Evaluation of some handling and processing parameters for briquetting of guinea corn (Sorghum bi-color) residue

  • SJ Bolufawi
  • AI Bamboye


Biomass materials require reduction and densification for the purpose of handling and space requirements. Guinea corn (Sorghum bi-color) is a major source of biomass material in the tropic regions. The densification process involves some measurable parameters, namely: pressure, particles size and binder ratio. Guinea corn residue was collected from the Teaching and Research Farm of the Federal Polytechnic at Bida in Nigeria. The moisture content was 9.08% dry basis (db). It was reduced and sieved into three particle sizes D1 (4.70 mm), D2 (1.70 mm) and D3 (0.60 mm). Starch paste of 40, 45, 50 and 55% was added as binder. Briquettes were produced using a hydraulic press and a cylindrical die (56 mmf) at the processing pressures of 7.5, 8.5, 9.5 and 10.5 Megapascal (MPa). The bulk density of the unprocessed material was 46.03 kg/m3. The mean relaxed briquettes bulk density was 208.15 kg/m3, which reflects a volume reduction of about 450%. The maximum density of the briquettes ranged from 789 to 1372 kg/m3. For the expansion characteristics, the maximum and minimum axial relaxation occurred in the first 30 min of the extrusion. All the processing parameters were found to be significant at P<0.05 test level for all the measured characteristics. The briquettes were kept for six months under ambient condition without deterioration.

Keywords: Guinea corn, briquettes, residue, parameters

African Journal of Biotechnology, Vol 13(46) 4320-4329

Author Biographies

SJ Bolufawi
Department of Agricultural Engineering, Federal Polytechnic Bida Niger State, Nigeria
AI Bamboye
Department of Agricultural and Environmental Engineering, Unviersity of Ibadan, Oyo State, Nigeria

Journal Identifiers

eISSN: 1684-5315