"Wissen - Kultur - Transformation"

V egetable washing with nozzles must be performed carefully in a short time with as little fresh water and energy as possible. The relation between the different factors of influence on the jet spray structure and the jet effect at the impact surface were analysed by a standard testing method developed in the context of a basic research, in order to show the possibilities of optimising the nozzles as well as the washing process. Materials and methods In the following article, results obtained from the investigation involving two out of six selected washing nozzles are described. Nozzles with different flow rates were examined for water saving potential and thoroughness as well as gentle cleaning under conditions that are normal in vegetable washing in practice. The jet parameters of both nozzles were determined under varying operating parameters, at spray pressure (p) of 3, 5 and 8 bar, and at fixed nozzle distances (d) of 10 and 20 cm. An energetic analysis of the droplets formed i...