In Netherlands, 30 million eggs are processed and theoretically 181 tons of eggshell waste will be generated per day. According to EU regulations, industrial eggshell is considered as hazardous waste and collected by national authorities or managed by egg companies. However, as the natural bio-based materials, eggshell is a valuable source when the mineral shell and the inner membrane separated. This inner membrane takes up weight of 0.1 wt% and gently envelops the embryo and protects embryos from harmful microorganisms. It’s a hidden treasure.