MBT demonstration project in Tunisia
© Wasteconsult international (5/2015)
Tunisian waste is rich in organic and hence fairly wet. This causes technical Problems and adverse environmental effects when landfilled. But next to the formation of leachate and landfill gas also operation problems were observed especially at pit landfills because of unsufficient drainage of the leachate which resulted in situations that the whole waste is soaked with leachate and hence the mechanical stability is reduced. The main objective of the pilot test was to prove that the PMB is a feasible solution for the conditions in Tunisia and an adequate option to overcome some of the Problems mentioned above.

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.

Landfill Mining – Case Study: Resource Potential of a Styrian Sanitary Landfill Site
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2014)
During the last years, noticeable changes in the availability of mineral raw materials (e.g. ores, coal) were observed due to an enormous raw material demand of developing countries (e.g. China). Subsequently, a sensible scarcity of raw materials, highly competitive markets and a significant aggravated accessibility to mineral resources have been noticed.

Utilization of Treated Solid Waste Combustion Residues in Reconstruction and Vertical Air Space Extension of Landfills
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2014)
In this contribution, the utilization of processed MSWI – combustion residues (i.e. bottom ash & slags) for the reconstruction of landfi lls during vertical expansion of airspace is reported. It is shown, that from 250 kg/tonMSW bottom ash generated during combustion, 6 – 7 % FE-metals, 1 – 2 % NON-FE metals and over 90 % minerals (mainly a mixture of CaO, Al2O3, Fe2O3, and Silicates) can be recovered in a processing plant. Using the so called „Concrete Stabilized Perimeter Berm“ method, where parts of the mineral fraction are mixed with cement, sand and water to form concrete for slope construction during the vertical airspace expansion, slope steepening from 1(V): 3 (H) to 2(V) : 3 (H) with simultaneous increase of landfill height from 30 m-45m can be achieved, resulting in airspace gaining.

Sustainable re-use of closed landfills in the EU
© NMC Ltd. (10/2010)
Closed landfills take up a considerable amount of space in many countries. It is estimated that there are up to 150,000 closed landfills in Europe. Many locations are situated near the edge of cities and villages. In terms of efficient space usage, closed landfills can provide alternative locations for companies, offices, golf courses, city parks or ski runs, for greenhouse farming or the cultivation of forests. However, many closed landfills may also pose a risk to the environment or public health.

Greenhouse gas emission reduction by aerobic treatment of old landfills
© European Compost Network ECN e.V. (10/2008)
Old landfill have a big contribution to greenhouse gas emissions an should be treated in the future worldwide to avoidlandfill gas emissions. Even in industrialized countries old landfills have a big contribution to the greenhouse effect.



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