. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. CALIFORNIA FISH AND GAME 411 Centrifugal process '^ Many advantages are claimed for the centrifugal method of han- dling press liquor over the settling tanks system. In actual practice the claims seem to be well substantiated. The application of this method to the fish reduction industry in the East and in Europe and Asia seems to be more general than in California. Its success in our own plants is apparently indicative of a more gene
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. CALIFORNIA FISH AND GAME 411 Centrifugal process '^ Many advantages are claimed for the centrifugal method of han- dling press liquor over the settling tanks system. In actual practice the claims seem to be well substantiated. The application of this method to the fish reduction industry in the East and in Europe and Asia seems to be more general than in California. Its success in our own plants is apparently indicative of a more general appli- cation on the Pacific coast. It is claimed that this method greatly reduces the free fatty acid content of the oil, produces oil of a better color and lower moisture content, and reduces the oil and solid content of the stick water. This process of oil recovery consists essentially of two steps: first, the bulk of the solids is removed from the press liquor; and second,. Fig. 138. The bulk centrifuge. The motor shaft between the The skimming nozzle and its adjusting device are attached to the outer shell of the basket. Photograph by S. Ross Hatton. the oil and water are separated from each other, and some additional solids are recovered. The solids in the first step are removed by a motor-driven suspended solid basket centrifuge, commonly called the bulk centrifuge, developed to meet the need of removing solids so that the liquid components of the discharge could be handled by ordinary mechanical separating methods. Press liquor enters a feeding tank, then flows into the basket of the bulk centrifuge. As the name indicates, this basket is suspended on a center shaft attached to an overhead motor, and under operating conditions it revolves at a speed of 1200 revolutions per minute, a speed which gives a centrifugal force equal to about 800 times the " The authors wish to express an indebtedness to Mr. T. .T. Griffin for much of the material contai
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