The study published in Scientific Reports presents an innovative method for sustainable recycling of used engine oil using methyl ethyl ketone (MEK) and 1-butanol solvent extraction with activated carbon adsorption. This technique, developed by researchers from Addis Ababa Science and Technology University and Mohan Babu University, demonstrates a significant reduction in energy consumption (65% compared to thermal treatment) and a carbon footprint that is 65% lower than traditional methods.

From an ESG perspective, this development offers a promising solution for waste engine oil management, particularly in developing economies where recycling infrastructure is underdeveloped. The method achieves high recovery efficiency (65.2%) while meeting ASTM specifications for density, kinematic viscosity, and flash point.

The economic analysis indicates that, under optimized conditions, the process can generate net profit of $10.00 per batch at a market price of $2.50/L. Optimization strategies, such as solvent recovery and scale-up to larger batches, could further reduce production costs, making the process commercially viable. This research aligns with the UN Sustainable Development Goal (SDG) 12: Responsible Consumption and Production, and the Task Force on Climate-related Financial Disclosures (TCFD) recommendations regarding waste management and resource efficiency.

For investors, this innovation could potentially lead to opportunities in the waste management sector, especially in emerging markets where the need for sustainable solutions is particularly acute. Regulators can support this development by providing incentives for decentralized used oil recycling and promoting the adoption of eco-friendly technologies. Communities, in turn, will benefit from reduced environmental pollution and improved public health due to the minimization of hazardous waste disposal.

Overall, this study represents an important contribution to the field of sustainable waste management and offers a potential pathway towards more efficient and environmentally friendly used engine oil recycling in resource-constrained settings. Further research is needed to evaluate the scalability and long-term economic viability of the technique in various geographical contexts.