[ Apparatus for water supply and sanitary purposes, namely, sanitizing apparatus for water, waste materials, and waste gases using ultraviolet light; ] Apparatus and installations for the treatment, processing, purifying, disinfection and recycling of water, drinking water, waste water, waste materials or waste gases, in particular with the aid of UV radiation, namely, photochemical sterilization units, sustainable onsite water recycling and wastewater treatment systems, particle activators f...