Extrusion of apple pomace facilitates pectin extraction

Jae-Kwan Hwang, Chul Jin Kim, Chong Tai Kim

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Twin-screw extruder was employed to disintegrate apple pomace (AP) to facilitate production of apple pectins by water extraction. AP was extruded under different conditions of screw speed, 250-350 rpm; feed rate, 30-40 kg/h; moisture, 20-30%. The yield of water soluble polysaccharides (WSP) increased with increasing specific mechanical energy (SME), but intrinsic viscosity decreased with increasing SME. Considering both the WSP yield (g/dL) and intrinsic viscosity (dL/g), a dimensionless term, product yield x intrinsic viscosity (Y[η]), was an objective function for optimizing conditions for the solubilization of AP polysaccharides. Y[η] of pectins in extruded WSP ranged 0.59-1.34, while acid extracted WSP had Y[η] of 1.12. Extruded WSP with Y[η] comparable to acid extraction was obtained in the SME ranges of 110-170 kWh/h.

Original languageEnglish
Pages (from-to)841-844
Number of pages4
JournalJournal of Food Science
Volume63
Issue number5
DOIs
Publication statusPublished - 1998 Jan 1

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apple pomace
Malus
extrusion
pectins
Polysaccharides
polysaccharides
Water
Viscosity
Pectins
viscosity
water
screws
energy
Acids
extruders
acids
solubilization
pectin
apples

All Science Journal Classification (ASJC) codes

  • Food Science

Cite this

Hwang, Jae-Kwan ; Kim, Chul Jin ; Kim, Chong Tai. / Extrusion of apple pomace facilitates pectin extraction. In: Journal of Food Science. 1998 ; Vol. 63, No. 5. pp. 841-844.
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Extrusion of apple pomace facilitates pectin extraction. / Hwang, Jae-Kwan; Kim, Chul Jin; Kim, Chong Tai.

In: Journal of Food Science, Vol. 63, No. 5, 01.01.1998, p. 841-844.

Research output: Contribution to journalArticle

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