The transition from a linear economy toward a circular economy requires waste management systems capable of maximizing resource efficiency while minimizing environmental impacts. Existing circular economy models frequently employ the concepts of 3R, 5R, 6R, 7R, 9R, and 10R; however, these frameworks are often presented independently and without a unified implementation pathway.
This paper introduces the 369 SORTWASTE Method, a conceptual framework that organizes circular economy strategies into three progressive levels: 3R, 6R, and 9R. The model proposes a hierarchical evolution from basic waste prevention and recycling to advanced industrial circularity through refurbishment, remanufacturing, and high-value material recovery.
Rather than treating the various "R-frameworks" as competing models, the 369 SORTWASTE Method integrates them into a scalable roadmap that can support households, municipalities, industry, and policymakers in achieving higher levels of circularity.
Keywords: Circular Economy, Waste Management, Recycling, Resource Efficiency, 3R, 6R, 9R, Sustainable Development, Material Recovery, 369 SORTWASTE Method
Global resource consumption continues to increase while natural resource availability declines and environmental pressures intensify. Traditional linear economic systems based on extraction, production, consumption, and disposal generate increasing quantities of waste and greenhouse gas emissions.
The circular economy offers an alternative by extending product lifecycles, preserving material value, and reducing dependence on virgin resources.
Numerous circular economy frameworks have been proposed over the past decades, including the widely adopted 3R principle (Reduce, Reuse, Recycle) and more advanced models such as 6R, 9R, and 10R. Despite their growing acceptance, practical implementation remains fragmented because organizations often lack a structured pathway that explains how these frameworks relate to one another.
The 369 SORTWASTE Method addresses this challenge by organizing circular economy strategies into three consecutive levels of implementation.
The proposed framework assumes that circular economy maturity develops progressively.
Each higher level incorporates the principles of the previous level while introducing additional strategies that increase resource productivity and reduce waste generation.
The framework consists of:
Level I – 3R
Level II – 6R
Level III – 9R
This progression reflects increasing technological complexity, organizational maturity, and environmental performance.
The first stage focuses on universal participation.
The principles include:
Reduce
Reuse
Recycle
These actions establish the behavioural basis required for effective waste separation and resource conservation.
At this level, implementation emphasizes:
public awareness,
simple waste sorting systems,
household participation,
recycling infrastructure,
environmental education.
The primary objective is reducing waste generation while increasing recycling participation.
Once basic circular behaviours become established, organizations can implement additional strategies addressing product design and lifecycle management.
The proposed six principles are:
Refuse
Rethink
Reduce
Reuse
Repair
Recycle
This level shifts emphasis from waste treatment toward waste prevention.
Manufacturers improve product durability.
Consumers extend product lifetimes.
Municipalities develop repair infrastructure and reuse centres.
Consequently, resource productivity increases while material losses decrease.
The highest maturity level represents an industrial circular economy.
The proposed hierarchy consists of:
Refuse
Rethink
Reduce
Reuse
Repair
Refurbish
Remanufacture
Recycle
Recover
At this stage, products remain within the economic system for the maximum possible duration.
Energy recovery becomes the final option after all higher-value circular strategies have been exhausted.
The emphasis moves from waste management toward complete resource management.
The defining feature of the 369 SORTWASTE Method is its progressive architecture.
Rather than replacing previous approaches, each implementation level extends the capabilities of the preceding one.
The progression can be summarized as:
3R → Establish Circular Behaviour
6R → Optimize Product Lifecycles
9R → Achieve Industrial Circularity
This staged approach enables gradual implementation while maintaining organizational flexibility.
The proposed framework has the potential to:
reduce landfill dependency,
increase recycling efficiency,
improve material purity,
decrease greenhouse gas emissions,
reduce extraction of virgin resources,
support biodiversity conservation,
increase resource productivity.
Implementation of progressively advanced circular strategies creates opportunities for:
repair services,
refurbishment centres,
remanufacturing industries,
secondary raw material markets,
circular product design,
industrial symbiosis,
innovation in recycling technologies.
These activities generate economic value while reducing environmental costs.
The 369 SORTWASTE Method may provide policymakers with a structured roadmap for implementing circular economy strategies.
The framework supports:
municipal waste management planning,
national recycling strategies,
Extended Producer Responsibility (EPR),
sustainable public procurement,
circular economy legislation,
climate neutrality objectives.
Because implementation is progressive, countries and municipalities can adopt higher levels according to their technological and financial capacities.
Unlike many existing R-frameworks that describe isolated sets of circular economy principles, the 369 SORTWASTE Method proposes an integrated maturity model.
Its primary contribution lies not in introducing entirely new circular strategies but in organizing existing principles into a coherent implementation pathway.
The framework therefore functions simultaneously as:
an educational model,
an implementation roadmap,
a policy framework,
a management tool,
a communication model.
Future research should evaluate the framework using lifecycle assessment (LCA), material flow analysis (MFA), circularity indicators, and pilot implementations in municipalities and industrial sectors.
The 369 SORTWASTE Method proposes a structured progression from basic recycling behaviours toward advanced circular economy systems.
By integrating the 3R, 6R, and 9R principles into a single scalable framework, the model offers a practical roadmap for improving resource efficiency across households, businesses, municipalities, and industry.
The framework encourages gradual implementation while promoting increasingly higher levels of circularity and resource recovery. Further empirical research is recommended to validate its effectiveness under different economic, technological, and regulatory conditions.
Ellen MacArthur Foundation. Towards the Circular Economy.
European Commission. Circular Economy Action Plan.
Kirchherr, J., Reike, D., & Hekkert, M. (2017). Conceptualizing the Circular Economy: An Analysis of 114 Definitions. Resources, Conservation and Recycling, 127, 221–232.
Potting, J., Hekkert, M., Worrell, E., & Hanemaaijer, A. (2017). Circular Economy: Measuring Innovation in the Product Chain.
United Nations. Transforming Our World: The 2030 Agenda for Sustainable Development.
World Bank. What a Waste 2.0: A Global Snapshot of Solid Waste Management to 2050.
