Published on March 3, 2014
Waste Disposal Management Vishvaraj Chauhan; First Year Chemical Engineering; Sarvajanik College of Engineering & Technology, Surat.
How? What? Why? What? Waste disposal. Yes, whatever waste we create, ranging from cotton swabs to used uranium in nuclear reactors, it needs to be disposed. And no, not creating waste is impossible. Why? Simply because if left untreated, it can be toxic to a very high degree and may even threaten the life on Planet Earth. How? Lot’s of methods, but prevention is always better than cure. 3/3/2014 Waste Disposal Management 2
What Is Waste? According to the Basel convention of the United Nation’s Environment Programme: “'Wastes' are substances or objects, which are disposed of or are intended to be disposed of or are required to be disposed of by the provisions of national law” 3/3/2014 Waste Disposal Management 3
Whoa. That was a mouthful. Simply speaking, waste is anything the user wants to discard. Pretty much… 3/3/2014 Waste Disposal Management 4
Types Of Wastes. 1.) Municipal Wastes: Include household wastes, commercial wastes etc. Examples: Fruit remains, plastic bags, wrappers, thermocol, etc. 3/3/2014 Waste Disposal Management 5
2.) Hazardous waste: Includes industrial wastes, i.e. Toxic waste, chemical waste, metal remains etc. 3/3/2014 Waste Disposal Management 6
3.) Bio-Medical Waste: Source: The Times of India. 3/3/2014 Waste Disposal Management 7
4.) Special Hazardous Waste. Special Hazardous waste includes Radioactive waste, explosives waste, and Electronic waste (ewaste). 3/3/2014 Waste Disposal Management 8
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The Costs Of Waste. Environmental Costs: Inappropriately managed waste can attract rodents and insects, which cause yellow fever, worms, the plague and other conditions for humans, and exposure to hazardous wastes, when they are burned, can cause various other diseases including cancers. Toxic waste materials can contaminate surface water, groundwater, soil, and air which causes more problems for humans, other species, and ecosystems. 3/3/2014 Waste Disposal Management 10
Social Costs: Many of the environmental burdens cited before are more often than not borne by marginalized groups, such as racial minorities, women, and residents of developing nations; which leads to huge deformalities amongst a part of human population. 3/3/2014 Waste Disposal Management 11
Economic Costs: (Because nothing else catches our eye the most): The economic costs of managing waste are high, and are often paid for by municipal governments, and eventually burn a hole in your pockets. Environmental policies such as ”pay as you throw” can reduce the cost of management and reduce waste quantities 3/3/2014 Waste Disposal Management 12
How Can We Counter Waste? Waste can be countered by effective waste management. All waste materials, whether they are solid, liquid, gaseous or radioactive fall within the remit of waste management. Waste management practices can differ for developed and developing nations, for urban and rural areas, and for residential and industrial producers. However, reduction in the amount of waste is probably the most effective and easy counter. 3/3/2014 Waste Disposal Management 13
METHODS OF WASTE DISPOSAL 1.) Landfill Disposal of waste in a landfill involves burying the waste, and this remains a common practice in most countries. Poorly designed or poorly managed landfills can create a number of adverse environmental impacts such as wind-blown litter, attraction of vermin, and generation of liquid leachate. Another common product of landfills is gas (mostly composed of methane and carbon dioxide), which is produced as organic waste breaks down anaerobically. 3/3/2014 Waste Disposal Management 14
2.) Incineration Incineration is a disposal method in which solid organic wastes are subjected to combustion so as to convert them into residue and gaseous products. Combustion in an incinerator is not always perfect and there have been concerns about pollutants in gaseous emissions from incinerator stacks. Particular concern has focused on some very persistent organics which may be created which may have serious environmental consequences. 3/3/2014 Waste Disposal Management 15
3.) Water Treatment Plants Sewage treatment is the process of removing contaminants from wastewater and household sewage, both runoff (effluents), domestic, co mmercial and institutional. Using advanced technology it is now possible to re-use sewage effluent for drinking water, although Singapore is the only country to implement such technology on a production scale in its production of ’NEWater’. The objective of sewage treatment is to produce a disposable effluent without causing harm to the surrounding environment, and prevent pollution. 3/3/2014 Waste Disposal Management 16
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Ensure that your Municipal Corporation disposes off the waste properly. 3/3/2014 Waste Disposal Management 20
Set An Example. No, not like that! 3/3/2014 Waste Disposal Management 21
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Separate your waste. Firstly, into bio-degradable and plastics. Remember, not all plastics are environmental hazards. Depending upon the polymer content, plastics are divided as (Remember, lower the plastic, more is the material eco-friendly.): 3/3/2014 Waste Disposal Management 23
Educate your peers… Use dustbins… 3/3/2014 Waste Disposal Management 24
Till they are not needed…. 3/3/2014 Waste Disposal Management 25
Remember.. We are all in the same boat. ALL OF US. 3/3/2014 Waste Disposal Management 26
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