International waste management strategiesAhmed Ali
The waste hierarchy refers to the "3 Rs" reduce, reuse and recycle, which classify waste management strategies according to their desirability in terms of waste minimisation. The waste hierarchy remains the cornerstone of most waste minimisation strategies.
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Learn the basic principles and concepts of waste management here. The definition of common terms and the discussion of concepts, principles and waste classification will help you to understand the topic of waste management.
International waste management strategiesAhmed Ali
The waste hierarchy refers to the "3 Rs" reduce, reuse and recycle, which classify waste management strategies according to their desirability in terms of waste minimisation. The waste hierarchy remains the cornerstone of most waste minimisation strategies.
http://socceronlinetv.com/thailand-vs-indonesia-live-streaming/
http://socceronlinetv.com/aff-suzuki-cup-2016-final-live-streaming/
http://socceronlinetv.com/aff-suzuki-cup-2016-final-live/
Learn the basic principles and concepts of waste management here. The definition of common terms and the discussion of concepts, principles and waste classification will help you to understand the topic of waste management.
Waste management is the collection, transport, processing, recycling or disposal, and
monitoring of waste materials.
[1]
The term usually relates to materials produced by human
activity, and is generally undertaken to reduce their effect on health, the environment or
aesthetics. Waste management is also carried out to recover resources from it. Waste
management can involve solid, liquid, gaseous or radioactive substances, with different methods
and fields of expertise for each.
Waste management is the collection, transport, processing, recycling or disposal, and
monitoring of waste materials.
[1]
The term usually relates to materials produced by human
activity, and is generally undertaken to reduce their effect on health, the environment or
aesthetics. Waste management is also carried out to recover resources from it. Waste
management can involve solid, liquid, gaseous or radioactive substances, with different methods
and fields of expertise for each.
1.Introduction
2.Definition
3.Classification
a) based on source or origin
b) based on nature of waste
#Non hazardous or solid waste
#Hazardous waste
4. Health hazards of accumulated solid waste
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2. Solid Waste
• The combined effects of population explosion and
changing modern living standards have a cumulative
effect in the generation of a large amount of various
types of wastes. Solid waste can be classified into
different types depending on their source.
Ø Municipal solid waste (MSW)
Ø Industrial waste
Ø Hazardous waste
Ø Biomedical or hospital waste: as infectious waste.
Ø Agricultural waste
3. • Muncipal Solid Waste (MSW): The term municipal solid
waste (MSW) is generally used to describe most of the
non-hazardous solid waste from a city, town or village
that requires routine collection and transport to a
processing or disposal site.
• Sources of MSW include private homes, commercial
establishments and institutions, as well as industrial
• facilities. However, MSW does not include wastes from
industrial processes, construction and demolition debris,
sewage sludge, mining waste or agricultural wastes.
• MSW is also called as trash or garbage. In general,
domestic waste and MSW are used as synonyms.
4. • Municipal solid waste contains a wide variety of
materials. It can contain food waste (like
vegetable and meat material, leftover food,
eggshells etc.), which is classified as wet
garbage
• As well as paper, plastic, tetrapack, plastic cans,
newspaper, glass bottles, carboard boxes,
aluminum foil, metal items, wood pieces, etc.,
which is classified as dry garbage.
5. • India’s urban population slated to increase from
the current 330 million to about 600 million by
2030, the challenge of managing municipal solid
waste (MSW) in an environmentally and
economically sustainable manner is bound to
assume gigantic proportions.
• The country has over 5,000 cities and towns,
which generate about 40 million tonnes of MSW
per year today. Going by estimates of TERI, this
could well touch 260 million tonnes per year by
2047.
6. Functional elements of MSW management
The municipal solid waste industry has four
components:
• recycling,
• composting,
• landfilling,
• incineration
• and waste-to-energy
7. Primary steps
• Generation, collection, sorting and separation,
transfer and disposal/utilization.
• Waste generation encompasses activities in
which materials are identified as no longer
being of value and are either thrown out or
gathered together for disposal.
• The functional element of Collection includes not
only the gathering of solid waste and recyclable
materials, but also the transport of these
materials, after collection, to the location where
the collection vehicle is emptied. This location
may be a materials processing facility, a transfer
station or a landfill disposal site.
8. • A modern sanitary landfill is not a dump; it
is an engineered facility used for disposing
of solid wastes on land without creating
nuisances or hazards to public health or
safety, such as the breeding of insects
and the contamination of ground water.
9. • Municipal solid waste can be used to
generate energy.
• Several technologies have been
developed that make the processing of
MSW for energy generation cleaner and
more economical than ever before,
• including landfill gas capture, combustion,
pyrolysis, gasification
10. • Municipal solid waste management is more of an
administrative and institutional mechanism
failure problem rather than a technological one.
• Until now, MSW management has been
considered to be almost the sole responsibility of
urban governments, without the participation of
citizens and other stakeholders.
• The Centre and the Supreme Court, however,
have urged that this issue be addressed with
multiple stakeholder participation. Cities in India
spend approximately 20% of the city budget on
solid waste services.
