Mathematical modelling of a sustainable energy system for restaurant communities: Waste-to-H2 conversion, CO2 sequestration, clean fuel production, and power generation

Abstract

This study presents a comprehensive mathematical simulation using Simulink software for a novel hybrid waste-to-energy sustainable system tailored for restaurant communities. The system integrates a microbial fuel cell with subsystems for biodiesel production, anaerobic biogas digestion, methane reforming, and methanol production. The hybrid system aims to convert 500 kg of waste cooking oil, 2000 kg of food waste, and wastewater produced daily by the community into valuable resources. Results revealed that the system can produce 319,376 kWh of electricity, 14.6 t of H₂ gas, 116.8 t of CO₂ and 525 m³ of purified water annually. These outputs provide a net saving/profit of $245,530 with a return on investment of just 6 months. Additionally, the system demonstrates environmental benefits by reducing annual emissions by 200 tCO₂ and 27.450 tCH_4. The findings highlight the hybrid system's effectiveness in mitigating environmental impact, generating clean energy and valuable fuels, and advancing sustainable waste management practices within restaurant communities.