Management of waste & processing of solid waste

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

16. Waste Recycling :

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.

24. Thank you
Thank you!!