Residence time distribution in a single-screw extruder processing soy-sweet potato mixtures

Authors
Iwe, MO Van Zuilichem, DJ Ngoddy, PO Ariahu, CC
Citation
Mo. Iwe et al., Residence time distribution in a single-screw extruder processing soy-sweet potato mixtures, LEBENSM-WIS, 34(7), 2001, pp. 478-483
Citations number
38
Categorie Soggetti
Food Science/Nutrition
Journal title
LEBENSMITTEL-WISSENSCHAFT UND-TECHNOLOGIE-FOOD SCIENCE AND TECHNOLOGY
ISSN journal
00236438 → ACNP
Volume
34
Issue
7
Year of publication
2001
Pages
478 - 483
Database
ISI
SICI code
0023-6438(2001)34:7<478:RTDIAS>2.0.ZU;2-F
Abstract
The influence of feed composition. screw rotation speed and die diameter on residence time distribution of soy-sweet potato samples containing 180 g/k g water and extruded in a single-screw extruder. was measured using congo r ed as a tracer. Mean residence and plug flow times respectively decreased w ith starch content. Increase in screw speed enhanced break through time, wh ile a decrease in screw speed enhanced mean residence time. Die diameter ha d an effect on plug flow tune only. The dispersion number, a reciprocal of the Peclet number, was used to describe the extent of axial mixing in the e xtruder. The value of dispersion number varied from 0.024 to 0.060.