RECYCL I NG
PRESENTED BY,
P.PRASANTH B.E
11
22 introduction
Convert (waste) into reusable material.
Return (material) to previous stage in
cyclic process.
Processing used material into new product.
Reduce energy usage ,reduce air & water
pollution, lower emission of green house
gases.
Recyclable material :-glass, paper ,metal
and electronics.
33
Recycling :-creating original products again.eg:-
office paper to office paper.
Not cost effective hence reusing is predominantly
made.
Getting salvage :-certain material with intrinsic
value are extracted.
eg :- lead – car battery ,gold
from computers.
44 History
Recorded in 400 B.C. by Plato.
Archeological study stated scarce availability of
raw materials made them reuse it.
Europe :Pre industrial times:-evidence and bronze
being reused.
Britain :- dust and ash collected from coal burning
was used as base material for brick making.
55 Essential of recycling
Continuous supply of recyclables.
Legislative options available:-
Mandatory recycling collection.
Container deposit legislation.
Ø
Ø
Refusal bans.
Ø
66 Government mandated
demand for companies
Forced to include recycling in their
operation.
Minimum recycling content
Ø
mandates .
Ø Utilization rates.
Ø Recycled product labeling.
77 process
Collection.
Ø Drop off centers.
Ø Buy back centers.
Ø Curbside collection.
Sorting.
cleaned ,reprocessed into
new materials.
88 Common recyclables
CONCRETE AGGREGATE.
put in crushing machine with
asphalt , brick, dirt and rocks.
Used as gravel for new
construction.
If free of contaminants even used
for new concrete creation
99 batteries
Ordinary batteries:-
Since toxic content available was hard to handle.
Lead acid batteries:-
recycling rate 90%.
Contain 80% of recycled materials.
10
10
Biodegradable waste
Recycled by breaking down waste material
by aerobic bacteria.
Can be done in house hold scale also.
Municipal house collection programs.
1111 Electronic disassembly
and reclamation.
Direct disposal banned due to toxic
contents availability.
metals plastic circuit boards separated,
component recycling made in cost
effective manner.
1212 FERROUS METALS AND NON FERROUS METALS
Steel :- Aluminum:-
Any grade was most efficient and
recycled into top widely-recycled
quality new model . material
42% of the crude Recycling
steel is from aluminium saves
recycled material. 95% of the energy
cost of processing
new aluminium.
1313 Glass recycling
Sorted to colour categories.
Recycled indefinitely as its structure does
not deteriotate.
1414 paper
Recycled by combining it with new pulp.
Quality decreases with each time.
Paper coated with plastic, aluminium
foil ,wax are not recyclable .pasted or
gummed paper not recyclable.
1515 Plastic
Recycling tough.
Sorted according to codes.
Should be done manually .
1616 Water
About 70% of earths surface is water.
Mostly of ocean only 3% is fresh water.
Ground water contaminated from
pollutants.
Mostly because of inadequately treated
industrial effluents.
Agro chemical pesticides entered into
underground water.
1717 Environmental effects of recycling
Material Energy Savings Air Pollution Savings
Aluminium 95% 95%
Cardboard 24% —
Glass 5-30% 20%
Paper 40% 73%
Plastics 70% —
Steel 60% —
1818
PRODUCTS MADE
FROM WASTE MATERIALS
1919 conclusion
Technical university of Denmark.
83% of cases recycling is most efficient way of
disposal of house hold wastes.
Without recycling.
Zinc would run out in 2037.
Indium and hafnium would run out in 2017
Terbium gone before 2012
Reduce carbon emission by 90%.
Saves energy ,Saves money ,saves trees.
2020 reference
http://www.greenstudentu.com/encyclopedia
http://en.wikipedia.org/wiki/Talk:Recycling
http://www.obviously.com/recycle/guides/shortest.h
http://www.indiaenvironmentportal.org.in
http://www.north-herts.gov.uk/where_does_the_recy
2121
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