Production of Panelboard from Residue Left from the Fermentation of Organic Waste for Methane

Urban solid waste was fermented to produce methane and the residue was made into panelboards. Analyses showed that the cellulose/lignin ratio was 6.9:1 for the raw waste and 2.9:1 for the fermented residue, an indication of depolymerization. Twenty-four 1/4-inch boards were tested. Boards containing no phenol-formaldehyde adhesive, or 2, 4, or 8 percent of the weight of the furnish, were wet-formed, hot pressed, and post-cured at 140?C for either 15, 30, or 45 minutes. The mean SG of the boards was 0.73 0.06. The MOR ranged from 510 psi to 1,520 psi, averaging 1,010 psi. MOR (Y) was positively correlated with (X), Y, psi = 1,453 – 52. MOE ranged from 68,930 psi to 171,390 psi, averaging 112,350 psi. IB ranged from 10.6 to 34.0 psi. The maximum value was 43.5 psi for a sample containing 8 percent resin and post-cured for 30 minutes. The mean modulus of hardness was 6400 1b./in. Linear expansion was less than 1 percent when the samples were transferred from 20? C/50% RH to 20? C/90% RH, only a fraction of the swelling one would expect for wood. The result was attributed to changes in the chemical/ physical properties of the residue brought about by fermentation. The mean MC for specimens containing no adhesive and conditioned at 20?C/15% RH was 6.1 percent, about half the EMC for solid wood exposed in a similar environment. Flame-spread ratings (2-ft. tunnel) ranged from 66 to 131; for untreated board it was 103. Overlaying the board with birch veneer increased MOR by 3 times and MOE nearly 6 times.

You must be logged in to download any documents. Please login (login accounts are free) or learn how to Become a Member