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Combustion Properties of Biochar Briquettes Blend of Goat Manure Charcoal, Saboak Shell and Other Biomass

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This study aims to determine the quality of combustion properties of biochar briquettes mixed with goat manure charcoal, lontar shell and other biomass. The completely randomized design was applied with 4 different combinations tested, as follows: T1= 50% goat manure charcoal + 40% lontar shell + 10% lontar male fruit; T2= 50% goat manure charcoal + 40% lontar shell + 10% lamtoro twigs; T3= 50% goat manure charcoal + 40% lontar shell + 10% rice husk and T4= 50% goat manure charcoal + 40% lontar shell + 10% corn cob. The variables studied were combustion temperature, combustion rate, combustion resistance, flame color and combustion smoke. The average values obtained consecutively from T1-T4 are as follows: combustion temperature 272.9; 231.5; 228.8 and 280.8˚C; combustion rate 2.03; 1.61; 1.67 and 2.03 g/min; combustion resistance 210.0; 205.0; 195.0 and 225.0 min; flame color and combustion smoke 3.70; 3.65; 3.60 and 3.75. The results of variance analysis showed that the treatment had a very significant effect (P<0.01) on combustion temperature, but no significant effect (P>0.05) on combustion rate, combustion resistance, flame color and combustion smoke. It was concluded that the biochar briquettes produced had good combustion properties with indications of high combustion temperature (253.5°C), slow combustion rate (1.83 g/min), long combustion resistance (208.75 min), bluish red flame colour and no smoke emitted (score 3.68). The best treatment was shown in the mixture of 50% goat dung charcoal + 40% palm shell charcoal +10% corn cob charcoal (T4).

Effect of Goat Dung, Saboak and Corn Cobs Charcoal Mixture on the Physicochemical Properties of Biochar Briquettes

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The experiment goals to investigate the physicochemical properties of biochar briquette mixed of goat dung, saboak shell and corn cob charcoal. Research used a completely randomized design with 4 different treatments were: P1 = 25% of goat dung + 75% saboak shell charcoal; P2 = 25% of goat dung + 50% saboak shell + 25% corn cob charcoal; P3 = 25% of goat dung + 25% saboak shell + 50% corn cobs charcoal; P4 =25% of goat dung + 75% corn cobs charcoal. Variables measured included yield, density, moisture, ash, calorific value, volatille matter and fixed carbon. Data were analyzed according to the statistic analysis procedure. The mean values obtained were yield 57.54%; density 0.62 g/cm3; moisture 4.67%; ash 16.93%; calorific value 5198.75 cal/g; volatile matter 25.18%; fixed carbon 53.23%. The results of variance analysis showed that the treatment had a very significant effect (P<0.01) on density and calorific value but not significant (P>0.05) on yield, moisture, ash, volatile matter and fixed carbon. It can be concluded that using of corn cobs as substitute of saboak shell ini briquettes making blend of goat manure  can be improve the calorific value, with  similar ini yield, moisture, ash, volatile matter and fixed carbon. The best characteristic of briquettes find out  in mixing of 25% goat manure + 25% saboak shell + 50% corn cobs.