The methodical study of the crystal growth processes and electrophoretic separation of the biomixtures have been carried out under microgravity conditions. The mathematical simulation of technological processes was performed by dint of the Navie-Stokes equations, the equations for heat and mass transfer and the Maxwell equations for magnetic and electric fields with reasoned assumptions. The analysis of special space experiment on continuous flow electrophoresis showed that the failures of experiments on biomixture separation with the help of this method are due to hydrodynamic instability of biocomponent jet by the action of vibrations and ponderomotive force in electric field.