STUDIES ON PROCESSING OF SWEET POTATO (Ipomoea batatas L.)
Loading...
Date
2015-09
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
K.R.C. COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
An investigation was carried out to find the best pre treatment and drying
methods on the quality of sweet potato chips and production of ethanol from flour of
sweet potato in the Department of Postharvest Technology, KRC College of
Horticulture, Arabhavi during the year 2014-2015. Sweet potato slices treated with
0.5 per cent sodium metabisulphite (T3) had recorded better quality parameters like
higher recovery (33.86%), lower moisture content (6.86%), less water activity
(0.186), lesser OD values for browning (0.013) and higher organoleptic scores for
colour and appearance (4.33), texture (4.00), taste (4.16), mouth feel (4.00) and
overall acceptability (4.25) when compared to other pre treatments.
The Second experiment was carried out to see the effect of drying methods on
quality of sweet potato chips obtained from best pre treatment from the first
experiment. The sweet potato chips pre treated with sodium metabisulphite 0.5 per
cent were dried in different driers. Among the different driers, slices dried in air
convection tray drier had recorded higher recovery (23.04%), ascorbic acid (55.78
mg/100g), total ash (0.82%), starch content (59.24%) and lower values for moisture
content (8.85%), water activity (0.32), lesser OD value for browning index (0.062)
with higher organoleptic scores for all sensory parameters. Similar trend was recorded
during storage. But, degradation of ascorbic acid and beta carotene was observed after
three months of storage period.
The Third experiment was carriedout for production of ethanol from flour of
sweet potatoes chips by using different microbial inoculums. Among the different
treatments, sweet potato flour fermented with Saccharomyces cerevisiae var.
ellipsoideus (T1) had higher fermentation recovery (85.14%) and ethanol content
(13.53%) when compared to other treatments.
Description
TH543
Keywords
null