11. Hazardous Wastes
Wastes are classified as hazardous
if they exhibit any of 4 primary
characteristics - physical or
chemical properties of toxicity,
reactivity ignitability and corrosivity.
• Hazardous wastes are those that can cause
harm to human and the environment.
Characteristics of hazardous wastes:
12. Charactersitics
• Toxic wastes are those that are poisonous in small or trace amounts.
Some may have acute or immediate effect on human or animals.
Carcinogenic or mutagenic causing biological changes in the children of
exposed people and animals. Eg: pesticides, heavy metals.
• Reactive wastes: reactive wastes are those that have a tendency to react
vigorously with air or water are unstable to shock or heat, generate toxic
gases or explode during routine management. Eg: Gun powder,
nitroglycerine.
• Ignitable waste: are those that burn at relatively low temperatures (<60o
C)
and are capable of spontaneous combustion during storage transport or
disposal. Eg: Gasoline, paint thinners and alcohol.
• Corrosive wastes: are those that destroy materials and living tissues by
chemical reactions. Eg: acids and base
• Infectious wastes: included human tissue from surgery, used bandages
and hypoderm needles hospital wastes.
13. • Sources: Chemical manufacturing
companies, petroleum refineries, paper
mills, smelters and other industries
14. Effects
• As most of the hazardous wastes are
disposed off or in land, the most serious
environmental effect is contaminated
ground water. Once ground water is
polluted with hazardous wastes, it is very
often not possible to reverse the damage.
• These can be concentrated in the kidneys
and liver and cause damage; they cause
reproductive failure in birds and mammals.
15. • Lead can effect red blood cells by
reducing their ability to carry oxygen and
shortening their life span. Lead may also
damage nervous tissue, resulting in brain
disease.
• Mercury build up in body over long period
of time is known to cause brain damage.
16. Control
• Common methods for disposing of
hazardous wastes are land disposal and
incineration
• Industries need to be encouraged to
generate less hazardous waste in the
manufacturing process.
• Although toxic wastes cannot be entirely
eliminated, technologies are available for
minimizing recycling and treating the wastes.
17. • Integrated pest management practices
(IPM) reduce the usage of pesticides.
• Substitute the use of more toxic materials
with chemicals that are less toxic.
18. Industrial wastes
Source: Food processing industries,
metallurgical chemical and pharmaceutical
unit’s breweries, sugar mills, paper and
pulp industries, fertilizer and pesticide
industries are major ones which discharge
large wastes.
• During processing, scrap materials,
tailings, acids etc.
19. Effects
• The exposure may cause disorders of
nervous system, genetic defects, skin
diseases and even caner.
• The liquid effluents discharged by the
industries contain inorganic and organic
pollutants and they enter into water bodies
causing destruction of fish, formation of
sediments, pollution of ground water and
release of foul odors.
20. Control
• Waste minimization technologies have to be
developed.
• Source reduction recycling and reuse of materials
need to be practiced on a large scale.
• Local communities and voluntary organizations –
awareness
• Land filling, incineration & composting
technologies to be followed. Biogas is obtained
from solid waste treatment of industrial and
mining waste is done for the recovery of useful
products.
21. Agricultural Wastes
Sources
• The waste generated by agriculture includes
waste from crops and live stock. In developing
countries, this waste does not pose a serious
problem as most of it is used
• e.g.dung is used for manure, straw is used as
fodder. Some agro-based industries produce
waste e.g., rice milling, production of tea,
tobacco etc.
• Agricultural wastes are rice husk, ground nut
shell, maize cobs, straw of cereals etc.
22. • i) Gasification: It is the process in which
chemical decomposition of biomass takes place
in the presence of controlled amounts of oxygen,
producing a gas. This gas is cleaned and used
to produce electric power.
• ii) Pyrolysis: It is similar to gasification except
that the chemical decomposition of biomass
wastes take place in the absence or reduced
presence of O2 at high temp. Mixtures of gases
result from decomposition including H2, NH4
CO, CO2 depending on the organic nature of
waste matter. This gas used for power
generation.
23. • Biogas production: Animal wastes, food
processing wastes and other organic
matter are decomposed anaerobically to
produce a gas called biogas.
• It contains methane and CO2. The methane can
provides gas for domestic use.
• The byproduct of this technology is slurry,
settled out the bottom of the digester. This can
be used as manure.
24. • Agricultural waste like corn cobs, paddy
husk, bagasse of sugarcane, waste of
wheat, rice and other cereals, cotton
stalks, coconut wastes, jute waste etc can
be used in making of paper and hard
board.
25. • Waste production can be minimized by adopting the 3 R’s
principle: Reduce, Reuse, Recycle
Ø Reduce the amount and toxicity of garbage and trash that you
discard.
Ø Reuse containers and try to repair things that are broken.
Ø Recycle products wherever possible, which includes buying
recycled products i.e. recycled paper books, paper bags etc.
• These are processes that involve integrated waste
management practices (IWM).
• They can reduce the wastes generated by approximately 50 %.