Abstract
The number and capacity of mechanical-biological treatment (MBT) plants in Europe increased significantly in the past two decades as a response to the legal obligation to limit the landfilling of biodegradable waste in landfills and to increase recycling and energy recovery from waste. The aim of these plants is to prepare residual municipal waste for recovery and disposal operations, including especially separation and stabilization of the easily biodegradable fraction (the biofraction). The final products of MBP technology are recyclables, stabilate, high calorific fraction which is used for the production of refuse derived fuel (RDF) and the remaining residual fraction. The shares of the output fractions, especially of the recyclables and RDF determine the overall efficiency of MBT technology in diverting waste from landfills. In this paper results of an assessment of one exemplary MBT plant are provided. The analysis was performed within a comparative study in which 20 selected MBT plants in Poland were subject to a detailed analysis, focusing, both at the design parameters as well as operational ones. The selected plant showed relatively higher overall materials recovery efficiency. With the view to circular economy targets, increased automation of the mechanical waste treatment will be required to support achieving high level diversion from landfills. The study reviled that stabilisation of biofraction should be improved by a better control of process conditions, especially moisture content.
Highlights
Majority of the municipal residual waste in Poland is treated in regional mechanicalbiological treatment (MBT) plants
As the summary capacity of MBT plants and waste incinerators exceeds the amount of residual waste, which is decreasing due to rising levels of separate collection, the competition on the waste market becomes severe
The aim of biodrying is to reduce the moisture content of waste in order to improve the calorific value of the combustibles, which are used for the refuse derived fuel (RDF) production
Summary
Majority of the municipal residual waste in Poland is treated in regional mechanicalbiological treatment (MBT) plants. The total amount of municipal waste collected in Poland in 2015 was 10863 thous. Mg was collected as residual waste [2]. Mg of residual waste was treated in MBT plants. In the period 2015–2016 six new incineration plants have been commenced with the total capacity of. As the summary capacity of MBT plants and waste incinerators exceeds the amount of residual waste, which is decreasing due to rising levels of separate collection, the competition on the waste market becomes severe. In Poland the MBT plants accept both the residual waste as well as separately collected waste to sort and prepare it for recycling
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