Abstract: A fluid particle separator comprises a tube having an output end open to atmospheric pressure for transporting axially migrated particles suspended in a carrier fluid. A physical barrier, such as a smaller diameter tube axially inserted near the output end of the tube, and resistance matched to the tube, allows separation of the axially migrated particles from the carrier fluid by being designed so that the pressure drop from its inlet to its outlet is substantially equal to the pressure drop in the remainder of the tube from the barrier to the tube output end.

Abstract: A method for producing a microalgae based foodstuff is disclosed wherein a mixture containing water as a solvent, Spirulina cells, and a gelling agent comprising either agar or a mixture of agar and cornstarch is heated to a temperature of 100.degree. Centigrade or more. After the heated mixture is cooled to a temperature of 40.degree. Centigrade or less, the mixture is then placed into a shaping device. The cooled mixture in the shaping device is then dried to a predetermined moisture content and the resulting dried, shaped mixture is removed from the shaping device.