The following terms are categorized by most favorable solutions according to the Circular Economy Principles, with energy recovery and disposal being least favorable and not part of the CE principles, as they do not minimize waste creation.
1. Prevention:
Waste prevention relates to reducing the amount of waste generated, reducing the amount of hazardous waste, and reducing the impact on the environment. When people create less waste, they consume fewer resources. This term closely relates to rethink and reduce one’s consumption patterns.
2. Minimization:
Waste minimization is a set of practices intended to reduce the amount of waste produced. By reducing or eliminating the generation of harmful and persistent wastes, waste minimization supports efforts to promote a more sustainable society. Waste minimization involves redesigning products and processes, while changing societal patterns of consumption and production.
3. Remanufacturing:
Remanufacturing is the repair or replacement of worn-out or obsolete components and modules. Remanufacturing is a form of a product recovery process that differs from other recovery processes in its completeness: a remanufactured machine should match the same customer expectation as new machines. Functioning, reusable parts are taken out of a used product and rebuilt into another. This process includes quality assurance and potential enhancements or changes to the components. By definition, the performance of the remanufactured component is equal to or better than ‘as new’, while producers are able to provide a guarantee as a new component. Remanufacturing in production is the most desirable term due to its high level of quality while being of lower cost than the equivalent new component. From cases, it’s been proven that for productions to increase the use of remanufacturing, these have gained the advantages of new market shares, increase of staff, increase of sales while the decrease in used materials/resources. The term remanufacturing is the central production-term put forth in the circular economy.
4. Repair / Reconditioning:
Product reconditioning involves returning a product to good working condition by replacing or repairing major components that are faulty or close to failure, and making ‘cosmetic changes’ to update the appearance of a product, using methods such as resurfacing, repainting, etc. Any subsequent warranty is generally less than issued for a new or remanufactured product, but the warranty is likely to cover the whole product. Accordingly, the performance may be less than ‘as new’.
5. Refurbishment:
Refurbishment refers to the process of life-extending a component in a second life cycle, therefore moving away from the first life cycle and initial production purpose. It is defined as utilizing a component in a role it was not originally designed for.
6. Reuse:
Reuse refers is the action or practice of using an item, whether for its original purpose or to fulfill a different function, therefore re-functioning the item. It should be distinguished from recycling, which is the breaking down of used items to make raw materials for the manufacture of new products. Reuse – by taking, but not reprocessing, previously used items – helps save time, money, energy, and resources. In this term, life extension can be imbedded. If the item is reused for original purpose, it stays in first lifecycle, however if parts of item is reused in different function, it will enter its second lifecycle. Life extension can be interpreted in all scenarios from remanufactured, repair/reconditioning, refurbishment and reuse.
7. Recycling:
Recycling is the process of converting waste materials into new materials and objects. The recyclability of a material depends on its ability to reacquire the properties it had in its virgin state. It is an alternative to “conventional” waste disposal that can save material and help lower greenhouse gas emissions. Recycling can prevent the waste of potentially useful materials and reduce the consumption of fresh raw materials, thereby reducing energy usage, air pollution, and water pollution. Recycling is the last of the official circular economy terms, and the least favorable, as when designing from waste it is ultimately downcycled, however can be argued to slow the rate of waste creation.
8. Energy recovery:
Energy recovery or also known as Waste-to-energy (WtE) is the process of generating energy in the form of electricity and/or heat from the primary treatment of waste, or the processing of waste into a fuel source. WtE is a form of energy recovery. Most WtE processes generate electricity and/or heat directly through combustion, or produce a combustible fuel commodity, such as methane, methanol, ethanol, or synthetic fuels. WtE is also commonly used in the disposal of plant or animal material, known as biomass, to create biofuels and bioenergy, aimed at creating a new source of renewable energy.
9. Disposal:
Removing and destroying or storing damaged, used, or other unwanted domestic, agricultural, or industrial products and substances. Disposal includes burning, burial at landfill sites or at sea, and recycling.