In order to reduce the cultivation area re uired for the p w t h of higher plants in space adoption o? algae. which ave a hipher photosynthetic ability, seems very suitable for obtaining oxygen and food as a useful source of high quality protein.The preliminary cultivation experiment for determining optimum cultivation conditions and for obtaining the critical design parameters of the cultivator itself has been conducted. Spirulina was cultivated in the 6-liter medium containing a sodium hydrogen carbonate solution and a cultivation temperature controlled using a thermostat. Generated o x r g e n r was separated using a pol propyrene porous ho low I er membrane module. Througt this experiment, oxygen gas (at a mnccntraiion of more than 46%) a t a rate of 100 -150 ml per minute could be obtained.

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