We know that one of the most important methods for disposing of polyethylene terephthalate waste is the use of incineration and landfill methods. In developing countries, these methods are widely used because of their low cost. These methods cannot be used for a long time; Because both the costs increase and the space required for landfilling decreases. In addition, the incineration of this substance also causes the production of toxic fumes and ashes in the environment. In this article from PetroProviders, join us to introduce you to disposing of polyethylene terephthalate waste.

Why is recycling polyethylene terephthalate important?

Polyethylene terephthalate is a polyester resin that has various applications in different factories. Due to the special properties of this material, its use is very popular for the production of various plastics. In addition, this material is used to produce a variety of insulation parts, dielectric foils as well as durable car parts.

It is interesting to know that if polyethylene terephthalate is used to produce various products, the unwanted by-products will be less, the reaction efficiency will be increased and the production costs will be reduced. In addition, due to the very good market of Iran Polyethylene Terephthalate, you are recommended to buy this material!

Iran polyehylene terepthalate uses

Iran polyehylene terepthalate uses

Due to the high production of this material and the very diverse fans of polyethylene terephthalate around the world, the use of this material can increase environmental pollution.

Therefore, it is better to prioritize recycling to use this material. Due to the high environmental pollution of plastics, these materials should not enter the environment. For this purpose, the best methods should be used to recycle polyethylene terephthalate.

Comparison of polyethylene terephthalate recycling and other disposal methods

Recycling polyethylene terephthalate is one of the best ways to manage and reduce PET plastic waste. Recycling uses fewer resources to react. In addition, it requires less energy, and if well managed for recycling, it can also reduce costs.

In addition, recycling will reduce the carbon footprint of materials in various industries. We know that PET plastics are used in different countries. In some European countries and Japan, very interesting technologies are used to recycle this material. If you live in these countries, you can find the major recipients of this material and give them your plastic product!

There are several ways to recycle PET; Types of recycling methods include:

  • Thermal recycling method
  • Mechanical recycling method for polyethylene terephthalate
  • Chemical PET recycling method

In each of these methods, different materials and technologies are used to get the best results from polyethylene terephthalate waste disposal.

Introducing each of these methods for PET disposal!

Mechanical recycling of materials is one of the best methods of recycling polyethylene terephthalate. In this process, various sorting reactions are performed, waste separation, washing, and removal of contaminants. Then, the material is crushed into smaller particles; Finally, extrusion and then processing will be done to mold the production of new products.

The disadvantage of using this method is that different heterogeneities will be seen in the plastic of the product. In addition, a lot of contaminants are produced in these methods. It is also involved in the mechanical recycling method of optical oxidation; For this reason, this method produces low-quality products. For this reason, this material can be used to produce low-grade PETs.

PET heat recovery is full of flaws! This method produces toxic fumes. In addition, a chemical method is performed for polyethylene terephthalate waste. In this method, polyethylene terephthalate materials are converted into monomers, oligomers, and other chemical forms.

Then various glycolysis methods such as hydrolysis are performed using strong acids and strong alkalis as well as first-class amines. These methods are also not cost-effective and are harmful to environmental health. Therefore, they can not be used for the useful disposal of polyethylene terephthalate waste.

Among the above methods, PET recycling using the biocatalytic method is one of the best methods for polyethylene terephthalate waste disposal. This method manages PET pollution, eliminates various products, and also does not produce specific pollution for the environment, and has no unwanted by-products!

Can this method be used?

Using this method, polyethylene terephthalate hydrolase can be used. Due to the advantages of this method, it can be used to recycle a large amount of produced pets. However, due to the mass production of PET, this method can not be used effectively.

In addition, most of the waste enters the ocean; So it’s really hard to find them! In some countries, such as France and Japan, this method is used to dispose of polyethylene terephthalate waste. This method has also improved the plastic economy of these countries.

