Design and Performance Test of Jobs Tears (Coix Lacryma Jobi L.) Thresher Machine Solid Cylinder Roll Type

Jobs tears (Coix Lacryma-jobi L.) was a cereal crop that used as high nutrient food and animal feed ingredients. The purpose of this research was to design and test the performance of jobs tears seeds thresher machine of solid cylinder roll type. The machine parts consisted of machines frame, threshing cylinder, jobs tears seeds container, gear transmission, gearbox, and electric motors. Design process of its consisted of structural design and functional design to managed all parts of threshers. This machine was driven by an electric motor. The power and rotational speed of electric motor was 1 HP (1.400) rpm that was transmitted to the gearbox by V-belt and pulley. Speed of electric motor rotation was modified from1,440 rpm to 30 rpm, 38 rpm and 50 rpm by a gearbox with 1:30 ratio. gearbox rotation was transmitted to threshing tool (solid cylinder roll). Rotation of this two solid cylinders roll had a clearance of 6,5 mm that suppressed jobs tears seeds, so the seeds could be separated from the stems. This research resulted the jobs tears seeds thresher machine of solid cylinder roll type. The optimum rotation speed of cylinder was 50 rpm, with loss percentage 79.68% and percentage of good threshed jobs tears seeds 88.57%. This machine had a work capacity of 50,45 kg jobs tears seeds per hour

Chemical Changes and Shelf Life Fruit Salak Pondoh (Salacca Edulis Reinw) Dynamic Storage in the Air - Co2

Salak (Salacca edulis REINW) is an the original fruit from Indonesia. One of the most popular salak varieties is pondoh. The agribusiness opportunity of salak pondoh is quite profitable, and therefore it is needed special handling to withstand and prolong shelf life. This study was conducted at the Laboratory of Bioprocess Engineering and Post Harvest Agricultural Engineering Department Agriculture Faculty, University of Lampung, October until December 2011. Treatment was carried out on 4 jars with CO2 gas discharge and air,and two temperature treatments, room temperature and cold temperature (10-12oC). The observed data rate of respiration, measurement of total dissolved solids and the calculation of the level of acidity. The results showed that (1) the measurement of respiration rates was fluctuate at the cooler temperatures storage than at room temperature, (2) The total dissolved solids of the two temperatures treatments were not different, (3) the level of acidity in the cold storage higher than at room temperature (4) storage temperature and composition was of the air - CO2 greatly influenced the shelf life and chemical changes

Performance of Machines Thresher Seeds Job\u27s Tears (Coix Lacryma-jobi L.) Rubber Roll Type

Job\u27s tears (Coix lacrhryma jobi L.) was a plant that came from South Asia and East Asia. The distribution of this plant was expanded to Southeast Asia, especially Indonesia. In Indonesia, Job\u27s tears was found in Sumatra, Java and Kalimantan. Its seeds had many benefits as herbs or plant consumption. Threshing process of this plant was still using a traditional way. This research was purposed to design and test the performance of jali thresher machine type rubber roll. This research was conducted in February 2013 to March 2013 in the Laboratory of Agricultural Engineering, Department of Agricultural Engineering, Faculty of Agriculture, University of Lampung. This research procedure included several stages: design, assembly, testing results, and data analysis stage. Observations were made for machine capacity per hour, percentage of threshed seeds, and percentage of good or damaged threshed seeds. This research used 3 cylinder rotational speeds: 50 RPM, 38 RPM and 30 RPM. Results of this research indicated that this machine threshed seeds by 47 kg/ hour