Income optimization of a biodiesel, glycerin and soap company using waste cooking oil

Abstract

Objective: Optimize a biodiesel, glycerin and soap production unit using a mathematical programming model (MPM). Determine the optimal quantities of waste cooking oil from different products (ACD₁ = glycerin and biodiesel, and ACD₂ = soap) to optimize the income of a biodiesel producing company.

Design/methodology/approach: To determine the availability of ACD inputs, a stratified sampling was carried out during the period from February 8 to 19, 2021, measuring the ACD generation of the restaurants in the center of the municipality of Texcoco, State of Mexico.The analysis was carried out under the economic approach to the production of a biofuel producing company, taking into consideration 10 decision variables in the objective function (FO), subject to 18 restrictions. The variables were based on the technical requirements to produce 1 L of biodiesel and 1 bar of soap of 400 g, using technical coefficients (input-product). Excel® Solver® was used to obtain a sensitivity report and analyze shadow prices (PS) and reduced costs (CR).

Results: More than $140,000 MNX per month was obtained, ACD₂ is the most scarce and valuable input for the model. Limitations on study/implications: Proper management of the final disposal of ACD allows generating income by producing biodiesel, glycerin and soaps. Findings/conclusions: MPM is the most efficient way to use kitchen waste and transform it into products.