Installation for treating wastewater from a toilet and sanitary unit comprising such an installation

A sanitary unit comprising:

• a WC comprising a bowl and a flush system, said flush system comprising a main tank, said main tank being connected to a water inlet and to said bowl, and
• an installation for treating wastewater from said WC, said installation comprising:
• a solid/liquid separation filter intended for being mounted at the outlet of a toilet bowl of a WC, and
• a liquid recirculation circuit arranged for conveying a liquid from said solid/liquid separation filter to a main tank of said WC,
• the solid/liquid separation filter including at least:
• an inlet intended for being connected to the outlet of the bowl of said WC,
• a solid/liquid separation module configured for separating solid matter from liquid matter,
• a first outlet intended for being connected to the inlet of a discharge pipe,
• a second outlet connected to said liquid recirculation circuit,
• said solid/liquid separation filter being configured for conveying solid matter from said solid/liquid separation module to said first outlet and for conveying liquid matter from said solid/liquid separation module to said second outlet,
• the liquid recirculation circuit comprising a filtration unit configured for making said liquid reusable for the flush system upon said liquid flowing through said filtration unit, the filtration unit of the liquid recirculation circuit including a prefiltration system and an ultrafiltration system connected in series, and said installation also including a backwash system for the prefiltration system having a supply inlet intended for being connected to a water inlet and a discharge outlet intended for being connected to the discharge pipe, the backwash system being configured for circulation water in counter-flow through the prefiltration system, said liquid recirculation circuit being connected to the main tank of the WC.