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Prepaired By:
Zesrin Rezoana
Sylhet Agricultural University
What is Waste?
Waste- is source in the wrong place at wrong time. Once it
finds its rightful place, it will be just as valuable as any other
resource
Type of waste
 Solid
 Liquid
Sources of agricultural waste • Animal
• Plant
• Field or Farm
The main types of agricultural waste are • biological
• Solid
• Hazardous
Sources & Types of Agricultural Waste
Hazardous waste Biological waste
Solid waste
Main type of waste
Animal Plant Farm or field
Sources of Agricultural waste
Main type of Agricultural waste
Solid Waste:
 In Simple Words - Solid wastes are any
discarded or abandoned materials. Solid wastes
can be solid, liquid, semi-solid or containerized
gaseous material.
Examples of solid wastes include the
following materials when discarded:
 scrap metal
 waste tires
 latex paints
 furniture and toys and
plastic bottle
 garbage
 vehicles oil an
anti-freez
Environment pollution by solid
waste
42%
12%
15%
31%
Not Properly removed
Scattered outside the bin
Disposed on roadside or drain
Disposed on open place
Types of solid Waste
Municipal
Waste:
Residential waste:
Food waste,rubbish,ashes, special waste
Commercial waste:
Food waste,rubbish, decomposition &construction waste,occasionall hazardous
waste
Open areas:
special waste,rubbish
Treatment plant:
Treatment plant waste,composed of residual sludge
Industrial
Waste:
Chemical waste:
Chemic Pesticides, fertilizers and other chemicals. agriculture, Heavy metal
Mercury,anti-frezzer etc
Solid waste: scrap paper,plastic materials,sanitary
Toxic and hazzadious waste:
Amonia,murcary,
CFC
Bio-medical
waste:
pathological waste, pharmaceutical waste, genotoxic waste, chemical waste,
and radioactive waste etc.
Amount of solid waste genaration in
sylhet city
0
50
100
150
200
250
300
2004 2007 2010 2013 2016 2017
100
110
180
210
250
260
Tons/day
Objective of managing of solid
waste:
 Public hygine and health
 Reuse,recovery,recycle
 Sustainable development
 aethetics
 And covert waste into source of energy
 Going towards minimum wastage
Effects of waste if not
managed wisely
 affects our health
 affects our socio
economic conditions
 affects our coastal
and marine environment
 Effects our claimate
Concept of waste management
 Established waste
treatment technologies
 Composting
 Incineration
 Landfill
 Recycling
 Windrow
composting
Alternative waste management
treatment
 Anaerobic digestion
 Alcohol/ethanol production
 production of biomass to
mixed alcohol fuels (pilot scale)
 Gasification
 Mechanical biological treatment
 Mechanical heat treatm
 Sewage treatment
 Tunnel composting
Concept of 4R:
We apply 4r for waste management . reduce, reuse,
recover, recycle to all our services. Wwe actively angage
waste generators in managing their waste responsibly.
 R for reduce
 R for reuse
 R for recycle
 R for recover
Recycle:
Means to use materials again in
a new formation.
Importance of recycle:
 Saves limited natural resources
 prevent greenhouse gas
emissions and water pollutants.
 saves energy
 provides raw materials for
 industry
 creates jobs
 saves landfill space
Waste Recycling :
Reduction:
Means to make something smaller . Waste reduction, the
combination of waste prevention and recycling efforts.
Importance of waste reduction.
 waste prevention benefits the environment
 makes good financial sense.
 benefits society,.
Reuse:
 Reuse means using reusable old things or product
again.
 manufacturing new products drains our limited natural
resources,
 disposing of unwanted
materials from environment,
 One way to prevent
waste,
 improve our communities,
 provide help to other
people who are in need.
.
Recovery:
Resource recovery goes further than just
the management of waste. different treatment
technologies
 In recovery broken materials are reused by fixing
 It is economical in the case
of pursuing new things
 By recovering we can
save of money,waste and
environment
Concept of solid Waste
Management
Transfer station
Transfer vechicle
Collection vechicle
On-site storage
Refuce processing
Recedure transport
landfill
Managing solid waste collection
 In the end there must be disposal system of waste.If waste is thrown into the
environment then invironmet pollution will be occurred.so
 Collection bean must have a
large enough space area .
 Municipal authority should
maintain the storage facilities to
avoid unhygainic unstasionary condition
 It is advisable to move from open
dumping to sanitary land filling in a
phased manner.
 And we all should dump waste in a
specific place. And we should not dump
the waste material in a same bean.
 For managing waste a waste management plant should be
stabilished in the farm or industries.
In the waste management plant :
 Biodegrable waste is converted into biogas and humas
 Non biodegrable waste is burned
 Waste which can not be burned is used in land fill.
 In allo management process th main moto is to reduce waste at any
possible way.producing waste can not be stopped.But it can be
reduced,recycle,reuse an lessened.
