Light weight packaging sorting plants control 3 To ascertain the efficiency of the processes, several control operations must be performed at the packaging sorting plants regarding performance, quality of sorted materials and operator performance. Ecoembes carries out several controls at the sorting plants to analyse their operation. Input material characterisation As mentioned in section 2.2, quality control is performed for the quality of selected waste arriving at the sorting plants in order to determine the quality of the selective collection, supply data needed to calculate effectiveness in the sorting plant, obtain information about material streams in the sorting processes and determine the potential for package recovery in selective collection. To this end, an analysis of the waste is performed known as characterisation. Waste characterisation consists in determining the composition of waste by a standardised test, controlling the error in the estimation of non-targeted material percentage with a 5% margin of error. The procedure followed to characterise the collected waste is described below. The aim is to obtain a sample that is as homogeneous as possible on which to perform the sorting of material: 1. Depending on the plant characteristics and the purpose of the work, the sample can be taken from the following points: • Directly from the collection vehicles upon arrival at the sorting plant.
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