Washing Lines for Bottle-to-Bottle PET Recycling

PET is a commonly used plastic material found in various products, including beverage bottles. PET stands for polyethene terephthalate and is known for its durability, clarity, and ability to be recycled. PET bottle-to-bottle recycling is the process of converting used PET bottles into clean and high-quality PET flakes that can be used to produce new PET bottles. This recycling process is an important step towards reducing plastic waste and promoting a circular economy.

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The drive towards a circular economy necessitates efficient and sustainable methods for plastic recycling, particularly for polyethene terephthalate (PET) bottles. The bottle-to-bottle recycling process plays a crucial role, and at its heart lies the washing line ' a multi-stage system responsible for transforming dirty, used bottles into clean, high-quality flakes ready for reuse. 

Washing lines play a crucial role in the PET bottle-to-bottle recycling process. They are responsible for removing impurities and contaminants from the collected PET bottles, such as labels, caps, and dirt. Without proper washing, these impurities can negatively affect the quality of the recycled PET flakes and limit their usability for producing new bottles.

While achieving high output is important, minimizing environmental impact through reduced water and caustic soda consumption is equally crucial. Using water efficiently in washing lines is crucial in order to minimize the environmental impact and reduce the strain on water resources. 

Another important factor to consider in washing lines for PET bottle-to-bottle recycling is the consumption of caustic soda. Caustic soda is commonly used as a cleaning agent in the washing process to remove stubborn contaminants and enhance the brightness of the washed PET flakes. However, excessive consumption of caustic soda can have a negative impact on the brightness of the flakes and increase the environmental footprint of the recycling process. 

Therefore, it is crucial to optimize the consumption of caustic soda in washing lines for PET bottle-to-bottle recycling. By using a lower amount of caustic soda, the brightness of the washed PET flakes can be maintained while minimizing the environmental impact. This can be achieved through process innovations and chemical innovations in the washing lines. 

I would like to delve into the intricacies of washing lines for bottle-to-bottle PET recycling, highlighting the delicate balance between efficiency and sustainability.

Washing lines orchestrate the transformation of used bottles into valuable flakes. The key stages include:

1. Pre-Sorting and Sorting: Initial sorting removes contaminants like non-PET plastics, labels, and caps.
2. Baling and Size Reduction: Bottles are compressed into bales and shredded into flakes.
3. Hot Caustic Wash: High-temperature caustic soda solution removes organic residues and impurities.
4. Rinsing and Drying: Multiple rinsing stages remove caustic soda, followed by drying to achieve the desired moisture content.

The Challenge: Balancing Water and Caustic Consumption:

While water is essential for rinsing and transporting flakes, excessive use can lead to higher wastewater treatment costs and energy consumption. Similarly, caustic soda effectively cleans but can dull the flakes if used excessively, impacting their value and suitability for high-end applications.

Advancements in PET Bottle Washing Technology:

Modern washing lines incorporate various innovations to minimize resource consumption:

Minimizing Water Consumption in PET Flake Washing:

• Recirculation and Clarification: Treated water is recycled and reused, significantly reducing overall use. Advanced filtration systems ensure water quality remains high.
• Spray Nozzles: High-pressure nozzles target flakes precisely, minimizing water used and maximizing cleaning efficiency.
• Closed-Loop Systems: Some systems capture and treat rinse water, minimizing wastewater discharge.

Reducing Caustic Soda Use in the Recycling of PET Bottles:

While caustic soda effectively cleans, excessive use dulls flakes, impacting value and suitability for high-end applications. Here's how we mitigate:

• Concentration Optimization: Using varying concentrations in different stages optimizes cleaning while minimizing overall caustic use.
• Multi-Stage Washing: Multiple stages with decreasing caustic concentration reduce overall consumption.
• Alternative Cleaning Agents: Environmentally friendly alternatives like enzymes and bio-solvents.

