SEPARATION, PROCESSING AND
- Khalid Omer
- Mohamed ELhadi
- Eltohamy Elshamy
Environmentally sound management of increasing amounts of solid
wastes is among the topics of major concern today in most cities. The
logical starting point for solid waste management is to reduce the
amounts of waste that must be managed, that is, collected and disposed
of as nuisances and hazards. Waste management could be a very
intricate problem if there is a need for such a system to be implemented
within a society. Training the people how to separate their wastes,
choose the best technology for treatment the wastes, controlling the
environmental impact of waste treatments method and many other
economical and technical aspects make the MSWM as a complicated
Separation and processing of solid wastes:
There are several techniques for separation of MSW
such as :
1- Size Reduction:
Collected waste materials are mechanically reduced in
size using shredders, glass crushers, wood grinders,
It is used to separate mixtures of materials of different
size into two or more size fractions by means of one
or more screening surfaces e.g. vibrating screens,
rotary screens, disc screens, etc.
3- Magnetic Separation:
Ferrous metals are separated from other waste
materials by utilizing their magnetic properties.
Key concepts in municipal waste
all means of reducing the amounts of waste that must be collected
and disposed of by solid wasteauthorities and prevent
recyclables and compost able organics from entering final waste
any procedure to reduce wastes at the point of generation, in
contrast to sorting out recyclable components after they have
been mixed together for collection.
Recycling: the process of transforming materials into
secondary resources for manufacturing new products.
Redemption center: waste trading enterprise that buys
recyclable materials and sells to brokers. Sometimes also called
Resource recovery means the obtaining of some
economic benefit from material that someone has
regarded as waste. It includes
being used for the same purpose again.
* recycling : processing material so that it can be
used again as the same material
*conversion : processing the material to make
* energy recovery: usually referring to the burning of
waste so that the heat can be used.
Materials Recovered from Municipal solid Wastes