Abstract
In order to effectively solve the hazardous chemical waste location-routing problem, based on the existing literatures, this paper considers chemical waste production and uncertainties in the processing technology, and establishes a multi-objective optimization calculation model involving transportation and location risks, costs and risk equity. It uses an example to verify the proposed model, and then establishes a measurement method with location-routing risk equity based on the fuzzy description of the chemical waste production by the triangular fuzzy membership function. The calculation model takes into account the variable cost and location risk of the waste disposal centre, reducing the error from single-objective calculation. Through the inverse fuzzy algorithm, the multi-objective fuzzy model is converted into a multi-objective linear model. The verification results of the example show that: if the variable cost is not considered, the total risk is increased by 110.68%; if the location risk is not considered, the cost is increased by 21.35%; if the risk equity is not considered, the total cost is decreased by 8.71%, while the risk is increased by 48.32%, which proves that the combinatorial optimization of multi-objective function model established will lead to a slight increase in cost, but a significant reduction of related risks, thus making the location-routing scheme more in line with the actual situation and needs.
