BASIC REQUIREMENTS FOR THE DESIGN AND CONSTRUCTION OF A LOCAL COMPOST SCREENING UNIT

Mostafa, Mariam M.; Abdel Mottaleb, A. F.; Derbala, A.A.; Fouda, T.Z.

doi:10.21608/mjae.2010.105412

BASIC REQUIREMENTS FOR THE DESIGN AND CONSTRUCTION OF A LOCAL COMPOST SCREENING UNIT

Document Type : Original Article

Authors

¹ Grad. St., Agric. Eng. Dept., Fac. Of Agric., Tanta Univ., Egypt.

² Senior Res., Agri. Eng. Res. Inst. (A.R.C.), Egypt.

³ Assoc. Prof. Of Agric. Eng., Fac. Of Agric., Tanta Univ., Egypt.

⁴ Prof. and Head Of Agric. Eng. Dept., Fac. Of Agric., Tanta Univ., Egypt.

10.21608/mjae.2010.105412

Abstract

Theoretical analysis was carried out to design and construct a local compost screening unit to achieve maximum cleaning efficiency.
Theoretical analysis was conducted to estimate optimum sieve speed, optimum screen opening size, optimum sieve inclination angle.       Maximum required power was estimated in order to provide the machine with the suitable source of power. The machine shaft was designed so as to save it from over loads and the high stresses.
Theoretical analysis reveal that the local compost screening unit is preferred to be constructed under the following conditions:
- The sieve revolutions number should be lower than 43 rpm.
- The screen opening size should be of about 13 mm.
- The slope angle of the cylindrical sieve on the horizontal plane
      (sieve inclination angle) should be lower than 27 degrees.
- The motor power required for screening compost must be
      not less than 3.68 kW ( 5.0 hp ).
- The machine shaft must be designed at a 70 mm diameter.

Main Subjects

Agricultural Constructions Engineering

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