The document aims to provide a review on plastic waste management and different techniques used in it. Pyrocrat Systems Review on Waste Management.

1. PYROCRAT SYSTEMS REVIEW ON PLASTICWASTE MANAGEMENT
Pyrocrat Systems, J-103, 1st Floor,Tower No. 7,
Belapur Railway Station Complex,, C.B.D. Belapur,
Navi Mumbai, Maharashtra 400614

2. INTRODUCTION
 The term “plastics” includes materials composed of various elements such as carbon,
hydrogen, oxygen, nitrogen, chlorine, and sulphur.
 Plastics are macromolecules, formed by polymerization and having the ability to be
shaped by the application of reasonable amount of heat and pressure or any other
form of forces.
 It is one of the few new chemical materials which pose environmental problem.
 Polyethylene, polyvinyl chloride, polystyrene is largely used in the manufacturing of
plastics.

3. Background
 Rapid population growth, urbanization and industrial growth have led to severe
problem of waste generation in urban centres.
 The waste quantities increased from 46 million tones in 2001 to 65 million tones
in 2010.
 Report says that per capita per day production will increase to 0.7 kg in 2050.
 The characteristics of waste depends on various factors such as food habits,
traditions, lifestyle, climate etc.

4. Types of plastic materials
 Plastics, depending on their physical properties, may be classified as
thermoplastic or thermosetting plastic materials.
 Thermoplastic materials can be formed into desired shapes under heat and
pressure and become solids on cooling. If they are subjected to the same
conditions of heat and pressure, they can be remoulded.
 Thermosetting materials which once shaped cannot be softened/ remoulded by
the application of heat.
 Out of total uses of plastic, 80% areThermoplastic and 20% areThermosetting.

5. Categorization of plastic

6. Sources of plastic waste

7. Environmental Issues on disposal of
PLASTIC WASTE
 Plastic pollute beaches & oceans.
 Plastic bags litter the landscape.

8.  Plastic bags kill animals.
 During product manufacturing various types of gases are released.
 Indiscriminate plastic waste disposal on land makes the land infertile due to its
impervious nature.
 Burning of plastics generates toxic emissions such as Carbon Monoxide, Chlorine,
Hydrochloric Acid, Dioxin, Furans, Amines, Nitrides, Styrene, Benzene, 1, 3-
butadiene, CCl4, andAcetaldehyde.

9.  Sub-standard plastic bags, films etc. pose problem in collection and
recycling.
 Littered plastics give unaesthetic look and choke the drain.
 Garbage mixed with plastics interferes in waste processing facilities and
also cause problems in landfill operations.
 Lead and Cadmium pigments, commonly used in LDPE, HDPE and PP as
additives are toxic and are known to leach out.
 Non-recyclable plastic wastes poses disposal problem.

10. Plastic Waste Management
 Disposal of plastic waste is a serious concern in India. New technologies
have been developed to minimize their adverse effect on the environment.
Figure 1: Co-processing of plastic waste plastic Waste Management

11. Conventional Technology for Plastic Waste Management
 Recycling of plastics through environmentally
sound manner
 Plastics recycling technologies have been historically divided into four general
types- primary, secondary, tertiary and quaternary.
 Steps Involved in the Recycling Process:
 Selection: The recyclers/reprocessors have to select the waste /scrap which are
suitable for recycling/ reprocessing.
 Segregation: The plastics waste shall be segregated as per the codes mentioned
in the BiS guidelines.
 Processing: After selection and segregation of the preconsumer waste (factory
waste) shall be directly recycled. The post consumer waste (used plastic waste)
shall be washed, shredded, agglomerated, extruded and granulated.

12. Landfilling
 Landfill is the conventional approach to waste management, but space for
landfills is becoming scarce in some countries.
 A well-managed landfill site results in limited immediate environmental
harm beyond the impacts of collection and transport, although there are
long-term risks of contamination of soils and groundwater by some
additives and breakdown by products in plastics, which can become
persistent organic pollutants.
 A major drawback to landfills from a sustainability aspect is that none of
the material resources used to produce the plastic is recovered.

13. Incineration
 Incineration reduces the need for landfill of plastics waste, however, there
are concerns that hazardous substances may be released into the
atmosphere in the process.
 Incineration can be used with recovery of some of the energy content in
the plastic.
 The useful energy recovered can vary considerably depending on whether
it is used for electricity generation, combined heat and power, or as solid
refuse fuel for co-fuelling of blast furnaces or cement kilns.

14. New Technology for Plastic Waste
management
 Polymer Blended Bitumen Road
 A brief description of the technique used in laying road using plastic waste
is given in figure.

15.  Co-processing of Plastic waste in Cement Kiln
 Co-processing of plastic waste as Alternative Fuel and Raw
Material (AFR).
 Co-processing indicate substitution of primary fuel and raw material by waste.
 Waste material such as plastic waste used for co-processing are referred to as
alternative fuels and raw material (AFR).
 One of the advantage of recovery method used in existing facility is eliminating
the need to invest on other plastic waste practices and to secure land filling.

16.  Plasma PyrolysisTechnology (PPT)
 Pyrolysis is the thermal disintegration of carbonaceous material in
oxygen-starved atmosphere.
 The intense and versatile heat generation capabilities of Plasma Pyrolysis
technology enable it to dispose of all types of plastic waste including
polymeric, biomedical and hazardous waste in a safe and reliable manner.
 When optimized, the most likely compounds formed are methane, carbon
monoxide, hydrogen carbon dioxide and water molecules.

17.  Conversion of PlasticsWaste into liquid fuel
 The entire process is undertaken in closed reactor vessel followed by
condensation, if required.
 Waste plastics while heating upto 2700 to 3000 C convert into liquid-
vapour state, which is collected in condensation chamber in the form of
liquid fuel.
 The tarry liquid waste is topped-down from the heating reactor vessel.
 The organic gas is generated which can be used in dual fuel diesel
generator set for generation of electricity.

18. Figure 2: Schematic flow diagram of process.

19. CONCLUSION
 PlasticWaste Management has assumed great significance in view of the
urbanisation activities.
 Various strategies are being devised to mitigate the impact of plastic waste
in India.
 Some significant challenges still exist from both technological factors and
from economic or social behaviour issues relating to the collection of
recyclable wastes, and substitution for virgin material.