This case study presents in its first part a hands-on assessment of the content of a former landfill which was operated between 1920 and 1985 and accepted all municipal waste streams generated in a predominantly rural environment with tourism as a main economic factor. The assessment was performed – according to the principle “let´s replace assumptions by knowledge” – prior to the complete removal of the landfill Content (volume about 50.000 m3).
The second part gives an overview on the excavation and separation works itself which have been triggered by flood events in summer 2013 (Kössen, a small town located on a river emptying into Chiemsee in Bavaria was the municipality mostly affected by this flood in Western Austria).
The former landfill “Auwirtslacke” is located in Kössen, a Tyrolean municipality directlyon the river Kitzbüheler Ache (in Germany: Tiroler Ache) which flows into Chiemsee, a large lake in Bavaria. It was operated for all kinds of municipal solid waste between end of World War I and the mid 1980ies without whichever emission control. As a part of mayor flood protection measures in the area it was decided to remove the entire landfill (volume about 50.000 m3) in order to give the river more space. The excavation works which are followed by screening and sorting the entire landfill Content started in July 2014 and are scheduled to be finished in May/June 2015.
2 Exploration Phase
In order to have a sound estimate on disposal cost before starting the excavation works a complex assessment on the physical landfill content and its composition to be expected was performed, consisting of
• the evaluation of historical data (which turned out as relatively fruitful compared to similar cases)
• interviews with former operating staff and finally
• the digging of trenches – total length about 800 m, distance between trenches 10and 15 m – on the entire surface down to the landfill body´s bottom.
|Copyright:||© Wasteconsult international|
|Source:||Waste-to-Resources 2015 (Mai 2015)|
|Autor:||Dipl.-Ing. Martin Steiner |
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Aerobe Stabilisierung von Deponien – Technische Lösungen und erste Ergebnisse geförderter Projekte in Deutschland
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2016)
Das Umweltbundesamt schätzt, dass im Jahr 2015 – und damit 10 Jahre nach Ende der Ablagerung von Organik auf Deponien in Deutschland – immer noch über 500.000 Tonnen Methan in deutschen Deponien entstanden sind, die erfasst und behandelt werden müssen.
Comparison of MBT plants with and without upstream Anaerobic Digestion (AD) in terms of moisture Management and achievement of landfill disposal criteria
© Wasteconsult international (6/2015)
In waste industry the trend has developed to treat municipal solid waste (MSW) within an anaerobic digestion process. For this purpose MBT plants with an upstream AD plant were built. In the context of plant monitoring and trials one MBT with AD and one MBT without AD were examined and compared to determine the impact of the AD process. For this, the plant operation, especially the moisture management, the compliance of the landfill criteria and also the economic efficiency of the MBT were investigated.
Methanoxidation in der Deponieoberfläche
© Universität Stuttgart - ISWA (5/2015)
Anaerobe Bedingungen und das Vorhandensein von organischen Stoffen führen in allen Ablagerungen zur biogenen Bildung von Gas. Dies ist natürlicherweise auch in anthropogenen Ablagerungen, die mehr oder weniger zu Recht als Deponiebauwerk angesprochen werden der Fall.
Case study of an MBT producing SRF for cement kiln cocombustion, coupled with a bioreactor landfill for process residues
© Wasteconsult international (5/2015)
The research focuses on the performances of a traditional single stream MBT for SRF production suitable for co-combustion in a cement kiln. Bio-drying of the residual waste is followed by mechanical refining in order to fulfil the quality requirements by the cement kilns. The residues arising from the mechanical refining section are landfilled in a nearby bioreactor-landfill, where landfill gas is collected for electric energy recovery. A detailed mass balance of the system is presented, followed by a Life Cycle Assessment.
Landfill mining option: MBT role and landfill potential danger
© Wasteconsult international (5/2015)
The use of landfills for the disposal of municipal solid waste (MSW) has many technical and regulatory limits. An interesting solution is to recover the bales that have been previously stored in a landfill. After specific mechanical biological treatments (MBT), the contents of the bales can be used to produce a solid recovered fuel (SRF) that can be used for energy purposes. The possibility of producing SRF fuels from a landfill in northern Italy has been studied and is presented in this paper. The MSW extracted from the landfill, the bio-dried material produced by the waste hypothetically treated in a plant for bio-drying, and the SRF obtained after the extraction of inert materials, metals and glass from the bio-dried material have been characterized. Assessed the waste nature, the potential environmental impact of dioxin release from a possible landfill fire has been analysed, applying the Austal2000 model system.