WP4 AWAST Rennes, November 2001 ISWA / Cemagref Material
Recovery Facility (Sorting Plant) Slide 2 WP4 AWAST Rennes,
November 2001 ISWA / Cemagref Stuttgart has 10 Material Recovery
Facilities (MRFs) 3 sorting plants for packaging, commercial and
demolition waste 2 sorting plants for dismantling of WEEE 1 sorting
plants for construction and demolition waste 3 sorting plants for
paper 1 sorting plant for light weight fraction (packaging) Slide 3
WP4 AWAST Rennes, November 2001 ISWA / Cemagref There is no
standard MRF process Processing depends on: Kind of material to be
sorted Separate collection - how the material was collected
(kerbside, bring system) Commingled collection Target for sorting
(Recycling, RDF) Slide 4 WP4 AWAST Rennes, November 2001 ISWA /
Cemagref Material recovery facility Slide 5 WP4 AWAST Rennes,
November 2001 ISWA / Cemagref Two main separation principles:
Screening/Separation according to sizes Classifying:(screening, air
classification) Sorting: Separation, using the physical character
of the material (magnetic separation, ballistic, eddy current,
etc.) Slide 6 WP4 AWAST Rennes, November 2001 ISWA / Cemagref Flow
sheet of a MRF for Light Weight Fraction Slide 7 WP4 AWAST Rennes,
November 2001 ISWA / Cemagref Large Rejects Plastic films Fe-Metals
Tetra Paks etc. Rejects Aluminium PE - bottles Mixed plastic
Paper/board Cutting shredder Air classifier Magnetic separator Eddy
current separator Roll bankNIR Drum screen Post-Sorting Air
classifier Slide 8 WP4 AWAST Rennes, November 2001 ISWA / Cemagref
Input: Packaging waste Reception area Cutting shredder opens the
waste bags Slide 9 WP4 AWAST Rennes, November 2001 ISWA / Cemagref
Screening Drum screens use a combination of rotation and screening
Slide 10 WP4 AWAST Rennes, November 2001 ISWA / Cemagref Bucket
screen operates like a large drum screen advantage: absolutely
jam-free in severe operating conditions Coarse fraction Fine
fraction Slide 11 WP4 AWAST Rennes, November 2001 ISWA / Cemagref
Inclined sorting machines The Inclined Sorting Machine separates
flat products from body- shaped products, inert material from non-
combustible material. Slide 12 WP4 AWAST Rennes, November 2001 ISWA
/ Cemagref Ballistic separator Separates light and heavy fractions
depending on its physical differences (specific weight) Consists of
a movable and perforated slope which is distributed into several
vibrating segments Slide 13 WP4 AWAST Rennes, November 2001 ISWA /
Cemagref Air classifier Isolates light plastic and paper from the
packaging stream facilitates further separation Blower sucks air up
through the throat, carrying light materials (paper, plastic) which
then enter a cyclone separator where they loose velocity and drop
out of the air stream Slide 14 WP4 AWAST Rennes, November 2001 ISWA
/ Cemagref To directly remove ferrous materials (tinplate cans or
tin lids) floor-mounted or suspended by support beams over a moving
conveyor belt Magnetic separator Slide 15 WP4 AWAST Rennes,
November 2001 ISWA / Cemagref Eddy current separator High-frequency
oscillatory magnetic fields induce an electric current in the
conductive object separates conductive but nonferrous metals from
lightweight commingled waste usually performed near the end of a
separation process useful for separating aluminium from plastic mix
This electric current generates a magnetic field, which causes the
object to be repelled away from the primary magnetic field Slide 16
WP4 AWAST Rennes, November 2001 ISWA / Cemagref Manual sorting
Manual picking stations line one or both sides of the moving
conveyor belt Each picking station usually is devoted to one type
of recyclable material System is less capital intensive but it is
labor- intensive For workers health manual sorting must be
capsulated Slide 17 WP4 AWAST Rennes, November 2001 ISWA / Cemagref
Plastic sorting Automatic sorting by Near Infrared Technique (NIR)
Position and material characterisation are scanned per Infrared
Sensors notice the different reflections by the different plastics
Computers analyse the data and direct blast pipes which remove the
plastics pneumatically from the belt Slide 18 WP4 AWAST Rennes,
November 2001 ISWA / Cemagref Sorting of Light Weight Fraction and
Paper in Augsburg
