Purification apparatus and installations and structural and replacement parts therefor for cleaning, oxidizing, and disinfecting water, wastewater, aqueous solutions, or suspensions, especially with chlorine dioxide; Water purification units for cleaning, oxidizing, and disinfecting water, wastewater, aqueous solutions, or suspensions, especially with chlorine dioxide; Separators for the cleaning and purification of liquids for cleaning, oxidizing, and disinfecting water, wastewater, aqueous ...