Thanks to Sherry Persaud and Bob Michael we have the answers.
KoH’s recyclables are taken to American Paper Mills in Tarrytown, which is owned by Kendal’s contract carter.
Paper and cardboard are sold on the open market; mixed plastics, glass and metal are transported to Recommunity in Beacon, where they are sorted and cleaned and sold to buyers who manufacture new products.
Trash is incinerated at WTE (Waste to Energy), EFW (Energy from Waste), or Resco (waste to energy facility in Peekskill).