Zagazig University Digital Repository
Home
Thesis & Publications
All Contents
Publications
Thesis
Graduation Projects
Research Area
Research Area Reports
Search by Research Area
Universities Thesis
ACADEMIC Links
ACADEMIC RESEARCH
Zagazig University Authors
Africa Research Statistics
Google Scholar
Research Gate
Researcher ID
CrossRef
Improving the Drying of Onion Using the Instant Controlled Pressure Drop Technology
Faculty
Agriculture
Year:
2011
Type of Publication:
Article
Pages:
993-1001
Authors:
Mounir, Sabah, Allaf, Karim, Albitar, Nsren, Besombes, Colette
DOI:
10.1080/07373937.2010.507912
Journal:
DRYING TECHNOLOGY TAYLOR \& FRANCIS INC
Volume:
29
Research Area:
Engineering
ISSN
ISI:000294803500001
Keywords :
Decontamination, Drying, Effective diffusivity, Initial starting accessibility, Modeling, Sensorial evaluation
Abstract:
In the present article, a new manner to use the instant controlled pressure drop (DIC) was adopted in the drying of onion. Instead of using it as a texturing treatment inserted in the second stage of hot air swell-drying operation and performed when water content is less than 30 g H(2)O/100 g dry matter, here the DIC was performed as a blanching-steaming pretreatment of fresh cut onion, with a steam pressure of 0.2-0.5 MPa, for 5-15 s, and an instant pressure drop (with a rate >5 MPa s(-1)) toward a vacuum of 5 kPa. Afterward, drying was carried out with 40 degrees C, 1 ms(-1), and 267 Pa partially pressure humidity hot air. Although this DIC treatment aimed to avoid notable expansion, it could intensify mass transfer, reducing the total drying time, which reached 700 min instead of 3200 min for untreated samples; the effective diffusivity and the initial starting accessibility dramatically increased. Consequently, sensorial and nutritional attributes could be preserved with a perfect decontaminated end product.
Online
PDF
جامعة المنصورة
جامعة الاسكندرية
جامعة القاهرة
جامعة سوهاج
جامعة الفيوم
جامعة بنها
جامعة دمياط
جامعة بورسعيد
جامعة حلوان
جامعة السويس
شراقوة
جامعة المنيا
جامعة دمنهور
جامعة المنوفية
جامعة أسوان
جامعة جنوب الوادى
جامعة قناة السويس
جامعة عين شمس
جامعة أسيوط
جامعة كفر الشيخ
جامعة السادات
جامعة طنطا
جامعة بنى سويف