2007:04 Hantering av förpackat livsmedelsavfall - Avfall Sverige

DEWASTER ® - Sorting out the problems of mixed waste
and OFMSW from Hamburg, Germany in connection with trials for the preparation of the project for a
bio gas plant at ETH headed by Hese Umwelt GmbH.
After the tests in Hamburg the mobile test unit was used a for pilot projects in preparation of the
Aarhus and Odense projects mentioned below. Furthermore, in 2004 the mobile unit has been used to
process limited amounts of OFMSW originating from the municipality of Kristianstad, Sweden and
CFW at the factory of NLM Combineering ApS in Vantinge, Denmark.
Aarhus 2003 – Delivery of a full scale 8 tonne/hour DEWASTER®-Plant
In March 2003 EWOC and the municipality of Aarhus signed an agreement for the turn-key delivery of
a full scale DEWASTER® -plant with a capacity of 8 tonnes pr. hour.
Commissioning of the Aarhus plant took place at the end of October 2003. The plant consists of two
DEWASTER® presses each with a capacity of 4 tonnes/hour with DESIZER and FEEDER
equipment and additional equipment for sorting out over-size objects, steel and other metals.
Parallel to production, erection and commissioning of the Aarhus plant, 1,400 tonnes of OFMSW were
processed on the test plant on a site placed at the Optical Sorting Station in Aarhus.
Since its commissioning the permanent plant in Aarhus has processed app. 4,500 tonnes of OFMSW
with satisfactory results. Operations was, however, abandoned in beginning of June 2004 due to a
political decision to stop the supporting source sorting/separate collection schemes in the Aarhus
area.
The Aarhus plant has been conserved in operational state and is expected to be sold by Aarhus Municipality.
Odense 2003 – DEWASTER® used on unsorted MSW
In 2003 a project study funded by the Danish electricity company ELSAM and the Danish EPA (Environmental
Protection Agency; Miljøstyrelsen) and NLM Combineering ApS was carried out at the
MSW incineration facility in Odense, Denmark to determine whether DEWASTER® system was capable
of treating unsorted MSW. During the EPA project the DEWASTER® process was used on a total
of 400 tonnes of unsorted MSW in a total of 30 separate trials.
The findings of the study were that DEWASTER® system was capable of producing bio mass from
unsorted MSW in a quality and quantity (yield) comparable to that derived from OFMSW and to extract
further fractions from MSW suitable for incineration or recycling.
Thus, the project study in Odense suggests that the DEWASTER® system may pave the way for use
of OFMSW in bio gas production without a requirement for source sorting. These are a very promising
results in consideration of the fact that the operation of source sorting/separate collection schemes
have been abandoned in many areas in Denmark (including Aalborg and Aarhus) for the fact that they
are expensive and burdensome for both the citizens and the municipal waste collection companies.
A more detailed description of the process design and the findings of the Odense project is included in
appendix 2. Furthermore, an overwiew of previous DEWASTER® projects is found in appendix 3.
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