Ensuring the Brightness of Washed PET Flakes:

Flake brightness is crucial for high-end applications like food packaging. Here's how we maintain it:

• Controlled Caustic Use: Excessive caustic exposure dulls flakes; precise use ensures optimal cleaning without compromising brightness.
• Closed-Loop Caustic Recovery: Recovered caustic can be reused, further reducing consumption and associated environmental impact.
• Advanced Drying Technologies: Energy-efficient techniques like hot air drying and dehumidification minimize water evaporation and energy use. Rapid drying minimizes oxidation, which can dull flakes.
• Contamination Control: Removing impurities like coloured plastics prevents discolouration.
• Optical Sorting: High-tech sorters remove dull flakes, ensuring consistent brightness in the final product.

Friction Washers

The implementation of advanced technology introduces a continuous Friction Washer system as opposed to the conventional batch processing approach. This innovative technology facilitates the generation of friction among PET flakes, thereby resulting in reduced consumption of Caustic Soda and other detergents, among other benefits.

Environmental Benefits of Efficient Washing Lines:

Efficient washing lines offer substantial environmental benefits:

• Reduced Water Consumption: Saves thousands of litres of water per ton of recycled PET, minimizing freshwater withdrawals and wastewater treatment burdens. Advanced washing line technologies only use 1.1 to 1.3 litres of water per Kg of PET.
• Lower Energy Use: Energy-efficient equipment and water recycling reduce energy consumption, lowering greenhouse gas emissions associated with electricity generation.
• Decreased Chemical Use: Minimizing caustic soda use reduces the production, transportation, and disposal of this potentially harmful chemical.

Additional Sustainability Considerations:

• Energy-efficient Equipment: Choosing equipment with low energy consumption, like variable-speed drives, contributes to overall sustainability.
• Maintenance and Optimization: Regular maintenance and process optimization ensure equipment operates at peak efficiency, minimizing resource consumption.

Challenges and Opportunities in PET Flake Washing:

Despite advancements, challenges remain:

• Varying Input Material Quality: Different collection systems lead to inconsistent material quality, requiring adaptable washing lines.
• Stricter Purity Requirements: Evolving regulations demand even higher purity levels, pushing the boundaries of washing technology.

The Future of Sustainable PET Washing Lines:

Research and development are continuously pushing the boundaries of efficiency and sustainability. Emerging technologies like ultrasonic cleaning and bio-enzymes offer promising alternatives to traditional methods. Additionally, machine learning and data analytics are being used to optimise washing processes further, minimizing resource use while ensuring high-quality output.

Innovative Solutions for PET Bottle Recycling Efficiency:

The future of PET washing lines is paved with exciting innovations:

• Machine Learning and Data Analytics: Optimizing washing processes based on real-time data, ensuring optimal cleaning with minimal resource use.
• AI-Powered Sorting: Advanced artificial intelligence can identify and remove even minute contaminants, further improving flake quality.
• Closed-Loop Recycling Systems: Emerging technologies aim to create entirely closed-loop systems, minimizing waste and maximizing circularity.

Conclusion:

Washing lines for bottle-to-bottle PET recycling play a critical role in the circular economy. By adopting advanced technologies, prioritizing water and caustic soda efficiency, and implementing sustainable practices, these systems can contribute significantly to a greener future. As the demand for recycled PET grows, responsible innovation and collaboration across the recycling industry will be key to ensuring the long-term success and sustainability of bottle-to-bottle recycling.

With a growing emphasis on environmental awareness, the recycling of PET bottles has never been more critical. A PET washing line is a high-throughput, high-performance recycling system, specifically designed to handle post-consumer PET bottles with caps and labels from various sources. The goal of such systems is to achieve high-purity, low-moisture, uniformly clean PET flakes.

In this article, we'll delve into the workings of a PET washing line and how it aids us in achieving more efficient PET bottle recycling.

PET Washing Line: A Comprehensive Solution

A PET washing line encompasses multiple stages, including unpacking, pre-washing, label removal, sorting, granulating, washing and dehydrating, secondary granulating, and drying. These stages together form a comprehensive solution that can handle every part of a bottle, from the cap to the label.

