PENGARUH PERBEDAAN KECEPATAN PUTAR (RPM) DISC MILL TERHADAP KESERAGAMAN UKURAN BUTIRAN GULA SEMUT
ABSTRACT: The aims of this
research were to find out the effect of different rotational speed of disc mill
to the size spreading and uniformity index of brown sugar and to know the
optimal rotational speed of disc mill producing size of 0,8 to 1,2 mm. The parameters observed were water content,
fineness modulus (FM), uniformity index, grain yield, bulk density, and
color. The research was conducted at
five variations of rotational speed which were 800, 900, 1000, 1100, and 1200
rpm with 1500 g sample for each variations.The results show that the water
content of brown sugar is between 1,30 and 1,76%, the fineness modulus is
around 1,99 to 4,74, the particle size is around 0,41 to 2,79 mm, the highest
grain yield reaches 45,32% at actual speed of 900 rpm, and the range of bulk
density is about 721,07 to 740,40
kg/m3. The color of
the middle fraction
compared with commercial
sugar is not significantly different. The color indexes of middle fraction in each
treatment are IRED 0,41 to 0,43, IGREEN around 0,35, and IBLUE 0,22 to
0,24. Based on the analysis of variance
and Duncan’s method (α < 0,05) show that the rotational speed (rpm)
significantly affects to the particle size, fineness modulus, and grain yield,
but not to the water content, bulk density and color.
Penulis: Novi Kharisma, Sri
Waluyo, Tamrin
Kode Jurnal: jppertaniandd150013