WG2 develops and optimizes green, sustainable, and scalable extraction technologies—including microwave-, ultrasound-assisted extraction, and NADES-based systems—to efficiently process the fiber sources identified by WG1. By ensuring extraction methods are environmentally friendly and commercially feasible, WG2 provides industry-ready fibers for characterization (WG3), bioactivity evaluation (WG4), and product development (WG6), thus serving as a technological backbone for transforming food waste into high-value applications.