Key Components of a PET Washing Line

A PET washing line is made up of various parts, each responsible for handling a specific stage of the recycling process. Here are some of the main components and their functions:

• Unpacking machine: Unpacks the tightly packed PET bottles, loosening them one by one.
• Pre-washing machine: Pre-washes the bottles with hot water to remove some contaminants.
• Label removal machine: Removes most of the labels on the bottles before shredding.
• Metal detector: Detects any metal contaminants that might be left in the bottles.
• Granulator/Shredder: Reduces the size of the material and pre-washes it.
• High-speed friction washer: Achieves good cleaning effects through the beating and spraying of blades.
• Hot wash tank/Steam washer: Washes with hot water using caustic soda to remove glue and oil.

The combination of these components ensures high purity and low moisture of the PET flakes, preparing them for the next steps in the recycling process.

Output of a PET Washing Line

Depending on the specific equipment and operating conditions, the output of a PET washing line can range between 500-600kg/h, 800-kg/h, -kg/h, -kg/h, -kg/h, and -kg/h. This flexibility allows PET washing lines to meet a variety of recycling needs of different scales.

Conclusion

A PET washing line provides a comprehensive, efficient solution for PET bottle recycling. With such a system, we can ensure every part of a PET bottle is utilized to its fullest while minimizing environmental impact. For those seeking to improve the efficiency of PET bottle recycling, a PET washing line is undoubtedly an option worth considering.

If you'd like to learn more about PET washing lines or see some actual machine operations, feel free to reach out to us at any time. We look forward to your interactions and working together to promote the recycling of PET bottles.

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Bottle-to-Bottle grade PET bottle washing line makes the sustainable development of PET bottle resource recovery come true. The global PET resources are being exhausted, but its demand is increasing year by year. The overexploitation of petroleum has caused irreparable damage to the natural and earth, human beings are suffering from nature. Sustainable development of PET resources recovery has been a major issue in the PET recycling industry. Full utilization of PET resources and 100% recovery of PET resources to achieve sustainable development is the ultimate goal of recycling. At present, the mainstream process to realize the recycling of PET bottles (containers) is physical recycling. Post-consumer PET bottles are collected from urban, it is recycled into rPET flakes by washing and crushing which rPET flakes can be used to manufacture food-grade chips. This kind of rPET flakes meets the standard of FDA which is available to contact food and beverage directly. Bottle-to-Bottle grade PET bottle recycling makes the sustainable development of PET bottle resource recovery come true.

Product Feature

The food-grade PET bottle washing line is mainly used for PET bottle-to-bottle project (FDA Approval), which recycles post-consumer PET bottles into rPET flakes. The regenerative PET flakes conform to the quality index requirements of downstream food packaging and are used for bottle blowing and packaging which can directly contact food after pelletizing and SSP processes in the late stage. The food-grade PET bottle recycling process is more complicated than normal PET recycling, and the requirement for equipment and the quality of the final rPET flakes are more strict. At the same time, the owner is required for higher factory management and advanced production knowhow. BoReTech food-grade washing line has higher automation to avoid human errors. Ultra-cleaning of PET bottles and flakes, efficient blending, and an online inspection system to ensure that the output of recycled PET flakes meets the standard of food-grade PET bottle-to-bottle process (FDA Approval). Meanwhile, the BoReTech food-grade PET bottle recycling system process is optimized according to the post-consumer PET bottle condition from different countries with the economic cost, less space occupation, and the most advanced process technology to meet the variety of downstream production applications. With more than 20 years of experience in PET bottle recycling production, BoReTech provides online production and process guidance to customers. BoReTech PET bottle recycling system adopts a SCADA system combined with a PLC controller, which can display parameter data of each unit and single PET bottle recycling equipment intuitively and effectively, and at the same time the system can record all production data, and it has combined the remote communication technology to allow communication between customers and BoReTech engineers by the internet and give them real-time guidance. BoReTech can assist customers with practical production management, data analysis, and equipment daily maintenance. In addition, the entire PET bottle system is equipped with an optical bottle sorter and flake sorter, which greatly reduces the investment of labor and improves production efficiency, thereby truly achieves a highly automated and clean recycling system. PET bottle bales are sorted, crushed, and washed by the food-grade PET bottle washing line, and finally generated high-quality rPET flakes. A number of well-known customers of BoReTech have obtained FDA approval of rPET flakes and supply these PET flakes to downstream brand beverage manufacturers. BoReTech analyses post-consumer PET bottles from various countries and is developing a short (compact)-process PET bottle recycling system for these post-consumer PET bottles in specific countries and regions. The developing system integrates multiple functions of a single machine and greatly reduces space occupation and investment. rPET flakes recycled by compact line can also meet the requirement of the food-grade application and micro-denier filament grade applications. It will be launched at the end of . BoReTech provides equipment and engineering service of PET bottle-to-bottle plant, please refer to https://www.bo-re-tech.com/en/solution/PET-Bottle-to-Bottle-Recycling-Plant.html

