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Abstract
Abstract This document shows a model that seeks the sustainability of the Usable Solid Waste (USW) market in Bogotá, based on System Dynamics (SD), in order to understand the complex behavior of the phenomena that should be presented in this city market in the context of sustainability. Dynamic hypothesis suggests that two negative feedback structures exits, one that represents demand and another that represents supply and that interact under the assumption of free market with government intervention. Different strategies were modeled on both the demand side and the supply side to manage the system. As conclusion, the linear way in which the USW market currently develops is not adequate. It is necessary to institutionalize the market using the price so that it contributes to its sustainability and that both demand and supply are encouraged at the same time. Besides, district policy oriented to supply must be in accordance with the national policy that encourages demand to use more USW. Likewise, the internalization by all the actors of the market and applicability of the norm is required. The creation of public-private partnerships is required for the development of innovative projects in this area.
Highlights
This document shows a model that seeks the sustainability of the Usable Solid Waste (USW) market in Bogotá, based on System Dynamics (SD), in order to understand the complex behavior of the phenomena that should be presented in this city market in the context of sustainability
Among the strategies proposed are those that directly intervene the use by recycling organizations (URRO) and those that affect the demand for USW (RNID) (Figure 5)
Based on the judgment of experts and the review of the literature, the weight given to the effect of the foreign trade policy on the rate of net increase in demand was, 15%, on research 25%, and it is considered that the effect of the tax reductions corresponds to 59%
Summary
System Dynamics was applied as the methodology because the solid waste system of the city is a nonlinear and a temporary problem. From the Statistical System of Foreign Trade (SIEX, by the Spanish acronym) of the Directorate of National Taxes and Customs (DIAN, by the Spanish initials) established the prices of imported virgin raw material that is substitute for solid waste usable in the processes of production of goods. Based on this information, an aggregate mathematical model was constructed with which general conclusions were reached for the institutionalization of USW. It can be used in an aggregate way, as a whole, and not of specific usable waste which behavior is particular; this is the case, for example, of glass, where the percentage of use is 50% or that of plastic in which 11% is used, while the organic material goes almost entirely to Doña Juana Landfill
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