Development And Performance Evaluation Of An Integrated Irvingia Spp. (Bush Mango) Nut Extraction And Drying Machine

ABSTRACT

 This study focussed on development and evaluation of an integrated bush mango nut extraction and drying machine. The machine comprises of two processing operations: seed (nut) extracting and drying units. The extracting unit consists of the de-fleshing/depulping chamber and the separating chamber. Powered by a single prime mover, the integration was achieved through open, crossed belts and pulley arrangement for synchronized operations. The design capacity of the bush mango hopper was for 60 bush mango fruits. Performance evaluation of the nut extraction efficiency, 𝜂𝑒𝑥(%) was carried out at varied fruit moisture contents (fresh and microwaved fruits) and defleshing speed ranging from 51.8% to 91.8% and 27rpm to 67rpm respectively. The result indicated maximum extraction efficiency, of 91.67% at a de-fleshing speed of 27rpm and moisture content of 91.8 % with an average output of 107.84Kg/hr. It was also found that the de-fleshing time varied slightly with fruit mass. The dryer demonstrated a capacity of 2.57Kg of moisture removal in 2 hrs 20 mins, evident from the test conducted. Cost benefit analysis carried out showed that the machine has a benefit-cost ratio of 1.28 which is acceptable for investment. Hence, the machine significantly reduces production time and eliminates drudgery in the production of bush mango dry nuts.