http://www.separett.com/produc...lets/freeze-toilets/

unusual design toilet that should be RV friendly....if your rv has electricity
this compact device freezes everything down there (so no sewer)
---take a bucket out and dump it frozen in the garbage...

..........and what happens when the garbage thaws? My Garbage company does not permit liquid disposal. Not to mention the nasty smell of thawed out yuck

guess that you would not be a dairy farmer