چكيده به لاتين
The current conventional economic model is based on a linear approach and a one-dimensional view of consumerism and profit maximization; However, this method can not continue in its current form due to nature's limitations in meeting the growing human need for natural raw materials and reducing nature's ability to absorb this increasing waste. Therefore, attention to the strategies of the circular economy approach to move towards sustainable global development is increasing. According to the broad, diverse and sometimes misleading definitions of circular economics, the main requirements for implementation and evaluation of its implementation are the indicators of circular economics.
In the present study,by using the framework of two indicators of circular economy, CEI and VRE, and due to the lack of direct effectiveness of these indicators in the reuse process, which is at the same time simply adapted for the strategy of reuse in the framework of circular economy. By replacing the parameters appropriate to the Reuse strategy in this general framework, a new index for evaluating the productivity of reuse processes was presented.
The REI index is the result of dividing the net value obtained from the use and replacement of a EOL product by the value of the inputs required to reproduce the same material. The efficiency of the process of reusing ferric chloride sludge from water treatment plant as a coagulant in removing turbidity of mineral wastes was done by the new REI index.
According to the collected information, for reducing one unit of turbidity per cubic meter of waste, 0.03 g of ferric chloride sludge and 0.0074 g of polymer coagulant are common in mineral waste treatment, in which case the cost is 0.0192 Euros. Contains. Also, the cost of producing ferric chloride, which is required per gram of sludge for one unit of turbidity reduction, is equal to 0.016 Euros. By calculating the REI index, we will have that this process of reuse one hundred and twenty percent more value of materials and energy used in the production of ferric chloride. Also, in order to investigate the interference effect of changes in various parameters involved in this process, a three-dimensional procedure and contour between these variables were performed, which showed that on average, depending on the change of parameters involved, we will have 80 to 180% re-productivity. As a result, the efficiency of this Reuse process is highly useful.
