Reuse of solid organic waste to produce biogas and compost as a circular economy process in an underground mining unit

The main objective of the project is to carry out a cost-benefit analysis for the use of organic solid waste generated in a specific mining unit. Likewise, the main parameters that influence the treatment of organic waste to obtain biogas and compost are determined. The proposal evaluates an underground mining operation that generates around 1.35 tons of organic solid waste per day. The process of obtaining biogas requires the evaluation of various factors such as the composition of the waste, temperature, pH of the process, among others. The cost-benefit analysis of the project to implement a biogas plant analyzed is feasible, since two proposals can be implemented. The first one requires a total investment of 54,738 soles, generating an annual profitability of 5,192 soles. The investment recovery time being 10.3 years. A second proposal requires a total investment of 41,738 soles, generating an annual return of 4,914 soles with an investment recovery time of 8.5 years. The first proposal provides a biosol (fertilizer) production of 57.30 m³ and 0.42 tons of biosol (compost); On the other hand, for the Second proposal it determines that a production of 57.30 m³ of biol and 0.01 tons of biosol will be obtained.