Authors :
Tekola Tessema Delbole; D. D. Ajayi
Volume/Issue :
Volume 6 - 2021, Issue 4 - April
Google Scholar :
http://bitly.ws/9nMw
Scribd :
https://bit.ly/3bw3jKR
Abstract :
Organic wastes accumulation and disposal is
always creating an environmental crisis. Hence, there is a
shortfall of proper management of these wastes. Changing
these biomass wastes in to another important product like
briquettes is advantageous. Beside this, too much energy
Ethiopia consumes comes from sources that are likely to
be out of stock in the near future. The traditional way of
collecting fuel wood has been going on for long time
resulting in the depletion of the forest. The use of biomass
as a fuel, however, requires knowledge of its heating
performance. This study is therefore aimed to evaluate
the heating value of biomass briquettes and conventional
fire wood. Briquette from four selected solid wastes
(Bagasses, Waste paper, Fruits peels and saw dust) were
developed and the heat value of the briquette was
compared with eucalyptus fuel wood. Energy evaluation
test of briquettes and fuel wood was made using the Parr
Isoperibol bomb calorimeter. Results of the investigation
showed that, mean value of the bulk density of the
selected samples of briquettes and fuel wood are 2.94
g/cm3 and 6.1457 g/cm3 respectively. Average moisture
content of biomass briquettes is 3.06% while average
moisture content of fuel wood is 7.5%. Mean heat value of
briquettes and fuel wood is 16.27kj/g and 20.439kj/g
respectively. It is proved that although fuel wood gave the
slightly higher average heat value than briquettes, they
have similar heat value at 95% level of significance. It is
therefore concluded that briquettes with higher calorific
value which could make excellent fuel can be produced
from biomass solid wastes. Generally, briquettes have
adequate thermal calorific values and therefore can
substitute the utilization of conventional types of fuels
Keywords :
Ash Content, Bulk Density, Heat Value Moisture Content.
Organic wastes accumulation and disposal is
always creating an environmental crisis. Hence, there is a
shortfall of proper management of these wastes. Changing
these biomass wastes in to another important product like
briquettes is advantageous. Beside this, too much energy
Ethiopia consumes comes from sources that are likely to
be out of stock in the near future. The traditional way of
collecting fuel wood has been going on for long time
resulting in the depletion of the forest. The use of biomass
as a fuel, however, requires knowledge of its heating
performance. This study is therefore aimed to evaluate
the heating value of biomass briquettes and conventional
fire wood. Briquette from four selected solid wastes
(Bagasses, Waste paper, Fruits peels and saw dust) were
developed and the heat value of the briquette was
compared with eucalyptus fuel wood. Energy evaluation
test of briquettes and fuel wood was made using the Parr
Isoperibol bomb calorimeter. Results of the investigation
showed that, mean value of the bulk density of the
selected samples of briquettes and fuel wood are 2.94
g/cm3 and 6.1457 g/cm3 respectively. Average moisture
content of biomass briquettes is 3.06% while average
moisture content of fuel wood is 7.5%. Mean heat value of
briquettes and fuel wood is 16.27kj/g and 20.439kj/g
respectively. It is proved that although fuel wood gave the
slightly higher average heat value than briquettes, they
have similar heat value at 95% level of significance. It is
therefore concluded that briquettes with higher calorific
value which could make excellent fuel can be produced
from biomass solid wastes. Generally, briquettes have
adequate thermal calorific values and therefore can
substitute the utilization of conventional types of fuels
Keywords :
Ash Content, Bulk Density, Heat Value Moisture Content.
