Organic compounds entering and leaving kraft mills aerated lagoons have been identified and determined quantitatively. The compounds found were terpenes and related low B.P. materials, resin and fatty acids, phenols and sugar acids. The terpenes, resin and fatty acids are similar to those present in the wood species being pulped. Some terpenes, phenols and sugar acids are produced during the pulping reactions. About 8 ppm total terpenes were found in the lagoon influent and 1 ppm or less were in the effluent. Alpha-Terpineol was the major compound entering the lagoon and camphor the main terpene in the effluent. The total resin acid concentration entering the lagoon was 3.2 ppm with 0.6 ppm leaving. Fatty acids were lower both entering and leaving the lagoon. Sugar acids were found at about 100 ppm total entering, these were usually completely eliminated in the lagoon. Control of terpenes can be done by in-process steam stripping and the other compounds can be partially controlled by in-plant spill containment.

"ROAP/Task no. 21AZX/018; program element 1BB037; grant 802084." "June 1975." Report prepared by College of Forest Resources, University of Washington, Seattle, Washington,. Includes bibliographical references (pages 57-59).