Better Glues from Peanut Meal

The possibility of manufacturing high grade plywood glues from fermented peanut meal could have economic importance in India. Improvement of peanut meal for glues by fermentation was investigated in the author’s Ph.D. research at the University of Washington, and the conclusions reached in his thesis are summarized. Peanut meal was fermented by barley diastase at 50?C. During fermentation the pH of the meal suspension drifted progressively toward the isoelectric point of the peanut protein, pH 4 to 5, thus, along with the heat, contributing to the coagulation of the peptized protein. Enrichment of the protein in peanut meals to the extent of 12 to 14 percent by fermentation assures higher strength and water-resistance of the resulting glues. These glues have the advantages of a working life of more than 3 hours and a closed assembly period of more than 15 minutes. The dry and wet shear strengths of protein enriched peanut meal glues were higher than those of standard commercial soybean glues.

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