Translate the following English sentence to French:
"If the word "untreated" were to be deleted, it would no longer be possible to use mixed household waste in co-incinerators, something which would also apply to waste which had undergone extensive pre-treatment."
Si l'on supprimait le terme non traités, il ne serait plus possible d'utiliser dans les installations d'incinération, ni les ordures ménagères en mélange, ni des déchets ayant subi des opérations de prétraitement importantes.