This chapter discusses how food waste is increasingly being recognized as a valuable resource that may be used to develop innovative approaches for major worldwide problems including social justice, economic growth, and environmental sustainability. Food waste, which was once seen to be a burden, may now be recycled into useful goods including compost, animal feed, bio-energy, and bioactive substances. Key technologies for food waste valorization are highlighted in the chapter, such as composting, which improves soil health, and anaerobic digestion, which develops biogas for sustainable energy. In order to reduce the dependency on traditional feed manufacturing, it also looks at the transformation of food waste into superior animal feed. Bioactive substances, including vitamins and antioxidants, may now be extracted from food waste through recent developments in biotechnology. These compounds can then be utilized in medications, nutraceuticals, and cosmetics. The chapter additionally covers innovative extraction methods including microwave-assisted extraction and supercritical fluid extraction that reduce environmental effect while boosting production. Even though these solutions have a lot of potential, problems such waste contamination, the need for improved waste segregation, and technology costs still exist. Furthermore, the chapter covers issues like resource scarcity and hunger while emphasizing how food waste valorization could promote sustainable business practices and a circular economy.