Only four substances are known to hydrolyze PET. These materials can decompose PET polymer into its monomers. In addition to hydrolase, other enzymes such as esterase and lipase are used to apply these methods. So there are different methods for hydrolase, different materials can be used in these reactions.

enzymatic recycling performance

enzymatic recycling performance

In the figure above, a brief review of the enzymatic recycling performance of polyethylene terephthalate wastes using various methods is seen. As we know, several factors are affecting the efficiency of the PET hydrolysis reaction. In addition to the advantages of this method, many limitations and disadvantages are mentioned, which makes it very difficult to dispose of polyethylene terephthalate waste.

Biological mechanisms for the control of polyethylene terephthalate waste

polyethylene terephthalate waste mechanisms

polyethylene terephthalate waste mechanisms

Because the production of polyethylene terephthalate materials is very massive, the recycling of this material is very low; That’s why this process is like a funnel that pollutes the environment more every day!

Due to the very interesting properties of PET, the use of this material in different grades in different industries is very popular. For example, it is used in the production of durable plastics, the automotive parts industry, the production of electrical parts, the production of flexible clothing, as well as the production of cosmetics and insulation.

We know that the bonds between polyethylene terephthalate monomers are ester bonds. These bonds are very strong and increase the energy to break. These bonds are very stubborn to recycle! Because they are difficult to polymerize, but once they are polymerized, it is very difficult to convert them to monomers.

However, different enzymes that have esterase activity can participate in these reactions. For example, the types of enzymes used in polyethylene terephthalate hydrolase are listed below.

PET Recycling Enzymes

PET Recycling Enzymes

Different methods of polyethylene terephthalate waste disposal using recycling

Natural enzymes used to recycle polyethylene terephthalate have very little effect. For example, some esterases and hydrolase have very low efficiencies for recycling. Due to the hydrophobic nature of polyethylene terephthalate as well as its crystallinity, the function of enzymes in recycling reactions is limited.

In 2016, Yoshida and his colleagues introduced a bacterium that could use PET films as a source of carbon and energy! This bacterium sheds its hydrolyzing enzymes on PET and converts PET polymers into monomers!

One of the most important enzymes for PET recycling is PETase. Cutinase acts very similarly to this substance and has a very high environmental compatibility. Because cutinases are found in a variety of prokaryotic and eukaryotic organisms, they are used for a variety of recycling worldwide.

Cutinases can cover a very large area of ​​the substance and recycle it faster. In the following articles, we will introduce and examine all these enzymes in full. If this article has been interesting to you so far, be sure to send it to your friends! Maybe they can also play a role in increasing the disposal of polyethylene terephthalate waste…

Summary of disposing of polyethylene terephthalate waste review

In this article from PETROPROVIDERS, we saw interesting methods for disposing of polyethylene terephthalate waste. We know that the applications of polyethylene terephthalate for the production of various types of waste are very diverse. This material is used in the production of a variety of essential products for various automotive parts, clothing and apparel products, jewelry, cosmetics, as well as electrical insulation and electrical components. One of the most important applications of polyethylene terephthalate is the production of plastic bottles. These bottles are produced and consumed millions of times a day and then released into the environment. If you do not want to increase the environmental pollution, please do not throw away the PET bottles after using them! You can find the best major recyclers of this material all over the world and deliver your pet products to them.

In addition, you should do your best to reduce pet waste. In this regard, various methods of recycling polyethylene terephthalate waste are used around the world. For example, one of these methods is the use of biological metabolites.

In this method, various enzymes such as hydrolase and esterase are used to convert the polymer of polyethylene terephthalate into its monomers. What do you think about polyethylene terephthalate waste disposal? Can polyethylene terephthalate be widely produced and recycled? In developed countries such as Japan and France, can large-scale recycling of polyethylene terephthalate recycle all its products? You can contact us to buy the best polyethylene terephthalate with the highest quality. If this article was helpful to you, share it with your friends.


What is polyethylene terephthalate?

Polyethylene terephthalate is a polyester resin used in the plastics industry.

Is it safe for me to use pet?

Yes! According to FDA approval for this material, you can use it easily.

Why is the need for waste disposal important?

Various applications are considered for PET; This substance is in mass production daily. Therefore, it must be recycled well.

How to buy the best Iran polyethylene terephthalate?

You can contact our consultants right now to offer you Iran Polyethylene terephthalate with the highest quality.