Image
Landfill mining to develop the area in housing area in Veenendaal
Published on 26 February 2019
Netherlands
Utrecht
This is the good practice's implementation level. It can be national, regional or local.
About this good practice
Options to expand the town Veenendaal was mainly possible on the south-eastern side. Unfortunately, two landfills, Benedeneind and Engelage, were located in the middle of the housing development area and thus created a major obstacle for this housing development.
A remediation study concluded that complete removal of 54,000 m3 of waste along with separation of material into partly reusable fractions was the preferred and the most economic option. The increase in the price of land, together with a subsidy from the province of Utrecht, made the complete removal economically viable.
A vertical cut off wall of High Density Poly Ethylene (HDPE) was installed. The groundwater level was lowered. Extracted groundwater was slightly contaminated with mineral oil. This groundwater was treated on-site (aerated lagoons) and then pumped into the nearby sewer system.
In total, 80% of the excavated waste was treated in a separation process resulting a reusable fractions within the city development project (soil, sand and rubble). The remainder (20%) was transported to a sanitary landfill where landfill tax was paid. This remainder consisted mainly of plastic, car tyres and asbestos. Polluted underground was removed and transported to an off-site soil cleaning facility.
Stakeholders:
• Municipality of Veenendaal
• Province of Utrecht (subsidy for the project))
• Regional water board
• Roseboom (contractor)
A remediation study concluded that complete removal of 54,000 m3 of waste along with separation of material into partly reusable fractions was the preferred and the most economic option. The increase in the price of land, together with a subsidy from the province of Utrecht, made the complete removal economically viable.
A vertical cut off wall of High Density Poly Ethylene (HDPE) was installed. The groundwater level was lowered. Extracted groundwater was slightly contaminated with mineral oil. This groundwater was treated on-site (aerated lagoons) and then pumped into the nearby sewer system.
In total, 80% of the excavated waste was treated in a separation process resulting a reusable fractions within the city development project (soil, sand and rubble). The remainder (20%) was transported to a sanitary landfill where landfill tax was paid. This remainder consisted mainly of plastic, car tyres and asbestos. Polluted underground was removed and transported to an off-site soil cleaning facility.
Stakeholders:
• Municipality of Veenendaal
• Province of Utrecht (subsidy for the project))
• Regional water board
• Roseboom (contractor)
Resources needed
Total project fee amounts 4.500.000 euro (including landfill tax).
The increase in land value together with a provincial subsidy funded the project.Three person staff from Grontmij were involved in project preparation and remediation supervision. From the contractor > 20 people were involved.
The increase in land value together with a provincial subsidy funded the project.Three person staff from Grontmij were involved in project preparation and remediation supervision. From the contractor > 20 people were involved.
Evidence of success
• In total 80% of the excavated waste was extracted for re-use;
• Certain hot spots in the underlying soil were remediated completely;’
• Future land development (land value increase) paid for the remediation.
• Certain hot spots in the underlying soil were remediated completely;’
• Future land development (land value increase) paid for the remediation.
Potential for learning or transfer
This practice is very suitable in regions where there is high land pressure and the land value can be potentially high. As the landfill mining project also allows reuse of materials, it also generates some revenues and reduces the costs for primary materials. It contributes to a Circulair Econmy and reduces CO2 emissions.
Further information
Website
Good practice owner
Organisation
www.sweco.nl
Netherlands
Utrecht
Contact
project manager