The optimas residence times of the reactors have been chosen experimentally by variation of wort feeding rate. The optimas residence time for calcium pectate gel gas-lift bioreactor with the minimum concentration of saccharides 27.2 g/lon the output of reactor was 12.75 h (Table 1, Figure 1). The maximum specific rate of saccharide utilisation for this carrier in gas-lift bioreactor was 5.64 g/l.h but the saccharide concentretion on the output increased to 29.8 g/l. In the gas-lift reactor - a homogeneous type of reactor - it is impossible to achieve the total fermentation of saccharides to ethanol as the substrate entering the reactor is mixed with the wort already fermented. The minimum concentration of saccharide on on the output of our reactor for calcium pectate beads was 27.2 g/l while the concentration of unfermentable saccharides in the wort varies from 18 to 20 g/l. No significant difference in parameters studied was observes between the calcium pectate and calcium alginate beads.