At the former landfill Pill in Tyrol, Austria groundwater contamination was caused by high Ammonium loads of up to 20 mg/l. Biodegradable nitrogen was specified as the cause of groundwater pollution by ammonium. However, other substances were hardly noticeable. Ammonium is generated within the landfill body through anaerobic decomposition of organic matter.
In this case an in-situ aeration of the landfill was planned to oxidize biodegradable nitrogen compounds. This securing system with the best price/performance ratio was selected as part of a comparison of concepts based on the emission prognosis. If the organic available nitrogen within the systemis degraded, an anaerobic conversion of the existing carbon compounds with the formation of ammonium is no longer possible. The special feature is that the in-situ aeration was planned in such a manner, that the unsaturated zone and the landfill body behave like a biological fixed-bed reactor. The landfill surficialarea itself represents a biofilter for any escaping pore-air. Through a network of a total of 216 wells, the landfill area of approximately 18 ha is supplied with air.
|Copyright:||© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben|
|Source:||Depotech 2014 (November 2014)|
|Autor:||Dr. Ing. Klemens Finsterwalder |
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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.