comparison in the degree of disinfection with chlorine
solutions at different concentration is shown for three vegetables.
First, in Fig. 1a disinfection is shown for carrots. The main challenge
in this vegetable is the porous surface that allows bacteria to
migrate to the inner tissue and thus be protected from the sanitizer
agent. In this figure, disinfection varies in accordance with the
concentration of chlorine and exposure time, reaching a final
inactivation of 3.5 log after 15 min Klaiber, Baur, Wolf, Hammes,
and Carle (2005) found a reduction of mesophiles in carrots of
about 1.7 log when chlorinated cold water (200 ppm, 4 C) was
used, and inactivationwas enhanced (2.3 log) when the chlorinated
water was warmed up (50 C) during 120 s. Meanwhile, Ruiz-Cruz,
Acedo-Felix, Díaz-Cinco, Islas-Osuna, and González-Aguilar (2007)
found about 2.5 log reduction of E. coli O157:H7 in carrots when
200 ppmwas used in tap water during 2 min; recirculation of water
did not have a positive effect on the inactivation.