This research demonstrates how coffee processing waste can be recycled into valuable mushroom production instead of becoming environmental pollution. The study found that treating coffee waste through composting makes it an excellent growing medium for edible oyster mushrooms, particularly for species like P. ostreatus and P. sapidus. This has important implications for both waste management and food production. Impacts on everyday life: • Provides a sustainable solution for coffee waste management in coffee-producing regions • Creates opportunity for local mushroom production and income generation • Offers an environmentally friendly way to produce nutritious food • Reduces pollution from coffee processing waste • Demonstrates practical application of circular economy principles in agriculture