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Optimisation of bottom ash treatmentRogier van de WeijerBusiness Development Director
The Incinerator Ash Company
Goals of recycling bottom ash
Convert ash into valuable raw materials
1. Recovery of (non ferrous) metals down to 0,5 mm
2. Reuse ash minerals in alternative markets (NL – Greendeal - non IBC)
3. Decrease carbon footprint for WtE facilities
Technical challenges:
• Wet de-slagging at WtE facility
– This makes the ash stick together tightly
– Embedded fine NF particles are hidden in clogged minerals
• Separating heavy / light non ferro’s:
– Conventional sink-float operations are not build for particle sizes < 10 mm
• Practical knowledge and experience (how does theory work out in practice ?)
• Discharge of ash residue that is qualified as waste (EURAL Code 19.12.03)
Financial challenges:
• Optimise the balance between costs (CAPEX and OPEX) and revenues related with bottom ash recycling
• Make use of low cost technologies and create the highest possible value from recovered materials
Strong foundation
• Inashco BV is a 100% Fondel company.
• Valorization of DUT technology
• Continuous R&D at DUT laboratory (CiTG)
Plants in Europe
Heros Sluiskil560.000 t/a
AEB Amsterdam300.000 t/a
VGM Zevenaar100.000 t/a
Attero Wijster180.000 t/a
Indaver Doel100.000 t/a
Attero Moerdijk270.000 t/a
Twence Hengelo170.000 t/a
MAV Erftstadt250.000 t/a
Etappi, Vaasa30.000 t/a
CUF Maastricht
CUF Sluiskil
Mobile Test unit
J & N, Mila150.000 t/a
HSY, Helsinki30.000 t/a
Planned / Under construction
In operation
Company characteristics
Inashco characteristics:
• Installed base of 9 BA processing installations and 5 installations under
construction
• Installed base of 2 Central Upgrade Facilities to further separate non ferrous
concentrate into high quality scrap products
• Current annual treatment > 2,5 million tons of bottom ash,
Capacity under construction > 1.000.000 ton
• Employees > 120
Conventional BA treatment proces
Sink / Float
HNF
LNF
Relative low efficiencyHigh % NF metals rest in Bottom Ash
BottomAsh
Conventionaltreatment
Sieve / Magnets / ECS
NF concentrate sold to Sink/Float
Fine HNF & LNFlost in Mineral fraction
Inashcotechnology
4 8 12 16 2000%
100%
fraction (mm)
NF Metal recovery
conventionaltechnology
Added value in fine fraction
Technical challenges
Knowledge
• Theoretical knowledge of the Delft University of Technology
• Experience of current annual treatment of > 2,5 million tons of bottom ash
• Characterisation of specific bottom ash flow:
– Inashc0 Laboratory:
• Moisture content
• Particle size distribution
• NF contents (heavy and light NF characterisation)
– Operatability test
Installation examples
Bottom ash ���� Mineral aggregates
Dutch legislation - CUR 116
• 20% - 30% replacement of primary
gravel and sand
AEC Aggregate application
AEC aggregates replace primary gravel and sand in concrete products
AEC Aggregate application
Concrete blocks Sewer pipes
Central Upgrading Facility
• Further treatment of NF concentrate from ADR operations
Central Upgrading Facilities
Financial Impact
• ADR Technology:
– Low cost
– No impact on environment (no waste water, no extra dust, marginal use of
electricity)
• Central Upgrading Technology:
– At same cost level as sink-float operations
– No impact on environment (no waste water, no emissions, marginal use of
electricity
• High quality scrap represents best possible value from available ash contents
• Off take through Fondel marketing and trading channels guarantees
premium prices
ADR build up at AEB Amsterdam
To summarise
Convert ash into valuable raw materials
1. Recovery of more non ferrous metals down to 0,5 mm
2. Reuse ash minerals in alternative markets (NL – Greendeal - non IBC)
3. Decrease carbon footprint for WtE facilities
Questions ?
www.inashco.com
Rogier van de Weijer
Business Development Director
Inashco BV
Portnumber 3115
Petroleumweg 32d
3196 KD Rotterdam
The Netherlands
T +31 10 23847507
Don’t waste your Ash!
