Teknologi dan Industri Pertanian Indonesia
Vol 4, No 2 (2012): Vol.(4) No.2, June 2012

VISCOSITY AND PARTICLE SIZE DISTRIBUTION OF CONCENTRATED APPLE JUICE PRODUCED BY SPINNING DISC REACTOR (SDR)

Novi Safriani (Program Studi Teknologi Hasil Pertanian, Fakultas Pertanian, Universitas Syiah Kuala)

Article Info

Publish Date
01 Jun 2012

Abstract

This research  explored the potential use of the spinning disc reactor (SDR), a novel processing technique used for the production of concentrated apple juice. The apple juice was passed over the SDR disc spinning at 2000 rpm, heated at various temperatures (90 °C, 100 °C, 110 °C, and 120 °C), and at a flow rate of 7 ml/s. The effect of SDR-processing on viscosity and particle size of the apple juice concentration,  was investigated. The SDR-concentrated apple juice exhibits narrow particle size distribution (average particle size in the range of d32 = 0.1-0.2 µm and d43 = 4-12 µm) and shear-thinning behaviour in the range of shear rates from 0.1 – 200 s-1, in which the viscosity decreases with increasing the shear rate. The reconstituted samples show  similar viscosity with its original counterpart.  The increase of the processing temperature allows a reduction in the processing time. The results reveal that the SDR is capable of producing the concentrated apple juice. 

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Journal Info
Teknologi dan Industri Pertanian Indonesia
Website

Abbrev

TIPI

Publisher

Universitas Syiah Kuala

Subject

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

Description

Jurnal Teknologi dan Industri Pertanian Indonesia is dedicated to publish highest quality of research paper and review on all aspects of technology processing of agricultural products. Special emphasis is given to research that discusses postharvest technology, food chemistry and technology that is ...