Effect of Some Operating Parameters on Wheat Size Reduction Process During the First Break Rollers

Yıl 2017, Cilt: 27 Sayı: 1, 77 - 81, 31.03.2017

Fatih Kalkan

https://doi.org/10.29133/yyutbd.277848

Öz

In this study, the effects
of roll speed and roll gap on wheat
size reduction process were studied; the physical properties of wheat kernels
were also determined for the initial moisture content. Selected roll
speed levels were 500 and 525 rpm, while roll gap levels at the nip point were 0.6, 0.7, and 0.8 mm. Size reduction experiments were carried out
for Soft White Winter (SWW) wheat. The
geometric mean diameter, thickness dimension, thousand kernel mass, bulk
density, and NIR hardness index of wheat kernels at the 13.07% d.b. of moisture
content were 3.88 mm, 2.81 mm, 43.03 g, 816.20 kg m^-3, and 40, respectively. Protein content of
wheat kernels was also determined as 9.0% d.b. On the other hand particle
size distribution was not generally affected by roll speed statistically, while
it was statistically affected by roll gap (p<0.01). 

Anahtar Kelimeler

First break rolls, Physical properties, Size reduction process, Wheat

İlk Kırma Valsleri Sürecinde Bazı İşletme Parametrelerinin Buğday Boyut Küçültme İşlemi Üzerindeki Etkileri

Öz

Bu çalışmada, vals hızının ve
vals aralığının buğday boyut küçültme işlemi üzerindeki etkileri çalışılmış; ayrıca buğdayın
mevcut nem içeriği için bazı fiziksel özellikleri belirlenmiştir. Deneyler için,
vals hızları sırasıyla 500 ve 525 dev dak^-1 ve vals aralıkları 0.6, 0.7 ve 0.8 mm olarak seçilmiştir. Çalışmada
materyal olarak Yumuşak Beyaz Kışlık buğday kullanılmıştır. Mevcut nem
içeriğinde, buğday çeşidinin geometrik ortalama çap, kalınlık boyutu, bin tane ağırlığı,
hacim ağırlığı ve NIR sertlik indeksi değerleri sırasıyla 3.88 mm, 2.81 mm, 43.03 g, 816.20 kg m^-3, and 40 olarak saptanmıştır. Söz konusu bu
buğday çeşidinin protein içeriği %9.0 k.b. olarak belirlenmiştir. Öte yandan
partikül boyut dağılımı, genelde, vals hızından istatistiksel olarak
etkilenmezken, vals aralığından istatisksel olarak etkilenmiştir. 

Anahtar Kelimeler

Buğday boyut küçültme işlemi, Buğday

Kaynakça

• Campbell GM. Roller Milling of Wheat, ElsevierScience, http://www.engineeringvillage.com, Database: Referex Collection: Chemical, Petrochemical&Process, 2007.
• Deshpande S.D. Bal S. Ojha T.P. Physical properties of soybean. Journal of Agricultural Engineering Research, 1993;56, 89-98.
• Fang C, Campbell GM. On predicting roller milling performance IV: Effect of roll disposition on the particle size distribution from first break milling of wheat. Journal of Cereal Science, 2003;37:21-29.
• FAO. http://www.fao.org/ 2013.
• Hsieh FH. Martin DG. Black HC. Tipples KH. Some factors affecting the first break grinding of canadian wheat. Cereal Chemistry, 1980;57(3), 217-223.
• Kalkan and Kara 2011. Handling, frictional and technological properties of wheat as affected by moisture content and cultivar. Powder Technology, 213, 116-122.
• Kalkan F. Singh A. Vanga SKK. Raghavan V. Kara M. Effects of tempering moisture and roll differential on wheat size reduction process during the first break rollers. Transaction of the ASABE, 2014;57 (5), 1425-1429.
• Matz S.A. The Chemistry and Technology of Cereals as Food and Feed. 2th Edition, Van Nostrand Reinhold, New York, 1991.
• Mohsenin NN. Physical Properties of Plant and Animal Materials. Gordon and Breach Science Publisher, New York, 1986.
• Posner ES. Hibbs AN. Wheat Flour Milling. 2th Edition, American Association of Cereal Chemists, Inc., St. Paul, 2011.
• Scanlon MG. Dexter JE. Effect of smooth roll grinding conditions on reduction of hard red spring wheat farina. Cereal Chemistry, 1986;63(5), 431-435.
• Suthar SH. Das SK. Some physical properties of karingda (Citrulluslanatus (Thumb) Mansf) seeds. Journal of Agriculture Engineering Research, 1996;65, 15-22.