Bread crumbs extrudates: A new approach for reducing bread waste
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Tarih
2019
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Academic Press Ltd- Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Processing bread wastes constitutes a major problem for most bakeries. They are generally processed into bread crumbs and used in breading formulations. The aim of the study was to develop a new way of reducing bread wastes by processing bread crumbs in extrusion cooking. The effects of feed moisture and exit die temperature on physical and functional properties of bread crumbs extrudates (BCEs) were investigated in comparison to wheat flour extrudates (WFEs). Feed rate, screw speed and die hole diameter were kept constant (4.0 kg/h, 200 rpm and 2.0 mm, respectively). Exit die temperature was adjusted to 120, 135 or 150 degrees C, while feed moisture content was 13, 15 or 17%. Especially at low feed moisture content (13%), BCEs had higher expansion index values (7.57-8.07), than WFEs (5.88-6.01). The lowest bulk density values were 0.02 and 0.06 g cm(-3) for BCEs and WFEs, respectively. BCEs had significantly softer and more crispy textures than WFEs at all extrusion conditions studied. BCEs' dietary fibre contents (5.75-7.28%) were significantly higher than WFEs' (4.58-5.50%). Resistant starch contents also demonstrated a similar trend. These improved properties confirmed that, bread crumbs are promising raw material in extrusion cooking and expected to provide products with added-value from bread wastes.
Açıklama
Anahtar Kelimeler
Extrusion cooking, Bread crumbs, Total dietary fibre, Functional properties
Kaynak
Journal of Cereal Science
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
85
