Creation and Testing the Efficiency of the Rice Husk Shredder

Abstract

This research has three main objectives: firstly, to design and develop a rice straw chopper; secondly, to evaluate its performance; and thirdly, to assess its quality. The study employed a rice straw chopper along with a performance testing table and a quality evaluation form. The researchers engineered a rice straw chopper equipped with a chopping mechanism specifically designed to reduce the size of rice straw particles. Subsequently, the chopper's performance underwent rigorous testing, and its overall quality was evaluated by experts. Statistical methods, including mean and standard deviation, were utilized for comprehensive analysis.

          The research 1) has developed an agricultural machinery capable of efficiently threshing rice straw to a smaller size, enhancing convenience for farmers in various agricultural activities such as organic fertilizer production or animal husbandry. The rice straw threshing machine has dimensions of 70 cm width, 130 cm length, and 150 cm height. It consists of a machine structure, a material feeding system, a power transmission system using a 3-phase electric motor with a size of 3 horsepower, a control system for safety, and a set of cutting blades. The cutting blades are flat, with dimensions of 2 cm width, 10 cm length, and 4 mm thickness, arranged in sets of 3, each set containing 3 blades, attached to a circular shaft at 120 degree angles. The blades can rotate at speeds ranging from 1,380 to 1,400 revolutions per minute. The threshing screen has a mesh size of 2 mm and can operate for 8-12 hours per day. It can reduce the size of rice straw to between 1.5-2.0 mm. 2) Efficiency testing of the rice straw threshing machine involved threshing 8 kilograms of rice straw five times. The average weight of the rice straw after threshing was 7.57 kilograms, with an average loss weight of 0.43 kilograms. The average time taken for threshing was 27.82 minutes, and the average machine efficiency was 94.58%. and 3) Quality evaluation of the rice husk shredder by experts resulted in an overall excellent rating with an average score of 4.70 and a standard deviation of 0.45.