All experimental binderless particleboard were manufactured using coffee husk. In this case, we apply a method so called an oxidation method that uses 15% hydrogen peroxide (H2O2) and a Ferro-sulphate (FeSO4) 7.5% catalyst. The methods refer to JIS A 5908-2003 standard. In this paper, through the test, we evaluate some properties of the panel including density, modulus of rupture (MOR), modulus of elasticity (MOE), internal bond strength (IB), thickness swelling (TS) and water absorption (WA). The panel is made with a target density of 0.75 g / cm3 using pressing temperatures of 150,160,170,180 and 1900C. The result shows that, by increasing pressing temperatures, some parameters such as the modulus of rupture, modulus of elasticity and internal bonding of the particleboards tend to increase while their water absorption and thickness swelling decreased. The best physical and mechanical properties of binderless particleboard from coffee husk were obtained in pressing temperature of 1800C. Microscopic study using Scanning Electron Microscopy (SEM) revealed that panels made with pressing temperature of 1800C have bond characteristics that support the improvement of panel properties. Thus, this study addressed that the mechanical and physical properties of the panel were influenced by pressing temperature.

Coffee waste is a by-product from processing coffee beans which has the potential to be used as a reinforcing feed material (concentrate) for ruminants. The waste of coffee fruit is physically quite large in composition, that is 48% of the pulp and the rest is waste. The disadvantages of this coffee waste to be used as feed are its high fiber content (21%), caffeine and tannin and its voluminous physical form. But all this can be overcome by fermentation using Aspergius Niger so as to increase its nutritional value. This research was carried out by making a feed composition including: P0 = 0% coffee husk waste (control) and 98.75% rice bran, P1 = 30% coffee husk waste and 68.75% rice bran, P2 = 60% coffee husk waste and 38.75 rice bran and P3 = 90% coffee husk waste and 8.75% rice bran. The variables observed were the physical characteristics of the feed wafer including: aroma, color and density and palability. Data was collected and analyzed using ANOVA and Duncan Range Test. The results showed the use of coffee husk waste should be used at a level of 30%, because it has a high palability value and low density and crumbs so it is easier for ruminant animals to consume.

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The objective of this research was to evaluate the characteristic of composite boards made from coir, plastic waste, and urea formaldehyde (UF). The board samples were manufactured at a target density of 0.7 gr/cm3. The weight ratio of waste plastic and coir was 50: 50. The UF adhesive added at 0%, 4%, 8%, 12% and 16% of the total weight of the composite board. The result shows that the characteristic of composite boards improves with UF adhesive added, however, no significant difference was found statistically.