Experimental Research to Determine the Energy Profile in Processing Cassava (Manihot species) into ‘Gari’ in a Local Oven

Experimental Research to Determine the Energy Profile in Processing Cassava (Manihot species) into ‘Gari’ in a Local Oven

The dry-frying process is the most critical operation in the processing of cassava (Manihot species)

into ‘gari”. The local technique of ‘Garification’ in batch operations was found to be most dependent on

prevailing processing temperature with regular agitation. The temperatures of customised fryer was

recorded every 3 min of the ‘garification’ process until the process is completed. The moisture content

of dewatered 5 kg mash at 40-50%, was reduced to an acceptable moisture content of 12.5% at

temperatures in the range of 27–165°C. The energy profile was found to follow a particular profile of

dehumidification for the first 7 min, evaporation cooking between 8 to 12 min, drying at about 15 to 22

min and frying for about 5 min before cooling in a 30-35 min batch cycle. A swelling index of 3.4 as a

mark of good product was achieved. The moisture content and the temperature were also influenced

by the particle size of the mash and the cake density. These series of operation occurred

consecutively and are all dependent on the prevailing temperature and duration of treatment. The

Energy profile can be used for small and medium scale design, fabrication and processing of cassava

to obtain suitable product. It can also form a precept to automation or as a complementary processing

technique in an emerging mechanized gari fryer.

Author (s) Details

Duduyemi Oladejo

Department of Chemical and Polymer Engineering, Lagos State University, Epe Campus Lagos, Nigeria.

Okunzuwa Mark

Department of Chemical and Polymer Engineering, Lagos State University, Epe Campus Lagos, Nigeria.

K.A. Adedeji

Department of Mechanical Engineering, Lagos State University, Epe Campus Lagos, Nigeria.

K.O. Oluoti

Department of Chemical and Polymer Engineering, Lagos State University, Epe Campus Lagos, Nigeria.

View Book :-https://bp.bookpi.org/index.php/bpi/catalog/book/240

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