In order to apply treatments in continuous flow, a new facility, here
named UV-4 system, was built (Fig. 1). The entire setup consisted of a
metallic structure that formed a vertical tunnel 143 cm long and
50 cm wide. were placed in the tunnel corners, as follow: in two opposite corners
were located two lamps in each, one in the top and the second one in
the bottom. And, in the other two opposite corners one lamp was located
in each, atmid height.