The waste is mixed with either paper or cardboard, shredded and then aerated to produce bacteria which the worms like eating.
(The waste; is; mixed with either paper or cardboard) (The waste; mixed; with either paper or cardboard) (either paper or cardboard; shredded; )
The waste The waste either paper or cardboard
is mixed shredded
mixed with either paper or cardboard
with either paper or cardboard