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All Journal REKAYASA Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Agritechnology : Jurnal Teknologi Pertanian
Darma Darma
Papua University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Electrical & Electronics Engineering Engineering Immunology & microbiology Physics

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Pengaruh Geometri Gerigi dan Kecepatan Putar Terhadap Kinerja Mesin Parut Sagu Tipe Silinder Darma Darma; Reniana Reniana; Budi Santoso; Jhonson Waromi
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 10, No 3 (2021): September
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v10i3.413-424

Abstract

Sago rasping machine or sago rasper is the most commonly used in sago processing both for small and large scale. It function is to reduce the size or to disintegrate sago pith into smaller particle.  By doing so, the starch contained in the pith can be separated in the subsequent process.  The amount of starch resulted depend on the size of rasped pith.  The smaller the pith is rasped the higher the starch can be extracted.  The purpose of this research was to test the effect of teeth geometrical shape and cylinder rotation speed on performance of sago rasping machine. There are four type of teeth geometrical shape namely cylinder, pyramid, screw, and cube and three levels of cylinder rotation speed they are 1500 rpm, 2000 rpm and 2500 rpm were tested. Results showed that the rasping capacity was affected significantly by the two single factors as well as its interaction of teeth geometrical shape and cylinder rotation speed. Similarly, starch yield and starch losses in waste were significantly affected by teeth geometrical shape.  Meanwhile, starch yield and starch losses in waste were not affected significantly by cylinder rotation speed and the interaction of the two factors. The best performance was resulted at the treatment of teeth geometrical shape of screw with the speed of cylinder rotation 2500 rpm.  The  performances at the treatment were: (a) rasping capacity was 918 kg/h, (b) starch yield was 48%, (wb), (c) starch loss in waste was15.1%.Keywords:  cylinder type, rasping performance, sago rasping machine, teeth geometry 
Uji Kinerja Mesin Ekstraksi Tipe Stirrer Rotary Blade Bertenaga Motor Bakar Bensin Untuk Mengekstraksi Pati Singkong Darma Darma; Desi Natalia Edowai; Marinus Kogoya
Agritechnology Vol 3 No 2 (2020): Edisi Desember
Publisher : Fakultas Teknologi Pertanian, Universitas Papua, Manokwari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51310/agritechnology.v3i2.57

Abstract

Pengolahan pati singkong skala kecil di Indonesia, termasuk di Papua Barat memiliki peluang dan prospek pengembangan yang cerah untuk memenuhi permintaan pasar. Permintaan tapioka di Indonesia cenderung terus meningkat karena terjadi peningkatan jumlah industri pangan maupun non-pangan yang menggunakan pati singkong sebagai bahan baku. Pada saat ini permintaan terhadap pati singkong (tepung tapioka) secara nasional, termasuk di Manokwari Papua Barat belum bisa terpenuhi oleh industri pengolahan tapioka yang ada. Salah satu tahapan penting dalam proses pengolahan pati singkong adalah ekstraksi pati yang bertujuan untuk memisahkan pati sebanyak mungkin dari ampas. Proses ekstraksi pati dapat dilakukan secara manual, semi mekanis dan full mekanis. Penelitian ini bertujuan untuk menguji kinerja mesin ekstraksi pati tipe stirrer rotary blade bertenaga motor bakar bensin untuk ekstraksi pati singkong. Evaluasi kinerja dilakukan dengan mengukur parameter kapasitas ekstraksi, rendemen pati basah, rendemen pati kering dan kehilangan pati pada ampas. Dari hasil pengujian kinerja menunjukan bahwa mesin dapat berfungsi dengan baik untuk mengekstraksi pati singkong. Kinerja mesin adalah (1) kapasitas ekstraksi 220,3 kg umbi parut/jam, (2) rendemen pati basah 46,47%, (3) rendemen pati kering 28,88% dan (d) kehilangan pati pada ampas 2,6%.
Rancang Bangun dan Uji Kinerja Mesin Pemarut Singkong Tipe Silinder untuk Produksi Tepung Tapioka Darma Darma; Arif Faisol; Asti Sangaji Dahlia
Rekayasa Vol 13, No 3: December 2020
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v13i3.7071

Abstract

The development of agroindustry in rural areas has a strategic role because raw materials are commonly produced in the areas. One of the industrial sub-sectors that has bright prospects to develop in rural agroindustries in Indonesia is tapioca flour processing industry. The most important operatiion units in tapioca processing is rasping or grating, which is mechanical disintegration of the tuber cell’s wall in order to free the starch granules and it suspended into the water during the extraction process.  The objective of this study was to design and test the performance of cassava rasping machine powered by gasoline engine.  In the experiment, three levels of cylinder rotation speed i.e. 1500 rpm, 2500 rpm and 3500 and two feeding methods of cassava tuber i.e. perpendicular and pararrel/longitudinal to the cylinder were examined. Results showed that combination of cylinder rotation speed and feeding methods significantly affect the rasping performances. The highest performance was obtained at the condition of cylinder rotation speed of 2500 rpm with feeding method perpendicular to the cylinder.  The performance of the machine at the condition were (1) rasping capacity 488,91  kg h-1, (2) starch percentage 42,28%, (3) starch loss in waste 7,61% and (4) rasping effect  84,92%.
Co-Authors Asti Sangaji Dahlia Budi Santoso Edowai, Desi Natalia Jhonson Waromi Marinus Kogoya Reniana, Reniana Tengku Riza Zarzani N