In the guide below, we explain and compare closed loop vs open loop recycling.
We outline what each one is (definitions), list some of the main differences, provide examples, list some potential benefits & drawbacks of each,
What Is Closed Loop Recycling? (A Definition)
Closed loop recycling is when a material or product can be recycled over and over again (or indefinitely) for it’s original use, without losing it’s original properties or traits.
A majority recycled materials are used (usually with either very little, or no use of new raw materials), and these materials are therefore kept in the ‘loop’ where they can be utilized again in the economy without becoming waste.
When materials are kept inside this loop instead of being disposed outside of it, this is sometimes referred to as ‘closing the loop’.
The result of closed loop recycling is less material loss, fewer raw materials used, and reduced waste.
Closed loop recycling might be considered a process/activity that forms part of a circular economy.
What Is Open Loop Recycling? (A Definition)
Open loop recycling differs from closed loop recycling in that recycled materials or products:
– May use both recycled material and new raw material
– May eventually become waste because they can’t be recycled indefinitely, and will eventually need to be disposed of
This is usually because they lose their properties or traits each time they are recycled
Some plastic might be an example of this, whereby their polymer bonds weaken every time they are recycled
– May be recycled and used for a material or product that doesn’t match it’s original use
The material or product may also be downcycled into a new use
Open loop recycling may be considered a process or practice that is more of a part of a linear economy.
Closed Loop vs Open Loop Recycling: Main Differences
The main differences, as a summary of what’s described above, might be:
– Closed loop keeps more existing material in the economy, or in the utilization loop
– Closed loop may generate less waste, and may also keep more waste away from certain waste management destinations
– Closed loop may use less of some inputs (like energy, water, chemicals, etc)
– Closed loop may require less new raw material when reusing recycled material
– Closed loop may use materials more frequently for their original use, compared to open loop which may use materials more frequently for a different use
Closed Loop Recycling Examples
A few examples of recycling that may come close to, or in some cases involve 100% closed loop recycling, might be:
– Recycling glass bottles back into glass bottles
– Recycling aluminum tins and cans back into aluminum tins and cans
– There may be a small range of plastics that can recycled in a closed loop process, with some plastic bottles being one example
Open Loop Recycling Examples
A common example of open loop recycling is plastic recycling.
There’s a range of plastics that are recycled into different uses than the original use, or lower quality products.
You can read more about the difference between recycling and downcycling in this guide
Potential Benefits & Drawbacks Of Closed Loop Recycling
Several of the benefits and drawbacks of closed loop recycling are similar to the pros and cons of a circular economy that we listed in this separate guide.
As a brief summary though, some of the main potential benefits and drawbacks to closed loop recycling might be:
There May Be Sustainability & Environmental Benefits
From a sustainability perspective, if less new raw materials are used, and there’s less requirement for inputs to be used (like water, energy, chemicals, etc) at the production stage, this may be beneficial for sustainable resource management and the overall sustainability footprint
From an environmental perspective, if there’s less waste generated, and less waste going to landfill, incineration, and other waste disposal destination, there may be less potential for waste pollution and a range of other environmental issues
There May Be Economic Benefits
Some closed loop recycling processes may create new economic opportunities, such as new business opportunities, as well as new employment and income opportunities
There May Be Practical Limitations & Challenges To Consider
Not all materials and products can practically be recycled in a closed loop process
The properties of the material, or some other incompatibility issue, may make it practically difficult, or even impossible to recycle some materials in a closed loop process
There May Be Economic Drawbacks & Issues
Not all materials and products are economically feasible or profitable to recycle, and not all materials and products may be economically feasible or profitable to recycle in a closed loop process.
There’s also the consideration of how closed loop processing impacts the manufacturing and waste management industries.
Although new economic opportunities may arise in the closed loop recycling industry and related industries, there may be a corresponding decrease in economic opportunities in traditional recycling and specific waste management options.
Potential Benefits & Drawbacks Of Open Loop Recycling
As a brief summary though, some of the main potential benefits and drawbacks to open loop recycling might be:
Open Loop Recycling Is Already Well Established
Open loop recycling may already be far more common in places that recycle compared to closed loop recycling
May Be More Practical In Some Instances
Some materials may make far more practical sense for open loop recycling because of their properties, and, some materials may only be suitable for open loop recycling over closed loop recycling
May Have Economic Benefits
Some forms of open loop recycling may be far more economically feasible than closed loop recycling.
Some Groups May Irresponsibly Take Advantage Of Open Loop Recycling At The Expense Of Others
For example, in places where there’s credits, concessions or rewards for recycling, some groups may push more waste towards recycling.
This may benefit them financially, but, if the waste ends up downcycled and eventually going to landfill or incineration anyway, it may not necessarily be what is best for society from an economics or sustainability point of view.
May Have Sustainability & Environmental Drawbacks To Consider
In particular, open loop recycling may use more new raw materials and inputs, and in some instances contribute to resource depletion.
Also, there may be a greater eco footprint if more resources and inputs are used, or if more waste is generated from the open loop recycling process.
What Is Closed Loop Production?
Closed loop production refers specifically to the production and manufacturing stage.
It means that materials and waste used and generated during production/manufacturing are reused.
Companies sometimes claim that they use a ‘closed loop system’ when they use closed loop production processes.
What Is A Closed Loop Supply Chain?
A closed loop supply chain is essentially the same thing as closed loop production.
It applies to the supply and production stage of a material’s lifecycle, and involves businesses reusing supply and production stage waste and outputs for future production.