Return propane cylinders to a propane gas supplier. A list of these companies can be found in the Yellow Pages under the heading "Gas - Propane".
Propane cylinders can also be placed on your tree lawn on your regular collection day away from your refuse.
Empty 5 pound propane tanks from a camp stove or torch are not refillable and should be recycled through a scrap metal yard.
Please visit the Cuyahoga Recycles website for further information.