Sustainable Redevelopment of an Uncontrolled Dumping Site into an Integrated Waste Recycling and Treatment Centre, Moen, Belgium

Dr. S. HelsenZagreb25/11/2010

Intermunicipal Organisation IMOG

Intermunicipal waste organisation in Flanders (BE):11 municipalitiespop. 227.000

Yearly turnover26 million euro (2009)

200 employees

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IMOG Objectives

Treatment of household waste through sustainable waste management

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Overview landfill expansionsand current activities

Initiatives reduce and recycle waste

Business planfor expansionof landfill

Old landfill covered and remediated

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Clay quarry & landfill expansion

Excavation of quarry for brick industry

Excavated clay reused as seal

Covered landfill partly developed as treatment centre for dredged sediments

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Secondary use covered landfill

Delivery of cat. 1 waste (industrial waste) reducedEmphasis on cat. 2 waste (mainly household waste)

Groundwater pollution (metals, salts,…) landfill leachate constitutes risk to environment and nearby waterway

To prevent further spreading soil remediation project

Hydrogeologically isolating entire landfill site

Groundwater protection

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Impermeable cement-bentonite slurry wall around landfill site

Wall to depth of 20 m below groundsurface

Quality control procedure to ensure depth was reached

Groundwater flow and water levels calculated by modeling and compared to field data

Groundwater protection

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Wastewaters evacuated to biological treatment plant:

Rain Water seeping through the landfill Runoffs Wheel washing residues Domestic waste water

Optimal treatment efficiency through operatedand monitored facility

BATNEEC principles

Wastewater treatment

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Green buffer of 6 m wide Integrated in existing landscape Maximizes ecological potential with native plants Corridorfor local faunas

Visual hindrance

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Management of waste fractions

Processing through incineration (Harelbeke site) 1.6 billion kgProduction of electricity 600 m. kwhRemoval through landfill 1.5 billion kgSelective collection of paper and cardboard 220 m.kgSelective collection of glass bottles and jars 100 m. kgComposting of green waste 300 m.kgProducing and marketing of compost 75 million kg

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Collected quantities waste fractions civic amenity sites

Operation of 16 civic amenity sites

Separate collection of 40 waste fractions

Differential pricing applied: pay according to type and quantity of materials following ‘polluter pays, the preventer saves’

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Sorting centers for: bulky waste sorting line wood waste sorting cleaning line

Manual and mechanicalsorting for: paper and cardboard inert building materials wood, plastics, ....

Non-recyclable fractionsent to compactor

Sorting centers for bulky waste

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Wood waste segregated into: untreated treated, uncontaminated contaminated

Crushed and sieved into fractions

Used as biomass for energy and/or MDF wood

Wood sorting centre

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Green waste sorting and processing important

Respond to demand new equipment: trucks, sieving and shredding machinery new composting and maturation areas constructed building of area for sieved compost quality label developed and compost market explored

30.000 ton green waste to composting installation

13.000 ton compost and 3000 ton wood chips sold on local market

Composting

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Street sweep refuse picked up by brush or sweep trucks

Litter, sand, leaves and small branches

Optimization of waste sorting line

Waste cleaned and segregated: sand fraction reused as a secondary raw material plastic metal green waste combustible waste

Treatment street & sweep refuse

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High demand treatment dredged sediments fromnavigable and non-navigable waterways

Development of treatment centre for dredged sediments

Dredged sediments : Arrive by ship over the adjacent waterway Dewatering Material excavated and removed once dry Use for final landfill cover or as filling materials in road constructions or noise barriers

Treatment dredged sediments

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1999 selective collection, sorting and treatmentof wood waste

Wood collected at civic amenity sites: recycled(production of MDF board)

2005 non-recyclable wood: biomass power plant(green energy)

Every year 30.000 ton of biomass produced =41 million kWh = electric consumption for pop. 32.000

Biomass centre

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Potential landfill gas extraction

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12 vertical wells &Horiz. HDPE pipesto central location

> 500 m³/hrcombustion engine electricity

< 500 m³/hr:Micro turbine electricityFlare system

Landfill closed: after care and monitoring for 30 yrs

Site developed cfr. local / regional planning regulations

2 ha of solar panels on old landfill Electrical energy used on site; excess: through the grid

Entire landfill ‘closed’ 10 ha of photovoltaic cells Energy for 1500 families

Solar energy park

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Success based on :

Use of various communication methods Public awareness Education encouraging waste prevention and Improving sorting at source Secondary materials quality Creates social basis for waste management practices

Aim: export technical and operational knowledge

Collaborations with EU partners in transitional and developing countries, incl. Western Balkans

Exporting forty yearsof knowhow

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Waste :

Source for secondary materials and renewable energy

Creates job opportunities and profits

Management demands investment with risks

Management requires technical skills, technology, organization and monitoring

Conclusion

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Thank you for the attention

ECOREM NV / SA

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