PART II 



INTRODUCTICXJ 



The first part of the report on the utilization of Alaskan salmon 

 cannery waste was published in December 1947. A.t that time the results 

 of the preliminary industrial and econonic surveys were given and the 

 studies on the use of the waste to prepare vitamin A oils and as a 

 source of food for hatchery fish were discussed. The projects included 

 in both the first and second reports were made possible by a research 

 grant from the Industrial Research and Development Division, Office of 

 Technical Services, U. S. Department of Conmerce, to the Alaska Fisher- 

 ies Experimental Commission. Originally a long term research program 

 was planned, but, because of the liquidation of the Industrial Research 

 and Developoaent Divisiwi, the projects had to be terminated within one 

 year. 



The projects included in the second report were chosen from the 

 various possibilities because it was felt that some indication concern- 

 ing their value could be given in the limited period of time before the 

 termination of the project. The phases of the program discussed in this 

 report include the collection of the raw materials in Alaska; utiliza- 

 tion of salmon eggs for the production of cholesterol, protein and ind- 

 ustrial fat; the addition of salmon head oil to canned salmon; the 

 vitamin content of the fish waste products which were used for hatchery 

 foods; and the processing of the cannery waste to obtain vitamin A oils. 



COLLECTION OF RAW MATERIAL IN ALASKA 

 By John A. Dassowl/ 



Collection 



In planning the collection of salmon cannery waste samples, the 

 most important problan was that of obtaining a representative sample 

 of the waste directly from the "Iron Chink." Of the six salmon can- 

 neries in the immediate vicinity of Ketchikan, two were arranged so that 

 the flow of the waste material from the "Iron Ohink" was easily access- 

 ible for the collection of material. One of these two canneries, that 

 of the New England Fish "-ompany, used a step conveyor to transfer the 

 solid waste material from the chutes below the "chinks" to a bin locat- 

 ed at the cannery floor level. During this operation, most of the liquid 

 and much of the smaller parts of the salmon waste are washed out and lost. 

 The larger parts of the waste such as the heads, tails, eggs, milt, and 

 the digestive tract could be collected from the conveyor. Samples from 

 this source were to be used only for chemical analysis and the prepara- 

 tion of products from the specific portions of the viscera. Waste 



IT Chemist, Fishery Technological Laboratory, Fish and Wildlife Service, 

 Seattle, Washington. 



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