Abstract: A process and apparatus for disinfection of spaces using a disinfecting liquid droplet spray atomization are described, in which an electric fan 107 is used to dispense the atomization from an atomization chamber 104 via venture outlets 106 into the space to be disinfected. The operation of the electric fan 107 is modulated in a cycle having a first phase in which the fan is operated at full speed and a second phase at which the fan is operated at a randomly selected speed to vary the rate of dispensing into the space in order to improve the dispersal of the atomized droplets in the space and hence the efficacy of disinfection.

Abstract: The invention is directed to disinfection of object(s) in a space using a UV emitter. A calibration process is performed in which one or more UV sensors are placed proximate the object or set of objects to be disinfected. The sensor(s) measure a UV dose and the time taken for the UV dose to equal to a level suitable for disinfection to occur to the required level is measured. This is saved in a database in association with an identification of the object(s) being disinfected. This saved program can be activated subsequently and without the sensors present to disinfect the object(s). In addition to the calibration process, or in the alternative, the controller may enable the operator to select a particular pathogenic organism or set of organisms as a target of the disinfection process, with the controller accessing the database to obtain a disinfection program specific to the target.