CHAPTER ONE
1.1              INTRODUCTION
The digester machine is used for the removal of mescals from the palm fruit. The processes used in the digestion vary according to fundamental technological developments, which affect the system of operation.
The digestion of palm fruit is as old as mankind. The various level of social development change the phase of the digestion action.
The relative humidity content of the palm fruit and other associated, physical sand chemical composition of the palm fruit affect the choice of processes for the digestion of palm fruit.
The digester system within the African countries is usually done in pastel and mortar. The palm fruit is fed in a hermitical cross-sectional mortar and pounded with many reciprocatory up and down blows. This action tends to remove the monocarp from the palm fruit in marshy oil dropping from. This mashy – oil – dropping form now give why for pressing operation which will lead to the bringing out the palm oil. The digester system within the African countries can also bed done in a horizontal sump of about 6ft x 3ft with 8 3ft depth where the palm fruit will be poured when that is done a person will stand on the palm fruit right in the hole and be matching on it for a short period after which the monocarp will be removed from the Nut when it is pressed the oil will come out.
In the fundamental technological development, engineering designs encouraged the construction of different – proto type of digester which aids in the production of more digestible mashy fruit. There are different types of digesters. They are classified into:
1.         Manual digester
2.         Motorized digester.