A STUDY OF THE QUALITY OF CARROT ROOT CLEANING WITH A SPIRAL CLEANER: SOIL SEPARATION AND MECHANICAL DAMAGE
ДОСЛІДЖЕННЯ ЯКОСТІ ОЧИЩЕННЯ КОРЕНЕПЛОДІВ МОРКВИ СПІРАЛЬНИМ ОЧИСНИКОМ: ВІДОКРЕМЛЕННЯ ҐРУНТУ ТА МЕХАНІЧНІ ПОШКОДЖЕННЯ
DOI : https://doi.org/10.35633/inmateh-79-98
Authors
Abstract
This study combined two complementary criteria for evaluating a spiral cleaner for carrot roots: the spatial distribution of separated soil and the occurrence of mechanical damage. A laboratory test rig with a V-shaped cleaning trough formed by cantilevered spiral springs and driven brushes equipped with elastic rods was used. Nantes carrot roots were tested at cleaner-shaft angular velocities of 27.2, 31.4, and 35.6 rad·s⁻¹ and in two entry orientations: tail-end-first and thicker-end-first. Separated soil was collected in three consecutive zones along the transport path. Mechanical damage was assessed immediately after cleaning and again after 24 h using samples of 100 roots. Zone I accounted for 38–48% of the separated soil, Zone II for 33–41%, and Zone III for 11–28%. Increasing the angular velocity shifted soil separation toward the inlet section. The proportion of undamaged roots decreased from 66% to 44% for the tail-end-first orientation and from 75% to 59% for the thicker-end-first orientation. The thicker-end-first orientation resulted in 9–15 percentage points more undamaged roots and reduced the combined proportion of cracks, broken tail ends, and impact bruises from 13–25% to 5–14%. Under the tested conditions, an angular velocity of 27.2 rad·s⁻¹ with the thicker-end-first orientation was identified as the preferred low-damage operating condition. The results provide a basis for further multifactor optimization incorporating residual adhering soil, throughput, and energy consumption as additional evaluation criteria.
Abstract in Ukrainian



