Recovery of energy from plastic waste through the incineration. Recycling of plastic waste.Incineration of plastic Waste. Recycling of plastic waste. Energy recovery from plastic Waste.

1. INCINERATION

2. INTRODUCTION
• A waste treatment technology, which includes the combustion of waste
for recovering energy, is called as “incineration”.
• Incineration of waste materials converts the waste into ash, flue gas and
heat.
• Incineration reduces the mass of the waste from 95 to 96 percent.
• The ash is mostly formed by the inorganic constituents of the waste, and
may take the form of solid lumps or particulates carried by the flue gas.
The flue gases must be cleaned of gaseous and particulate pollutants
before they are dispersed into the atmosphere.
• Heat generated by incineration can be used to generate electric power.

3. INCINERATION OBJECTIVES
The purpose of incineration is to combust solid wastes to reduce their
volume, without producing offensive gases and ashes. That is to say,
incineration of solid wastes aims at the following:
Volume reduction:
• Depending on its composition, incineration reduces the volume of solid
wastes to be disposed of by an average of 90%.
• This has both environmental and economic advantages since there is
less demand for final disposal to landfill, as well as reduced costs and
environmental burdens due to transport, if a distant landfill is used.

4. INCINERATION OBJECTIVES
Stabilization of waste:
• Incinerator output (i.e., ash) is considerably more inert than incinerator
input (i.e., solid wastes), mainly due to the oxidation of the organic
components of the waste stream. This leads to a reduction of landfill
management problems.
Sterilization of waste:
• This is of primary importance in the incineration of clinical or
biomedical waste. Incineration of solid wastes will also ensure
destruction of pathogens prior to final disposal in a landfill.

5. INCINERATION OBJECTIVES
Recovery of energy from waste (EFW):
• Energy recovered from burning the wastes is used to generate
steam for use in onsite electricity.

6. INCINERATION PROCESS
• Waste storage and feed preparation.
• Combustion in a furnace, producing hot gases and a bottom ash residue
for disposal.
• Gas temperature reduction, frequently involving heat recovery via steam
generation.
• Treatment of the cooled gas to remove air pollutants, and disposal of
residuals from this treatment process.
• Dispersion of the treated gas to the atmosphere through an induced-
draft fan and stack.

7. Typical waste-incineration facility schematic

9. ADVANTAGES OF INCINERATION
• The reduction in the original volume average 90%.
• It helps providing a renewable source and conserving valuable raw
materials.
• Bottom ash can be reused – as secondary aggregates for parking lots,
paved roads etc.
• Incineration does not generate methane gas and reduces methane from
landfills.
• It occupies small land.
• Energy generation

10. DISADVANTAGES OF INCINERATION
• It causes atmospheric pollution if incinerators are not well maintained.
• Large initial expenditure.
• Incineration process produces ash and waste water from pollution
control devices.

11. REFERENCES
• https://en.wikipedia.org/wiki/Incineration
• https://www.slideshare.com
• https://greentumble.com/waste-incineration-advantages-and-disadvantages/

12. THANK YOU!!!