PENGARUH PERBEDAAN KECEPATAN PUTAR (RPM) DISC MILL
TERHADAP KESERAGAMAN UKURAN BUTIRAN GULA SEMUT
TERHADAP KESERAGAMAN UKURAN BUTIRAN GULA SEMUT
THE EFFECT OF DIFFERENT ROTATIONAL SPEED (RPM) DISC MILL
TOWARD THE UNIFORMITY INDEX OF BROWN SUGAR
Novi Kharisma1, Sri Waluyo2, Tamrin3
1Mahasiswa JurusanTeknik Pertanian, FakultasPertanian,Universitas Lampung
2,3Staf Pengajar JurusanTeknik Pertanian, FakultasPertanian,Universitas Lampung
komunikasi penulis, email :sriwaluyo@gmail.com
Naskah ini diterima pada 22 September 2014; revisi pada 21 Oktober 2014;
disetujui untuk dipublikasikan pada 31 Oktober 2014
ABSTRACT
The aims of this researchwere to find out the effect of different rotational speed of discmill to the size spreading and uniformity index of brown sugar and to knowthe optimal rotational speed of disc mill producing size of 0,8 to 1,2mm. 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 2,79mm, the highest grainyield reaches 45,32%atactual 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.
Keywords :Brown sugar, discmill, rotational speed (rpm)
Lihat Jurnal Klik disini
Sumber : http://jurnal.fp.unila.ac.id/
