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Optimization of the Spray Drying Process of the Esterified Plantain Starch by Response Surface Methodology
Author(s) -
ChávezSalazar Andres,
CastellanosGaleano Francisco J.,
ÁlvarezBarreto Cristina I.,
BelloPérez Luis A.,
CortésRodríguez Misael,
HoyosLeyva Javier D.
Publication year - 2019
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.201800330
Subject(s) - swelling , solubility , absorption of water , central composite design , starch , water content , response surface methodology , potato starch , moisture , materials science , chemistry , spray drying , composite number , succinic anhydride , chemical engineering , chromatography , composite material , food science , organic chemistry , geotechnical engineering , engineering
The response surface methodology, with a rotatable central composite design, is used in this study for optimizing spray drying process conditions to obtain a fine modified starch powder from “Dominico Hartón” plantains, which are chemically modified with 2‐octenyl‐succinic anhydride. A pilot‐scale spray dryer is used, and the following process factors are evaluated: (A) air inlet temperature (136–154 °C), (B) air outlet temperature (69–81 °C), and (C) rotational atomizer speed (17666–34333 rpm). The response variables are yield, moisture content, and functional properties such as water absorption index (WAI); water solubility index (WSI), swelling power (SP) and degree of substitution (DS). The factors B and C significantly influence the functional properties. The following are the optimal conditions from the process: factor (A), 150 °C; factor (B), 80 °C; and factor (C), 34 858 rpm, with the desirability of 56.7%. Under these optimal conditions, chemically modified plantain starch with desirable quality properties of low moisture content, water activity, and solubility index and high process yield, water absorption index, swelling power, and degree of substitution could be produced.