Our complete PET bottle recycling line is an ideal solution for anyone looking to start or improve their plastic bottle recycling business. The final products are clean PET flakes which can be sold at a good price.

Shuliy Machinery has manufactured PET bottle washing line machines for years and exported plastic bottle recycling machines all over the world, such as Nigeria, Saudi Arabia, Congo, Zambia, and Mozambique. Welcome to consult the plastic bottle recycling machine and visit our recycling plant!

PET bottle recycling line

Introduction of plastic bottle recycling machine

Plastic bottle recycling machines mainly includes plastic bottle label removal machine, plastic crusher, high-temperature washing barrel, rubbing washing machine, dewatering machine, etc.

This PET bottle washing line is mainly used to recycle waste mineral water bottles, cola bottles, plastic bottles made of PET. Shuliy Group can match different PET bottle washing plant, design factories, and calculate factory areas according to customers' different production needs, uses, and raw materials.

Recycling steps: removing bottle labels ' removing bottle trademarks ' crushing ' cleaning ' drying ' storage

500kg/h PET bottle recycling machines display

plastic bottle recycling line

kg plastic bottle recycling machine design

If you want to learn more, please visit our website plastic flakes washing line.

kg plastic bottle recycling machine introduction

Raw material & final products of plastic bottle washing plant

PET plastic bottles are widely used for packaging carbonated beverages, mineral water, fruit juice, and other kinds of beverages, they are the most used beverage packaging nowadays. More than that, PET is also widely used in food, chemical, pharmaceutical packaging, and many other fields. 650 billion PET bottles were produced and sold globally, and the increasing speed is still rising.

PET flakes plastic bottle flakes

Working video of PET recycling machines

3D video of PET bottle recycle machine

Introduction of PET bottle washing line

Step 1: Convey and picking (auto conveyor)

The picking table is made of belt conveyor steel frame structure, PVC belt with scraper, bend pulley, driving pulley, as well as adjustable speed motor, etc. It can be used in different fields, here it is the necessary equipment in plastic bottle recycling line.

Due to PET and PP PE are different materials, the processing of treatment is different, in order to increase the purity of final PET flakes, it is better to select the different material first.

Step 2: Remove trademark (plastic bottle de-labeling machine)

PET bottles label removing machine is professional in removing PET bottles label or water bottles label, it instead of people removing the label, to meet the big capacity requirements of the plastic bottle recycling line. By adjusting the blades, it can use for removing different size bottles.

Step 3: Crushing (plastic crusher)

The plastic crusher is used for crushing PET bottles, PVC, etc, it can crush the raw material into small flakes to recycle the waste plastic. The PET crusher is suitable for the plastic bottle recycling line.

Step 4: Cleaning (washing tank)

The washing tank separates PP or PE bottle caps from PET flakes, and also can clean the plastic flakes for the first time.

Step 5: Cleaning with hot water(hot water washing tank)

The hot water washing tank is an upper open structure with functions of automatic temperature control, heat preservation, and stirring. Which also has the advantages of fast heat transfer, large temperature difference, and convenient cleaning.

Widely used in waste plastics and other industries as heating, cleaning treatment. The hot water washing tank is especially suitable for small, medium, and large cleaning chemical fiber factories. And can adopt a completely closed structure according to technological demand.

