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Waste management 2


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Waste management 2

  1. 1. Materials ManagementWaste Management Waste management 1
  2. 2. Waste management 2
  3. 3. Definition Types of waste Waste Management methods Avoidance & Reduction Waste handling & transportContents Waste management concepts 3 Waste management
  4. 4. Definition Waste Management (WM) is a multi- disciplinary activity involving engineering principles, economic, urban and regional planning, and management techniques. It is closely related to social sciences. Since it cannot be avoided the efforts are required to minimize the overall wastivity of the system under consideration. Waste management 4
  5. 5. Basis of Recyclables of the Waste • Scrap Basis of Resource Wasted: • SurplusTYPES • Obsoletion OFWASTE Basis of Source of Origin Basis of Property 5 Waste management
  6. 6. Waste management 6
  7. 7. Disposal (Landfill) Disposing of waste in a landfill involves burying waste to dispose of it, and this remains a common practice in most countries. Historically, landfills were often established in disused quarries, mining voids or borrow pits Many landfills also have landfill gas extraction systems installed to extract the landfill gas. Gas is pumped out of the landfill using perforated pipes and flared off or burnt in a gas engine to generate electricity. Waste management 7
  8. 8. Disposal(Incineration) Incineration is disposal method that involves combustion of waste material. Incineration and other high temperature waste treatment systems are sometimes described as "thermal treatment". It convert waste materials into heat, gas, steam, and ash It is carried out both on a small scale by individuals and on a large scale by industry. It is used to dispose of solid, liquid and gaseous waste. It is recognized as a practical method of disposing of certain hazardous waste materials. Waste management 8
  9. 9. Recycling The process of extracting resources or value from waste is generally referred to as recycling, meaning to recovery or reuses the material. Waste management 9
  10. 10. Recycling Waste management 10
  11. 11. Recycling (Physical Reprocessing ) The popular meaning of ‘recycling’ in most developed countries refers to the widespread collection and reuse of everyday waste materials. The most common consumer products recycled include aluminum beverage cans, and aerosol cans. Other types of plastic (PVC, LDPE, PP, are also recyclable, although these are not as commonly collected. These items are usually composed of a single type of material, making them relatively easy to recycle into new products. Waste management 11
  12. 12. Recycling (Biological Processing) Waste materials that are organic in nature, such as plant material, food scraps, and paper products, can be recycled using biogical composting and digestion processes to decompose the organic matter. The intention of biological processing in waste management is to control and accelerate the natural process of decomposition of organic matter. Methods of biological decomposition are differentiated as being aerobic or anaerobic methods. Waste management 12
  13. 13. Avoidance and Reduction It is the prevention of waste material being created. Methods of avoidance include reuse of unwanted products, repairing broken items, designing single-use products to be reusable, and designing products that use less material to achieve the same purpose. Waste management 13
  14. 14. Waste handling and transport Waste collection methods vary widely between different countries and regions. Domestic waste collection services are often provided by local government authorities, or by private industry. Some areas, especially those in less developed countries, do not have a formal waste-collection system. Waste management 14
  15. 15. Waste management concepts Waste hierarchy Polluter pays - The waste hierarchy refers to principle the  - the Polluter Pays Principle is "3Rs" reduce, reuse and recycle, a principle where the polluting which classify waste party pays for the impact management strategies caused to the environment. according to their desirability in  With respect to waste terms of waste minimization. management, this generally The waste hierarchy remains the refers to the requirement for cornerstone of most waste a waste generator to pay for minimization strategies. appropriate disposal of the The aim of the waste hierarchy waste. is to extract the maximum practical benefits from products and to generate the minimum amount of waste see: resource recovery 15
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  17. 17. Bibliography Materials Management- S.D.Aphale Waste management 17