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Chemical Technology • June 2015
Duties and responsibilities of tyre
dealers
• They must register with REDISA.
• When waste tyres need to be collected, REDISA must
be advised.
• Where and when must these waste tyres be collected
by REDISA – ie, quantities and type must be specified.
Benefits and advantages for dealers
• They save because the collection of the tyres is done
at no cost.
• Improves the environmental and corporate carbon
footprint.
• Focus on your core business.
Some current recycling technologies
These include rubber crumbing, pyrolysis technology and
tyre-derived fuels/ kilns technology.
Rubber crumbing
Rubber crumb is derived by reducing scrap tyres into uni-
form granules. The inherent reinforcing materials such as
steel and fibre are removed, along with any other type of
inert contaminants such as dust, glass, or rock.
There is a growing demand for more and more waste
tyres that can be used for end products made from the
rubber, steel and textile derived from processing waste
tyres. Crumb rubber is the result of processing automotive
and truck scrap tyres in particular. During this process
the steel and tyre cord (fluff) is removed, leaving tyre
rubber with a granular consistency. This rubber crumb
is often used in astro-turf as cushioning (where it is
sometimes referred to as astro-dirt), asphalt for tarring
the roads, floor mats, carpet padding, vehicle mudguards
and adhesives.
Currently REDISA works with about 12 recyclers. As
the plan continues to roll out over the next five years,
more recyclers and processors will be supported nation-
ally. In addition, REDISA is currently paying recyclers and
processors an infrastructure development grant (based
on the tonnage of tyres delivered). The R310 per tonne
grant REDISA pays is used to improve infrastructure at
the factories so that output can be increased.
WASTE MANAGEMENT