Pellet condition 
• Odor level 
• Throughput 
• Required deodorization performance 
The objective is to provide sufficient treatment without unnecessarily exposing the polymer to excessive thermal conditions.

The Vacuum Unit works together with the deodorization hopper.
As volatile substances are released during heating and airflow treatment, the vacuum system extracts the gases from the treatment chamber.
This provides several functions:
• Removes released volatile substances 
• Promotes continuous gas extraction 
• Reduces accumulation of odor inside the hopper 
• Helps prevent odor leakage into the workshop 
The combination of heating + airflow + vacuum extraction forms the core deodorization mechanism of the system.

The Easypure system uses a PLC-based control system to monitor and manage the deodorization process.
The operator can control and monitor key operating parameters through the control interface.
The system can manage parameters such as:
• Temperature 
• Airflow 
• Equipment operating status 
• Deodorization process conditions 
Automated control reduces the need for constant manual intervention and helps maintain more consistent operating conditions.
This is particularly important for continuous processing at a capacity of 1 ton/hour.

After deodorization, the treated pellets are transferred to the Post-Cooling Hopper.
The pellets have been exposed to elevated temperatures during the deodorization stage and therefore need to be cooled before final discharge.
The cooling hopper uses circulating airflow to reduce the pellet temperature.
This helps:
• Stabilize the treated material 
• Reduce the temperature before discharge 
• Facilitate subsequent handling 
• Prevent unnecessary thermal exposure after deodorization 
The cooling stage therefore completes the treatment cycle.

The complete process of this application can be summarized as:

PP/PE Recycled Pellets → Particle Buffer Bin → Material Equalization → Deodorizing Hopper → Controlled Heating + Airflow → Vacuum Extraction → Post-Cooling → Deodorized PP/PE Pellets

The system provides continuous treatment at a nominal capacity of 1 ton/hour.

Recycled plastic pellets are increasingly used in applications where material quality requirements are becoming more demanding.
Odor can become a limiting factor even when the basic physical properties of the recycled polymer are acceptable.
By reducing residual odor and volatile substances, deodorization can improve the sensory quality and potential application range of recycled PP and PE materials.
Potential odor-sensitive applications may include:
• Household products 
• Consumer goods 
• Automotive-related products 
• Packaging-related applications 
• Other applications where odor is an important quality criterion 
However, the suitability of the final recycled pellets for any specific application depends on the complete material properties and applicable product requirements.

The value of the Easypure system is that it adds a dedicated odor-control step after the recycled PP/PE material has already been processed into pellets.
The process does not replace shredding, washing, extrusion, or pelletizing.
Instead, it provides an additional treatment stage for recycled pellets that require improved odor performance.
The application can therefore be summarized as:

Recycled PP/PE Pellets → Residual Odor / Volatile Substances → Controlled Heating + Airflow → Vacuum Extraction → Cooling → Reduced-Odor Recycled Pellets

This provides recycled plastic producers with an additional option for improving the quality of odor-sensitive recycled materials. 

1. 1 Ton/Hour Processing Capacity
The system is designed for continuous treatment of PP and PE recycled pellets at a nominal capacity of 1 ton/hour.
2. Controlled Deodorization
Heating, airflow, and vacuum extraction work together to promote the release and removal of volatile odor-causing substances.
3. Stable Material Feeding
The buffer bin and material equalization system provide a more stable material flow into the deodorization hopper.
4. Automated Control
PLC control allows key operating parameters to be monitored and adjusted during operation.
5. Closed Vacuum Extraction
The vacuum system helps remove released volatile substances and reduces uncontrolled odor diffusion.
6. Integrated Cooling
The post-cooling hopper cools the treated pellets before discharge.
7. Modular System Design
The system consists of independent functional modules that work together as one continuous deodorization process.

This application demonstrates the use of the ACERETECH Easypure Intelligent Deodorization System for PP and PE recycled pellets.
The main challenge is residual odor and volatile substances that may remain in recycled pellets after conventional recycling and pelletizing.

The 1 ton/hour Easypure system addresses this through:
* Stable Feeding 
* Controlled Heating 
* Airflow Circulation 
* Vacuum Extraction 
* Post-Cooling 
* PLC Automatic Control

The complete process is:
PP/PE Recycled Pellets → Deodorization → Vacuum Extraction → Cooling → Reduced-Odor Recycled Pellets
The Easypure system therefore provides an additional odor-control solution for recycled PP and PE pellets where improved odor performance is required.

If recycled PP or PE pellets retain residual odor after conventional recycling and pelletizing, an additional deodorization process can help improve their odor performance.
The ACERETECH Easypure Intelligent Deodorization System combines:
Buffer Feeding → Material Equalization → Heating & Airflow → Vacuum Extraction → Cooling
The system described in this application is designed for 1 ton/hour PP/PE recycled pellet treatment.
Contact ACERETECH to discuss your recycled plastic deodorization requirements.