Step 6: Friction cleaning (friction machine)

As one kind of plastic bottle recycling machine, a high-speed friction machine has its own unique function and advantage in the use of cleaning equipment.

The high-speed rotating screw allows the material to be fully rubbed with water, and the impurities (soil, sand, leaves, paper pulp) on the surface of the material are separated, and the dirty goods are washed with clean water. Unique water spraying design and high-speed running screw ensure an excellent cleaning effect.

Step 7: Washing and separating again (washing tank)

The washing tank is for washing and separating PP PE from PET again. Some materials need to be washed multiple times. Due to customers' requirements, broken plastic needs to be cleaned four times in the plastic bottle recycling line. In this operation, the plastic pieces would be separated and cleaned thoroughly, all impurities would be removed.

step 8: Drying and dehydration (dehydrator machine)

The plastic dehydrator machine is mainly used for the dehydration function of PP pellets so that the finished product can meet the storage requirements.

The wet PP particles are gradually raised by the auger of the plastic dehydrator machine, and more water is extracted by the principle of high-speed rotation. The machine can automatically feed and discharge, with no need for manual operation, and greatly improve work efficiency.

Step 9: Storage (storage bin)

Dried PET pellets were conveyed by the fan. Stock bin and packing machines not only can store final PET pellets but only can separate different materials. Stainless steel stock bin and packing machine plays important role in the transportation and packing of bags.

Video 1: plastic bottle crushing and washing plant

Recycled PET flakes quality

Pellet Sizes: Recycled PET flakes are often made into different pellet sizes depending on the specific requirements of the production. Common pellet sizes are usually around 2-3 centimeters.

Color: The color of PET recycled flakes can vary depending on the source of the raw material and the treatment process. Common colors include transparent, blue, green, etc. The exact color is determined by the customer's raw material.

No Impurities: Recycled PET pellets should contain the lowest possible level of impurities. Impurities can be from other plastics that were not completely removed during the recycling process, grease, color, etc.

Moisture: PET is a moisture-sensitive plastic, so recycled PET flakes usually needs to be dried, and our recycling lines process PET flakes with less than 1% moisture.

recycled PET flakes

Plastic bottle recycle machine successful projects

Machine recycling plastic bottles shipped to Nigeria

One client from Nigeria asked us for machine recycling plastic bottles, he is a purchaser of a professional recycling company. The company needs their recycling equipment to be painted green. Therefor, our manufacturing plant customized the following machines for them.

If you are interested in the project, welcome to read this case: Machine recycling plastic bottles for Nigerian recycling company.

Plastic bottle recycling machine in Nigeria

Shuliy waste plastic bottle recycling machines were ordered by our Nigerian customer. Their recycle materials are waste plastic bottles. If interested, you can get more details and video on this article: PET bottle recycling plant in Nigeria.

Washing machines of PET bottle washing plant

The necessary washing machines for cleaning PET flakes are a washing tank, hot water washing tank, and frictional washing machine. In fact, the PET washing machines are adjustable to choose from, people with a low budget can choose these three machines to wash their plastic flakes.

But if the waste plastic bottle is too dirty or the plant would like to use more washing equipment to ensure the plastic's cleanliness, the number of washing tanks, hot water washing machines, and frictional washing machines can increase to two or three.

PET bottle washing line

Our plastic bottle recycling line can also adjust the kind of washing machine according to the customer's order and the raw material. The whole washing step includes three washing machines, which are two washing tanks, a hot water washing tank, and a friction machine. The following video shows the customized plastic bottle recycling line which uses only one piece of washing equipment.

How are recycled plastic bottles reused?

Many people may wonder where recycled plastic water bottles have gone. In other words, many people know that plastic bottles can be recycled, but they don't know what they can do after recycling.

• Firstly, recycled plastic water bottles can be used to make textile materials, such as polyester, RPET cloth, etc., and then made into gloves, mattresses, etc.
• Secondly, recycled plastic PET bottles can be granulated into pellets, which can be made into various toys, buckets, and other daily supplies.
• After multiple processing or prolonged UV irradiation, plastics will cause problems such as aging and viscosity reduction. This waste plastic can also be recycled for RDF power generation. Due to the high heat value of plastic, the power generation effect is very ideal.

