Design of Compost Machine

Project Overview

Organic waste and especially Food waste is a worldwide problem, it cost to be disposed and nothing is gained from it, on the contrary, it causes the emission of harmful gases such as methane. In Saudi Arabia 35 percent of the garbage is a food waste. One of the major problems that faces Saudi Arabia nowadays that there are no serious moves towards solving the food waste issue. In 2030 vision, one of their targets is to focus on the pollution and the causes of it. Composting has proven to be a valid solution to this problem but not entirely explored. The objectives of this project are to design a composting machine with certain parameters for the design, Process time, Easy to use, odorless and power saving. The designed food waste decomposition system is designed for rapid composting performance. It can be used by households, restaurants, hotels, schools, apartment buildings, communities, offices and cafeterias depending on the capacity of the machine. The system employs high temperature, microorganisms to decompose food waste and organic matter. The machine was built with an agitation motor with rated power input of 36W and an exhaust fan with 9.5W rated power input and a heater with 200W rater power input in addition to temperature sensor and humidity sensor and printed circuit board to control the process. The prototype was able to decompose organic waste in a time frame of 38 to 50 hours with minimum harmful gases emissions and odors, and it's almost a plug - play machine but with an average power consumption rate of 484 watt.

Project Objectives

The project objectives are:
  • Study the different factors within the composting process 
  • Learn how to make the machine as energy efficient as possible.
  • Increase public awareness on food waste and how to handle it.
  • Learn about sensors and control system.
  • Study the effects of bacteria on the composting process.


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