Thank you
Thank you!!

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Solid waste management using 4 r

  • 1.
  • 2. Prepaired By: Zesrin Rezoana Sylhet Agricultural University
  • 3. What is Waste? Waste- is source in the wrong place at wrong time. Once it finds its rightful place, it will be just as valuable as any other resource Type of waste  Solid  Liquid
  • 4. Sources of agricultural waste • Animal • Plant • Field or Farm The main types of agricultural waste are • biological • Solid • Hazardous Sources & Types of Agricultural Waste
  • 5. Hazardous waste Biological waste Solid waste Main type of waste Animal Plant Farm or field Sources of Agricultural waste Main type of Agricultural waste
  • 6. Solid Waste:  In Simple Words - Solid wastes are any discarded or abandoned materials. Solid wastes can be solid, liquid, semi-solid or containerized gaseous material. Examples of solid wastes include the following materials when discarded:  scrap metal  waste tires  latex paints  furniture and toys and plastic bottle  garbage  vehicles oil an anti-freez
  • 7. Environment pollution by solid waste 42% 12% 15% 31% Not Properly removed Scattered outside the bin Disposed on roadside or drain Disposed on open place
  • 8. Types of solid Waste Municipal Waste: Residential waste: Food waste,rubbish,ashes, special waste Commercial waste: Food waste,rubbish, decomposition &construction waste,occasionall hazardous waste Open areas: special waste,rubbish Treatment plant: Treatment plant waste,composed of residual sludge Industrial Waste: Chemical waste: Chemic Pesticides, fertilizers and other chemicals. agriculture, Heavy metal Mercury,anti-frezzer etc Solid waste: scrap paper,plastic materials,sanitary Toxic and hazzadious waste: Amonia,murcary, CFC Bio-medical waste: pathological waste, pharmaceutical waste, genotoxic waste, chemical waste, and radioactive waste etc.
  • 9. Amount of solid waste genaration in sylhet city 0 50 100 150 200 250 300 2004 2007 2010 2013 2016 2017 100 110 180 210 250 260 Tons/day
  • 10. Objective of managing of solid waste:  Public hygine and health  Reuse,recovery,recycle  Sustainable development  aethetics  And covert waste into source of energy  Going towards minimum wastage
  • 11. Effects of waste if not managed wisely  affects our health  affects our socio economic conditions  affects our coastal and marine environment  Effects our claimate
  • 12. Concept of waste management  Established waste treatment technologies  Composting  Incineration  Landfill  Recycling  Windrow composting
  • 13. Alternative waste management treatment  Anaerobic digestion  Alcohol/ethanol production  production of biomass to mixed alcohol fuels (pilot scale)  Gasification  Mechanical biological treatment  Mechanical heat treatm  Sewage treatment  Tunnel composting
  • 14. Concept of 4R: We apply 4r for waste management . reduce, reuse, recover, recycle to all our services. Wwe actively angage waste generators in managing their waste responsibly.  R for reduce  R for reuse  R for recycle  R for recover
  • 15. Recycle: Means to use materials again in a new formation. Importance of recycle:  Saves limited natural resources  prevent greenhouse gas emissions and water pollutants.  saves energy  provides raw materials for  industry  creates jobs  saves landfill space
  • 17.
  • 18. Reduction: Means to make something smaller . Waste reduction, the combination of waste prevention and recycling efforts. Importance of waste reduction.  waste prevention benefits the environment  makes good financial sense.  benefits society,.
  • 19. Reuse:  Reuse means using reusable old things or product again.  manufacturing new products drains our limited natural resources,  disposing of unwanted materials from environment,  One way to prevent waste,  improve our communities,  provide help to other people who are in need. .
  • 20. Recovery: Resource recovery goes further than just the management of waste. different treatment technologies  In recovery broken materials are reused by fixing  It is economical in the case of pursuing new things  By recovering we can save of money,waste and environment
  • 21. Concept of solid Waste Management Transfer station Transfer vechicle Collection vechicle On-site storage Refuce processing Recedure transport landfill
  • 22. Managing solid waste collection  In the end there must be disposal system of waste.If waste is thrown into the environment then invironmet pollution will be occurred.so  Collection bean must have a large enough space area .  Municipal authority should maintain the storage facilities to avoid unhygainic unstasionary condition  It is advisable to move from open dumping to sanitary land filling in a phased manner.  And we all should dump waste in a specific place. And we should not dump the waste material in a same bean.
  • 23.  For managing waste a waste management plant should be stabilished in the farm or industries. In the waste management plant :  Biodegrable waste is converted into biogas and humas  Non biodegrable waste is burned  Waste which can not be burned is used in land fill.  In allo management process th main moto is to reduce waste at any possible way.producing waste can not be stopped.But it can be reduced,recycle,reuse an lessened.