waste management-envs (1)

8/2/2019 Waste Management-Envs (1)

1/25

SOLID WASTEMANAGEMENTBy:


2/25

CONTENTS Introduction

Types and description

Key aspectsModern waste management systems

Recommendation

Conclusion


3/25

WHAT IS WASTE..? Waste (also known as rubbish, trash, refuse, garbage,

orjunk) is unwanted or unusable materials.

According to United Nations Statistics Division(UNSD) it isdefined as

"Wastes are materials that are not prime products (thatis products produced for the market) for which the

generator has no further use in terms of his/her own

purposes of production, transformation or

consumption, and of which he/she wants to dispose.

Wastes may be generated during the extraction of raw

materials, the processing of raw materials into

intermediate and final products, the consumption of

final products, and other human activities. Residuals


4/25

TYPES:Municipal Solid Waste(MSW)

Construction Waste Industrial Waste

Medical Waste

Hazardous Waste (Radioactive , Electronic)


5/25


6/25

Construction waste consists of unwantedmaterial produced directly or incidentally bythe construction or industries . This includes

building materials such as Insulation,nails, electrical wiring, and rebar, as well as

waste originating from site preparation such

as dredging materials, tree stumps,and rubble.


7/25

INDUSTRIAL WASTEAny liquid, gaseous, or solid waste resulting fromany process of industry, manufacturing, trade, or

business or from the development of any naturalresource.

Sources of industrial waste are:

Chemical industriesMetal and Mineral processing

industriesNuclear power plants

Thermal power plants


8/25


9/25

Hazardous Waste


10/25

KEY ASPECTS OF WASTE MANAGEMENTWaste disposal

Waste processing

Waste recyclingWaste minimization


11/25

disposal processing

recycling minimization


12/25

WASTE DISPOSAL Land filling

Composting

Incineration Anaerobic digestion

Mechanical biological treatment


13/25

Land Filling

Incineration Composting


14/25

Machines compact the clayto meet required densityand depth.

Looking right to left we find thebottom clay liner, the top doublesynthetic liner, and then gravelbeing applied by bulldozers.

Landfills


15/25

PREVENTING GROUND WATER POLLUTIONIN A LANDFILLAn adequate liningsystem is a necessarycomponent for any

landfill. The liner isdesigned as abarrierto intercept leachateand direct it to a

collection system topreventcontamination oflocal groundwater.

Liner


16/25


17/25

CONCERNS OVER INCINERATION

Incineration recovers

energy that wouldotherwise be lost

Requires less land

Reduces odor but

Emits dangerouscancer causingcompounds called

dioxins

Does the Fume

ContainDioxins?


18/25

Anaerobic Digestion


19/25

Mechanical

biological

treatment


20/25

MODERN WASTE MANAGEMENT

SYSTEMS

These three Rs saves money, energy , raw materials, land spaceand reduces pollution.


21/25

REDUCE:

Reduction in use of raw materials will correspondingly decreasethe production of waste.

Reduced demand for any metallic product will decrease themining of their metal and cause less production of waste.

REUSE:

The refillable containers which are discarded after use

can be reused.Making rubber rings from the discarded cycle tubes whi

are used by the newspaper vendors , instead of rubber

bands, reduces the waste generation during

manufacturing of rubber bands.


22/25

Recycling is the breaking down of materialsfrom waste streams into raw materials,

which are then reprocessed either into thesame material (closed loop) or a new product

(open loop), generally including wasteseparation and material reprocessing.


23/25


24/25

recommendation

Keeping yards free of rubbish.Securing rubbish bins against scavenging dogs, rats

and other animals.Not illegally dumping waste, especially hazardous

and toxic waste.Dont dump your cell phone, recycle it.Educate people about effects and its prevention.

Take part in community awareness campaigns.Segregate household wasteWaste of one could be input or raw material for others


25/25

conclusion

Think Globally Act Locally

waste management-envs (1)

Documents