Technical analysis and performance test of chopper machines for composting rice straw

Nutrients diminishing become one of the low productivity of rice. Treatment of straw burned and the ashes as fertilizer remove nutrients contained therein. Composted rice straw so that the soil nutrient enhanced by the provision of rice straw compost continuously. Rice straw compost necessary optimal cutting rice straw with a length of 5 cm to 10 cm to accelerate the composting process. Paddy straw chopper is able to produce the chopped length, but the lack of data and the technical feasibility test engine performance so that the necessary research. The experiment was conducted in March-May 2016 in Bumiwangi Village, Ciparay, Bandung West Java and Agriculture Equipment dan Machine Laboratory Faculty of Agriculture Industrial Technology University of Padjadjaran. The method used descriptive analysis, namely making measurements, observations, calculations, and analyses so that the data obtained eligibility machine. Results of analysis techniques, namely the need for locomotion 1.83 HP, unit transmission with 4 belts, shaft diameter 23 mm, the diameter of the pin cylinder enumerator 7.58 and pin diameter motor of 7.40 mm, the size of the spi (9 × 9 × 27) mm, bearing life 6,740.64 h, the deflection order of 1.3 × 10 −3 mm and the weld strength 44,660 N and 57,417.07 N meets the technical feasibility than the number of belts. The results of the performance test, the density 128.78 kg/m 3 , the theoretical capacity 336.20 kg/h, the actual capacity of 304.680 kg/h, the enumeration efficiency of 90.62%, the fuel consumption of 3.19 liters/h, the theoretical power consumption 41.91 HP, enumeration yield 88.302%, the percentage of chopped chunks of 46%, the noise 97.5 dB and vibration of 21.6 mm/s as a whole meets the performance specifications except the cut length, noise and vibration