In Franklin County, when recyclables are collected from your curb or a drop-off box, they are taken to a Materials Recovery Facility (MRF). At the MRF, people and mechanical power are used to sort out the recyclables into different categories. A series of blowers/ fans, lasers, magnetics, and other technologies are used to sort each material into bales. Glass isn't baled, instead it is typically crushed and collected in a large dumpster which is sold to companies who melt down the glass and create new bottles and other products.
Check out this short video or virtual tour for a deeper dive:
Virtual MRF Tour