A food bar arrangement comprising a salad bar or an open food display from which a customer can pick and compose a meal from a number of different food products, the food bar arrangement comprising:
- at least one food product holding arrangement each with at least one product holding element for holding fresh food products, an openable covering arrangement adapted to, in a closed position, cover and protect the food products from access and exposure to pathogens, the or each covering arrangement comprising at least one covering element which is arranged to be transferable from a closed position, in which food products are covered, preventing access, to an open position in which access to the food products is admitted, and vice versa, covering element sensing means is provided for the, or each, covering element, which covering element sensing means are adapted to register at least an activation of, or a position of, or a movement of the covering element, when the covering element is in an open position or is starting to move towards an open position and/or vice versa;
- a disinfection arrangement comprising a plurality of UV-C sources arranged to, in an activated state, expose or irradiate the food products kept in the/each food product holding element, with UV-C light at a wavelength for inactivation of pathogens, at least one UV-C source holding element in each product holding element for holding a number of said plurality of UV-C sources, and a disinfection control system for controlling the disinfection arrangement, said disinfection control system is in communication with the covering element sensing means and a activating/deactivating arrangement for activating/deactivating the plurality of UV-C sources, separately, in groups or all, allowing control of at least the activation/deactivation of the UV-C sources of each food product holding element, at least some of the UV-C sources are arranged to expose food products covered by a covering element are deactivated by the activating/deactivating arrangement when the activating/deactivating arrangement is detected by the covering element sensing means of said covering element(s), when the covering element(s) is to be opened, intended to be opened, or is moved towards an open position,
- wherein the plurality of UV-sources are arranged to provide a fluence of 15 to 24 mJ/cm2 over a whole surface to be disinfected within a predetermined time period to provide at least a 2-log inactivation of pathogenic microorganisms,
- wherein the disinfection arrangement comprises, for one or more of the food product holding elements, UV-C light absorbing material arranged to prevent UV-C light from reaching predetermined or variable areas, and/or areas outside the food bar arrangement where free user/end user access is permitted,
- wherein the covering elements are made of a material and/or have a thickness capable of blocking UV-C light, at least to a predetermined level, and of withstanding UV-C light exposure, and
- wherein by the disinfection control system, UV-C fluence and/or fluence e rate, UV-C source activation/deactivation, updated required activation time of the UV-C sources of the, or each, food product holding element, is/are automatically controlled at least in dependence on the position or movement of the covering elements of the food product holding element, an established, estimated or calculated, current fluence, and air flow, a desired UV-C fluence or fluence rate is set depending on a pathogen, and the disinfection control system comprises or is in communication with a local or central computing arrangement executing a risk calculation algorithm, for calculating a current, up-to-date potential exposure risk based on information for the or each for one or more of the food product holding arrangement, and in the UV-C source fluence or fluence rate is controlled based on said information to monitor and control disinfection measures in real-time.