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A new method is presented to quantify the potential of a system to concentrate or dilute substances. The approach is based on a comprehensive material flow analysis and Shannon's statistical entropy function that is transformed by a three-step procedure. The result is a new function that can be applied to any defined system with known mass-flows and substance concentrations. In combination with materials balances, the method yields quantitatively the Relative Statistical Entropy (RSE) and the Substance Concentrating Efficiency (SCE) of a given system. When applied to compare five solid waste incinerators of increasing technology levels, the method (1) gave evidence of the potential of modern incinerators to control material flows and (2) pointed to future directions for further improvement of incineration technology. Case studies demonstrate that the new tool is well suited to support and complement existing methods for decision making in waste and resource management such as LCA.
Rechberger et al. (Fri,) studied this question.
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