Effect of Cylinder Rotation Speed, Teeth Density and
Engine Power Rate on Performance of Cylinder Type
Sago Rasping Machine
Darma*,1 Aceng Kurniawan2 and Prawatya Istalaksana2
1Department of Agricultural and Biosystem Engineering, Papua University, Indonesia.
2Department of Agricultural Product Technology, Papua University, Indonesia
Although Papua and West Papua Province have the largest potential of sago palm
(Metroxylon sagu) in the world, up to the present time sago starch production and
utilization has been very low compared with its potential. This is because of farmers in
this area still use traditional method to process sago starch which are inefficient and
ineffective. In order to increase sago starch production, farmers should change the
traditional method with mechanical one. The objective of this study was to investigate the effect of cylinder rotation speed, teeth density and engine power rate on performance of cylinder type sago rasping machine. In the experiment, three levels of cylinder rotation speed i.e. 2000, 2250 and 3000 rpm, three variation of teeth density namely 2.2 cm × 4 cm, 2.2 cm × 3 cm, and 2.2 cm × 2 cm and two levels of power rate i.e. 5.5 hp and 6.5 hp were examined. The rasping performance test was carried out by measuring rasping capacity, starch percentage, and starch yield. Results showed that the best condition to achieve highest rasping performance was cylinder rotation speed of 2250 rpm at teeth density 2.2 cm × 4 cm with power rate of 6.5 hp.
Keywords: Cylinder rotation speed, engine power rate, sago rasping machine, teeth density.
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