recycling spent hydrophobic polymeric media can beneficially utilize waste oil to dissolve the media . the method employs simple equipment and materials , many or all of which are already on location in various industrial operations such as fracking operations or food production factories . the method does not call for landfilling spent media , thus reducing the environmental impact and reducing expense . transport costs for spent media and disposal fees can likely decrease . the resulting product can be sold to refineries for further processing and repurposing , thus generating additional revenue .