OLASUPO, MATHEW DAMILARE
(MEE/09/6863)
THE FEDERAL UNIVERSITYOFTECHNOLOGYAKURE
February,2013

 Wastes are substances or objects, which are disposed off or are intended to be
disposed off or are required to be disposed off by the provisions of national
law (United Nations).
 Composting is the biological degradation of organic substrates aerobically or
anaerobically under conditions of temperature and moisture suitable for acting
micro-organisms to thrive, with a final product stable for storage and application
to soil without adverse environmental impact.

AIM:
 The aim of the work is to improve on the development of a
household kitchen waste composting machine.
OBJECTIVES:
a. Improving on the existing design towards achieving a simple and
effective composting machine that would compost kitchen waste.
b. Conduct a performance evaluation of the composting machine.

METHODOLOGY
FAN SPEED CALCULATION
V = The speed of fan (V) is:
V = ∏DN÷60 d = diameter of fan N = speed of motor in the fan
BEARING CALCULATIONS
W = X. V. Wr +Y. Wa
X = Radial load factor Y = Axial load factor Wr = Radial load V =
Rotational factor
HEATING COIL (Nickel- Chromium)
Q = MC (ø2 –ø1 ) M = Mass of heating coil C = Specific heat
capacity of air = 1.0035J/Kg K ø2= Final Temperature of
heating coil = 70ºC (Ojumu and Opafunso, 2012) ø1=25ºC (Room)
MASHER ASSEMBLY
W = B/Cosø + T B=axial distance T= tolerance ø=helix angle
V = 1/3∏r2 x T
1. In order to improve on
the development of the
machine, the following
parts would be calculated
and designed:
 Fan Speed
 Bearing
 Heating Coil
 Masher
 Chute
2.Performance Evaluation
of the machine would also
be done.

It is expected that at the end of this project, a machine which will
produce manure for agricultural purposes from household kitchen waste
would have been completely developed and tested for high efficiency.