Solid waste disposal methods
- 1. SOLID WASTE MANAGEMENT GUIDED BY- MR. S.N.YADAV PRESENTED BY:- ■ RASBIHARI MEENA(141641) ■ ROHIT MEENA (141642) ■ KANHA GARG(141643) ■ AMIR SOHAIL KHAN(141645)
- 2. CONTENTS 1. METHODS OF DISPOSAL a. Sanitary landfilling b. Composting c. Incineration and pyrolysis d. Barging out in sea e. Shredding and pulverization 2. Effects of Improper Solid Waste Disposal 3. Case study 4. Solution to Improper Solid waste Disposal 5. Conclusion 6. Reference
- 3. What is disposal of solid waste? Solid Waste Disposal, disposal of normally solid or semisolid materials, resulting from human and animal activities, that are useless, unwanted, or hazardous. • Garbage • Rubbish • Ashes • Sewage-treatment solids • Mining wastes • Dead animals
- 4. ■ A method of disposing of solid waste on land without creating nuisances or hazards to public health or safety. ■ PROBLEMS: – Air pollution – Generation of liquid leachate. – Harmful Gas. Sanitary land filling
- 5. Shredding and Pulverisation The size and volume reduction of msw is accomplished by the physical process of shredding and pulverisation. .Shredding refers to the action of cutting and tearing. .Pulverisation refers to the action of crushing and grinding.
- 6. Composting ■ Composting as defined earlier is a process in which organic matter of the solid waste is decomposed and converted to humus and stable mineral compounds. There are three methods of composting: (1) Composting by Trenching (2) Open window composting (3) Mechanical Composting
- 7. Vermicomposting ■ ’Composting’ using various ‘Worms.’ ■ Manages Bio-Degradable waste. ■ Highly economical.
- 8. Incineration ■ Burning of refuse at high temperature in furnaces called incineration. ■ PROBLEMS: – Emission of dangerous fumes. – Incinerators require a source of energy to start.
- 9. Pyrolysis ■ It is defined as heating the solid waste at very high temperature in absence of air. ■ Pyrolysis is carried out at a temperature between 500C to 1000C to produce three component streams.
- 10. Barging it out in to sea ■ This method had been used in the past to dispose off refuse by throwing it away in to sea, after carrying it at reasonable distance from the coast on barges. ■ The sea depth such disposal point should not be less then 30m or so, and the direction of the current should be as not to bring it back towards the shore.
- 11. Case Study Solid Waste Management in Mumbai, India- ■ Waste Generation Garbage generated for 2011- 12: 9,200 metric tones (Ghanekar, 2013) Approximate Composition (in order of volume) – Compostable matter – Sand & Fine earth (from street sweeping) – Paper/cardboard – Others (plastics, glass, metals etc.) .
- 12. Waste Collection ■ Salient features: – Street Sweeping – 100% street cleaning in 1 or 2 shifts (67% by municipal staff and 33% roads by private contractors) – Power sweeping introduced in Island City area – Garbage management in 4 main beaches given to private entities on 5- year contracts – Collection 83% through collection bins and 13% house-to-house collection.. – 1396 trips each day. ■ Waste NOT COLLECTED = 15% of the amount generated. (Ghanekar, 2013) ■ Reason cited, IRONICALLY, is want of resources (when MCGM is the Richest Corporation in India (Pradhan, 2007)
- 13. ■ Waste Disposal - Journey of Waste Waste Collection from surrounding areas 3 Transfer stations at Mahalaxmi, Kurla and Versova 3 Landfills at Mulund, KanjurMarg and Deonar Waste Disposal - Journey of Waste Issues for the case-study .Sheer size of the population and corresponding Waste generation; High and rapidly increasing volume of Solid Waste 10000 MTPD by 2025(MCGM) .No apparent practice of even the most basic scientific waste management practices like waste segregation at source
- 14. Effects of Improper Solid Waste Disposal Air pollution Groundwater Contamination Stagnant water for breeding insects. Land can get degraded and poisoned
- 15. Solution to Improper Solid waste Disposal The government should work to invest on proper SWD facilities, like sanitary landfills and incineration factories. Should also improve solid waste collection, by making sure they collect most of the waste and segregating it to make disposal easier. They should also increase awareness throughout all sectors of society
- 16. Recommendation ■ The improvement of people and private sector through NGOs could improve the efficiency of solid waste management. ■ Public awareness should be created especially at primary level. ■ Littering of solid waste should prohibited in cities towns and urban areas. ■ More over house to house collecting solid waste should be collected .
- 17. ■ Sewage disposal and air pollution engineering by S.K.. GARG. ■ Bhalwar, Rajvir et al, 2009, Textbook of Public Health and Community Medicine, Pune. ■ MAHARASTRA HEALTH CORPORATION and public welfare department. http://www.mcgm.gov.in/irj/portal/anonymous?Navig ationTarget=navurl://c4b79f15e55f98176905a7c2c7 d910ee References
- 18. The End