The clothes on the model are plastic waste from the beach

Prospects of the plastic bottle recycling business

A large part of the production of plastics depends on petroleum. The recycling of plastics is the recycling and utilization of petroleum resources.

From a macro perspective, the prospects of the plastic water bottle recycling industry are very optimistic. At present, the main recycling industries include waste metal recycling, waste paper recycling, waste rubber recycling, and waste plastic recycling. The reuse rate of waste metal can reach 70-80%, the waste rubber can reach 47%, and the waste paper 20-30%. However, the reuse rate for plastic is less than 30%.

Therefore, the recycling market of waste plastics is still very broad, and the plastic bottle recycling line is also very popular and practical. Combined with the global attention to environmental protection, resource conservation, and other issues, the requirements of plastic bottle recycle machines will keep increasing, and the development potential of the plastic recycling industry will only grow.

Profit of plastic bottle recycling machine

The main methods of dealing with plastic waste mainly include incineration, disposal in a landfill, and recycling. Plastic waste recycling maybe not be a very profitable business in many people's opinion. Exactly, one plastic bottle has very low value, however, in the big cities, millions of waste mineral water bottles will be produced by people at least, one-ton mineral water bottle probably has 60 thousand plastic bottles' which can make a profit of about 300 dollars.

On the surface, the plastic bottle recycling line is a business with low profit, in fact, if you have a stable supply, comprehensive knowledge of plastic, and a team, plastic recycling is a profitable business for you.

Is plastic bottle recycling business profitable

FAQs of plastic bottle recycle machines

What is the output of this PET bottle washing plant?

Generally speaking, the production range of this production line is 500- kg per hour. The maximum output can reach more than 6 tons per hour.

What is the energy consumption of plastic bottle recycling machines of 500 kg per hour?

Processing one ton of material consumes 60 kWh of electricity.

Is it necessary to wash the PET flakes four times?

It depends on your raw materials, if your plastic bottles are not very dirty, it is possible to clean them less than four times.

How to choose PET recycling machines with a low budget?

Because the cleanliness of plastic bottles is different, the washing equipment they need is different too. A washing tank, a hot water washing tank, and a frictional machine are necessary for recycling PET bottles, if one has a low budget, he can choose these three machines at least.

But if he has a high budget, he can choose more three PET recycling machines, for example, one washing machine, two or three hot water washing machines, two frictional machines. Machines in different numbers will provide different effects. More cleaning machines can wash waste PET flakes cleaner, which also has a higher price.

Why plastic bottle recycling machines become more and more popular?

1. Many waste PET plastic bottles are produced every day, which causes great pollution to the environment. Recycling waste is good for protecting the environment.
2. Turn waste plastic bottles into treasures, it has widely used. People's education level has improved hugely, more and more people started to realize the importance of environmental protection.
3. Save resources and promote the development of the industry. Recycling plastic waste can help plants save resources and costs, the leftovers of production can be reused, it is good for business.

Client feedback on the plastic bottle recycling machine

Our customers bought our plastic recycling equipment, and they have a very high comment of our plastic bottle recycling machine, and already put them into use. Here are some photos of their visit to our company and factory. We entertained them warmly, then they expressed their satisfaction to us and started their own plastic recycling business. Shuliy machinery welcomes clients to visit our company and factory.

customer visit

Our service of PET bottle washing line

If you are looking for more details, kindly visit pet plastic bale breaker machine.

• Our delivery time is one month, from the receipt of an order to the goods arriving at the port.
• The goods will be dispatched on time, and customers can check the logistics information during the transportation.
• When customers receive the goods, we will offer plastic bottle recycling machine instructions and an installment video. We can also offer a live stream or organize our engineer to your plant to instruct.
• Except for wearing parts, quality assurance within one year, and lifetime maintenance.
• Our company's integrity management, and quality assurance,welcome to consult and negotiate.

our team and factory