A mobile washing and disinfecting system includes a wash chamber with an openable door, a mobile base coupled to the wash chamber, the mobile base having a recess containing all electromechanical components, a re-configurable spray arm assembly having a pivotable spray arm with a plurality of nozzles connected to a water turbine configured to pivot the spray arm in an oscillating motion for directing a spray of washing and disinfecting fluids radially away from the spray arm within a predefined arc, and a modular programmable microprocessor control supported on the removable wash housing for controlling the cleaning cycles.