Recycling ppt

PRESENTED BY,

P.PRASANTH B.E

RECYCLING

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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.

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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.

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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.

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ESSENTIAL OF RECYCLING

Continuous supply of recyclables.

Legislative options available:-

Mandatory recycling collection.

Container deposit legislation.

Refusal bans.

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GOVERNMENT MANDATED DEMAND FOR COMPANIES

Forced to include recycling in their operation.

Minimum recycling content mandates .

Utilization rates.

Recycled product labeling.

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PROCESS

Collection.

Drop off centers.

Buy back centers.

Curbside collection.

Sorting.

cleaned ,reprocessed into new materials.

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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

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BATTERIES

Ordinary batteries:-

Since toxic content available was hard to handle.

Lead acid batteries:-

recycling rate 90%.

Contain 80% of recycled materials.

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BIODEGRADABLE WASTE

Recycled by breaking down waste material by aerobic bacteria.

Can be done in house hold scale also.

Municipal house collection programs.

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ELECTRONIC DISASSEMBLY AND RECLAMATION.

Direct disposal banned due to toxic contents availability.

metals plastic circuit boards separated, component recycling made in cost effective manner.

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FERROUS METALS AND NON FERROUS METALS

Steel :-

Any grade was recycled into top quality new model .

42% of the crude steel is from recycled material.

Aluminum:-

most efficient and widely-recycled material

Recycling aluminium saves 95% of the energy cost of processing new aluminium.

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GLASS RECYCLING

Sorted to colour categories.

Recycled indefinitely as its structure does not deteriotate.

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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.

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PLASTIC

Recycling tough.

Sorted according to codes.

Should be done manually .

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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.

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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% —

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PRODUCTS MADE FROM WASTE MATERIALS

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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.

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REFERENCE

http://www.greenstudentu.com/encyclopedia

http://en.wikipedia.org/wiki/Talk:Recycling

http://www.obviously.com/recycle/guides/shortest.html

http://www.indiaenvironmentportal.org.in

http://www.north-herts.gov.uk/where_does_the_recycling_go__.htm#

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THANK YOU

“ONCE YOU HAVE

DISCOVERED WHAT IS

HAPPENING .YOU CAN’T

PRETEND NOT TO

KNOW ,YOU

CAN’T

ABDICATE RESPONSIBILITY

”P. D. JAMES.

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