Abstract |
Plywood plants generate wastewater from the cleanup of glue mixing equipment and glue spreaders. Some of the wastes are toxic to fish and all are high in pollutional strength. Treatment of these glue wastes varies from plant to plant, but generally consists only of solids separation or the removal of suspended matter. Biological treatment investigations showed that BOD removals of 90+ percent can be attained where protein and urea glues are involved; however, this process proved unworkable for the phenolic glues and the process of incineration was shown to have good potential. Wastewater reuse offers the best waste disposal answer for the phenolic glues and possibly also for the protein and urea glues. (Author Modified Abstract) |