Design and Test of the Smart Composter Controlled by Sensors

A Simplified Model to Calculate the Power Absorbed for the Movement of Organic Waste in a Rotary Composter: Industrial Case Study

“…In figure 5, the calculated result of the application of the model proposed in "11" on two industrial applications of rotary composting ( [4], figure 6) and ( [5], figure 7), the power of movement of the organic matter in the two composters is 0.274 kw for an industrial application [4] and 0.135 kw for the industrial case [5] for a rotation speed of 4 rpm.…”

“…In order to validate the proposed model on industrial rotary composting [4] - [5] we have introduced in the two rotary composters of the same type of organic waste, the dimensions of the two industrial rotary composters (composters [4]: diameter 1 m, length 2 m), composters [5] (diameter 0.9 m, length 1.5 m), the density of the waste is (600 kg / m3) and the angle of repose 40 °, both composters operate at the same rotational speed 4 rpm.…”

“…For rotary composters, the degree of filling is generally (0<f<0.5) to facilitate the degradation of organic waste. In figure4, the degree of filling f is related to the level of the sinus 3 ε according to their geometric relationship described in equation (5). For the range of interest (0<f<0.5), the relationship can be well approximated regression model with a high R-squared value of 0.9995.…”

“…They are widely used in industries for the treatment of organic matter. A rotary composter consists mainly of a rotating cylinder usually driven by a motor figure 1 for more details see [4]- [5]. The organic material to be treated is fed continuously or discontinuously through a door located on the longitudinal side of the cylinder, which follows a 20-day treatment cycle to reduce the size of the organic material and produce compost, by rotating the cylinder and controlling all the composting parameters [6]- [7].Depending on the composting process and the quantity to be treated, the size of a rotary composter can reach up to (diameter 3.9 m, length 39 m) with a treatment of up to 100 t/d of organic waste [8].…”

“…This requires knowledge of the dimensions of the rotary composter, the operating parameters of the composter and the property of the material to be treated. In the following sections, the equations available in the literature will be briefly described, from which a simplified model is then derived and tested by measurements on two industrial applications of rotary composting [4]- [5].…”