|
Year
:
2000
Sorting
capacity
:
3
x
20
T/h
Principals
:
Itradec
-
Mons
(Belgium)
The
plant
is
designed
to
sort
domestic
waste
into
4
fractions
:
|
|
Fermentable
organic
matter,
for
biomethanisation.
Combustible
matter
(paper,
carton,
plastic...)
for
energy
recovery.
Scrap
iron,
recoverable
in
the
iron
industry.
Inert
matter
(glass, stones, lime)
for backfill, road basements etc.
|
|
Waste
collection
hall
|
Main
separation
principles
Magnetic
separation
-
to
recover
iron
scrap.
Granulometric
separation
-
to
extract
combustible
matter.
Densimetric
separation
-
to
separate
fermentable
matter
from
inert
matter.
|
|
Overband |
Magnetic
separation
After
opening
the
bags
and
discharging
waste
on
a
conveying
belt,
an
overband
(i.e.
an
electro-magnet
or
permanent
magnet)
is
used
to
collect
the
iron
particles
and
separate
them
from
the
matter
flow.
A
magnetic
pulley
is
used
to
collect
the
scrap
iron
particles
hiding
underneath
the
waste. |
|
|
Granulometric
separation
This
stage
is
based
on
the
difference
in
size
of
the
domestic
waste
components.
The
combustible
fraction
is
known
to
be
larger
than
50
mm;
therefore
the
waste
is
sent
into
a
50
mm
mesh
rotary
screen,
called
"trommel".
The
refuse
will
mainly
be
composed
of
combustible
particles,
whereas
the
undersized
material
will
be
a
mix
of
inert
and
organic
matter.
.
|
|
Trommel
|
|
Densimetric
table
|
Densimetric
separation
At
this
stage,
separation
is
based
on
the
difference
in
density
between
fermentable
organic
matter
and
the
heavier
inerts.
Under
an
ascending
air
flow,
the
heaviest
materials
settle
on
the
densimetric
tables,
whereas
the
lighter
fractions
come
to
the
surface.
Since
the
tables
vibrate,
the
heaviest
products
tend
to
move
upwards
on
the
slightly
ascending
tables
and
the
lighter
ones
flow
downward. |
|
|
An
original
process
The
originality
of this entirely
automated process lies in
the
way
the
successive
stages
of
the
sorting
unit
are
being
organized.
The
process
can
easily
be
adapted
to
differences
in
the
waste's
range
and
mix.
|
|
Evacuation
of
VCC |
|
|
Environment
