Recycling Polyethylene Terephthalate (PET) by using a Catalyst from calcium oxide

            This invention involves the recycling of polylactic acid by utilizing a catalyst derived from calcium oxide prepared from discarded eggshells of guinea fowl. It employs a depolymerization process via glycolysis reaction to recycle polylactic acid chemically. The catalyst is prepared by finely grinding the discarded eggshell, then subjecting it to combustion under ambient conditions, followed by allowing the burnt eggshell to cool. Subsequently, the cooled burnt eggshell is finely ground again before being utilized as a catalyst.