Food preservation through fermentation represents one of humanity's most sustainable biotechnological practices, offering environmentally friendly alternatives to energy-intensive preservation methods. This comprehensive review examines sustainable fermentation approaches that enhance food security while minimizing environmental impact. We analyze traditional and modern fermentation techniques, their role in reducing food waste, energy efficiency considerations, and contributions to circular economy principles. The integration of controlled fermentation processes with renewable energy systems and waste valorization strategies presents significant opportunities for developing climate-resilient food systems. Our analysis demonstrates that fermentation-based preservation can reduce energy consumption by 60-80% compared to conventional methods while extending shelf life and enhancing nutritional quality.