لعريقي, الزهراءكرراز, أمالباغلي, أحمد2025-09-082025-09-082025http://dspace.univ-temouchent.edu.dz/handle/123456789/6778This study aims to highlight the importance of recycling used cooking oil as an economic and environmental solution that supports sustainable development, through a practical local case: the "ECOIL" project. The research addresses the problem of improper disposal of this liquid waste, which leads to pollution and environmental damage, while previous Arabic and international studies have shown its value as a raw material in chemical and energy industries. Using a descriptive and analytical method, the study explores the theoretical framework of sustainable development, recycling, and the green economy, while also reviewing existing literature and case studies. It further analyzes the technical, economic, and social feasibility of implementing a simple local system for collecting and reusing used oil. The findings suggest that "ECOIL" can create job opportunities, reduce environmental costs, and promote green entrepreneurship in Algeria, especially with the growing global demand for sustainable energy. The study recommends policy support, public awareness, and legal frameworks to encourage the adoption and expansion of such initiativesotherUsed cooking oil, Recycling, Sustainable development, ECOIL project, Green economy, Environmental solution, Waste management, Green entrepreneurshipThesis