Articles

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.

Effect of Goat Dung Charcoal Blend of Lontar Shell and Other Biomass on Physical and Chemical Properties of Biocharcoal Briquettes

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This study aims to determine the physicochemical properties of biocharcoal briquettes blend of goat dung charcoal, lontar shell charcoal and various biomasses. This study used a completely randomised design with 4 treatments and 4 replicates. The treatments were T1: 50% goat dung charcoal + 40% lontar shell charcoal + 10% lontar male fruit charcoal, T2: 50% goat dung charcoal + 40% lontar shell charcoal + 10% rice husk charcoal, T3: 50% goat dung charcoal + 40% lontar shell charcoal + 10% corn cob charcoal, T4: 50% goat dung charcoal + 40% lontar shell charcoal + 10% lamtoro twigs charcoal. The variables studied were briquette yield, density, moisture content, ash content, calorific value, volatile matter, and fixed carbon. The statistical analysis showed that the treatment had a very significant effect (P<0.01) on density, moisture, ash content, calorific value, volatile matter, and fixed carbon, but no significant effect (P>0.05) on yield. The average of yield 56.41%, density 0.68g/cm3, moisture  5.39%, Ash 22.24%, fixed carbon 43.04%, volatile matter of 29.34% and calorific value 4555.67 cal/g.  It was concluded that biocharcoal briquettes produced blend of goat dung charcoal, lontar shell, and various biomasses (lontar male fruit, rice husk, corn cob and lamtoro twigs) had varying physical and chemical properties, but in this study using lontar male fruit charcoal, rice husk and lamtoro twig, were better.

The Influence of Different Ratio of Goat Dung and Lontar Shells (Borassus Flabellifer Linn) Charcoal on the Biochar Briquettes Properties

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Research goals was to determine the physico-chemical and burning propersties of biochar briquettes with different ratios between goat dung and lontar shell charcoal. Material used were goat dung, lontar shell, tapioca as binder and water. The equipment were kiln drum (pyrolysis drum), grinding machine, hydraulic pressor, briquette stove, infrared digital thermometer, digital hanging scales, digital sitting scales. Variables measured were density, moisture, ash, volatile matter, fixed carbon, calorific value, burning rate and burning resistance. Analysis of variance was applied to determine the influence of treatment on the variables measured. Result of analysis showed that treatment had a very significant (P<.01) on moisture, ash, volatile matter, fixed carbon, calorific value, burning rate and burning resistance, but no significant (P>.05) on density of biochar briquettes. More proportion of goat dung charcoal generated the biochar briquettes with properties more ash content, lower fixed carbon, higher volatile matter, reduced calorific value, faster burning rate, shorter burning resistance. It can be concluded that the physico-chemical and burning properties of the biochar briquettes generated in this study did not meet the standards according to SNI 01-6235-2000. In this case, however, the best ratio is 25% of goat dung charcoal and 75% of lontar shell charcoal.