Solid Waste Management Hierarchy
Waste management is the process in which the wastes are being collected, processed, and recycled to convert them into useful products or to disposed them in environment friendly manner.
Solid Waste management has several steps which are ranked according to their preference.
1. Prevention
This is the most preferred step in solid waste management hierarchy. It includes using less materials in design and manufacture, manufacturing long lasting products and using less hazardous materials for manufacturing of materials. This step ensures lesser waste generation. This step also focuses on cleaner and environment friendly production.
2. Preparing for Reuse
This step includes checking, cleaning, repairing, refurbishing whole items or spare parts. This is the most important step for minimizing waste generation. Here the waste is not allowed to enter into the disposal system. The wastes are collected in the middle of the production and then fed back along with the source to aid in production processes. This reduces the amount of waste generated.
3. Recycling and Composting
Recyclable wastes that cannot be reused is recycled by turning waste into new substance or product. This step also includes composting of organic wastes into products that improve fertility of soil.
4. Recovery
This step includes anaerobic digestion, incineration with energy recovery, gasification and pyrolysis which produces energy (fuel, power and heat) and other useful materials. This step ensures conversion of waste into useful energy sources.
5. Disposal
This is the least preferred step in solid waste management hierarchy. This step includes landfilling and incineration without energy recovery.
The main purpose of solid waste management hierarchy is to provide solid waste policymakers, managers, planners and the public, the most environment friendly methods of managing solid waste.
References
1. https://www.hierarchystructure.com/waste-management-hierarchy/
2. https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/69403/pb13530-waste-hierarchy-guidance.pdf
Solid Waste management has several steps which are ranked according to their preference.
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| Figure 1: Solid waste management hierarchy chart |
1. Prevention
This is the most preferred step in solid waste management hierarchy. It includes using less materials in design and manufacture, manufacturing long lasting products and using less hazardous materials for manufacturing of materials. This step ensures lesser waste generation. This step also focuses on cleaner and environment friendly production.
2. Preparing for Reuse
This step includes checking, cleaning, repairing, refurbishing whole items or spare parts. This is the most important step for minimizing waste generation. Here the waste is not allowed to enter into the disposal system. The wastes are collected in the middle of the production and then fed back along with the source to aid in production processes. This reduces the amount of waste generated.
3. Recycling and Composting
Recyclable wastes that cannot be reused is recycled by turning waste into new substance or product. This step also includes composting of organic wastes into products that improve fertility of soil.
4. Recovery
This step includes anaerobic digestion, incineration with energy recovery, gasification and pyrolysis which produces energy (fuel, power and heat) and other useful materials. This step ensures conversion of waste into useful energy sources.
5. Disposal
This is the least preferred step in solid waste management hierarchy. This step includes landfilling and incineration without energy recovery.
The main purpose of solid waste management hierarchy is to provide solid waste policymakers, managers, planners and the public, the most environment friendly methods of managing solid waste.
References
1. https://www.hierarchystructure.com/waste-management-hierarchy/
2. https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/69403/pb13530-waste-hierarchy-guidance.pdf
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