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Emissions EMS
Research
Pilot project to reduce the aftercare period of a
domestic waste landfill – accelerated decomposition
of organic waste through extensive interval
aeration in BA IV of Landfill Dorfweiher
The district of Konstanz intends to reduce the aftercare
period of landfill Dorfweiher. In situ treatment process
was developed and executed by the University
of Stuttgart, Institute for Sanitary Engineering, Water
Quality and Waste Management (ISWA) in cooperation
with the Engineering Company Lhotzky & Partners,
Braunschweig; with the treatment process, the known
methods will be combined in a project section of Landfill
Dorfweiher and the techniques will be improved.
The Ministry for the Environment, Climate and Energy
Economics of Baden-Württemberg supports the project
financially.
The aeration period is set to be three years. Then the
effects of the aerobic treatment on the landfill are evaluated
during a two-year observation. The results of
the project will play an important role in the required
design and the choice of the final surface sealing.
The aim of the pilot project is to treat the landfill body
aerobically and thus to achieve a discharge from the
aftercare within a foreseeable time period. Using the
proposed method, the conversion and degradation of
the organic constituents in the landfill should be accelerated.
As a result, settlements can be anticipated
and harmful landfill gas emissions can be greatly reduced.
The quality of the leachate can also be improved
significantly. In parallel, in the framework of academic
supervision to the pilot project, further insights will
be developed. In a close temporal and spatial raster
scanning, plenty of measuring data are recorded. For
example, information about the required aeration rates
and pressures as well as the gas, leachate, temperature
and settlement developments can be obtained,
so that the aeration strategy can be optimized. Furthermore,
it is also of interest that how effective is the
exhaust gas treatment of the biofilter, and how much
leachate should be recycled so that the biological processes
in the landfill could run optimally.
The technical constructions and equipment are
constructed in a modular design. After completion of
the project, it would be possible to use some parts of
the technical components for the treatment of another
section of the Landfill “Dorfweiher” or other landfills.
Details of carbon, nitrogen and water balance will be
elaborated. For carbon, it will be only possible mainly
through gas analysis. The results will be evaluated to
the effect, whether the in-situ treatment method can
be transferred to other landfills.
Financing Institution:
District of Konstanz / Ministry for Environment,
Climate and Energy Economics of Baden-Württemberg
Contact:
Dr.-Ing. Martin Reiser
Dipl.-Ing. M. Rapf
Dipl.-Ing. M. Kieninger
Project Partner:
Lhotzky + Partner Ing. Gesellschaft mbH, Braunschweig
Duration:
12/2009 - 12/2014
A section of the Landfill Dorfweiher with aeration
lances during construction of the biofilter
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