Present work explains green nanotechnology technique in solid waste management. Solid wastes are generated from domestic, industrial, agricultural, commercial, health care and individual activities etc. Because of rising population, urbanisation, construction activities, and improper medical waste management, there is an increase in biomedical waste, which contributes to widespread landscape littering. Due to its inability to biodegrade, waste disposal has consequently become a significant issue on a global scale. Research is being carried out to develop ways for environment friendly disposal of biomedical wastes. Also, to enhance the moulding properties for better casting quality by using nanoparticles prepared in laboratory by green nanotechnology technique. The main objective of the work is preparation and characteristic study of modified biomedical waste used in green sand moulding for casting industry. The sand silica in green sand moulding material is replaced by biomedical waste. Nanoparticles are synthesized by green nano technology technique used as an additive in bio medical waste which will be treated as modified bio medical waste. Present study evaluated the influence of nano particles on biomedical waste which helps in metal moulding applications.