Abstract: An apparatus for sanitizing articles includes a conveyor for conveying articles through the apparatus, and an irradiation chamber surrounding the conveyor. A plurality of UV lamps is arranged in the irradiation chamber to irradiate with UV light articles conveyed through the irradiation chamber on the conveyor. The intensity and dose of UV light may be varied to achieve a desired level of sanitization. A method of sanitizing articles for re-use includes checking articles for cleanliness, and washing only articles which are discovered to be below a predetermined standard of cleanliness. Articles which are discovered to be above a predetermined standard of cleanliness are irradiated with UV light in order to sanitize such articles without washing. Articles which are below the predetermine standard of cleanliness may be washed in a traditional wash system prior to being irradiated with UV light.

Abstract: A septic tank is formed from a plurality of tank modules each of which comprises a substantially closed container. Each tank module is bolted to a next adjacent tank module at a flat end wall thereof with the bolts being of large diameter and in some cases including a central longitudinally extending opening so that the bolts act to communicate fluid from one tank module to the next adjacent tank module. Each tank module is shaped with an upper wall part which is of parabolic arch shape and a base wall which is substantially flat. This defines the optimum shape for strength to accommodate the forces when the tank is buried. Tanks can thus be formed in modular parts so that various different size modules can be connected together by the above coupling technique to form a multitude of different sizes of tank.