Stationary and movable apparatus and installations for water treatment, namely, water purification units; Stationary and movable apparatus and installations for water desalination, namely, desalination units; Stationary and movable apparatus and installations for water treatments and desalination by means of membranes, namely, water purification units, water desalination units; Stationary and movable apparatus and installations for water treatments and desalination by means of a reverse osmos...