NOVELTY - Growing algae in a bioreactor having extra capillary space and inner capillary space separated by a liquid-permeable membrane comprising several hollow fiber membranes with each hollow-fiber membrane (including a hollow interior and made of liquid-permeable, algae-impermeable material) involves growing algae in extra capillary space; extracting lipids from the algae; and transferring the lipids from extra capillary space to inner capillary space through the liquid-permeable membrane while containing the algae to the extra capillary space and without killing the majority of the algae.    USE - For growing algae in a bioreactor having an extra capillary space and an inner capillary space separated by a liquid-permeable membrane comprising several hollow fiber membranes with each hollow-fiber membrane (including a hollow interior and made of a liquid-permeable, algae-impermeable material) (claimed) used to produce both animal feed and bio-diesel fuels; in cosmetic industry; and for producing butanol and animal nutrition supplements.    ADVANTAGE - The method removes the lipid from algae without the need to harvest/kill the algae.    DETAILED DESCRIPTION - Growing algae in a bioreactor having an extra capillary space and an inner capillary space separated by a liquid-permeable membrane comprising several hollow fiber membranes with each hollow-fiber membrane (including a hollow interior and made of a liquid-permeable, algae-impermeable material) involves growing algae in the extra capillary space; extracting lipids from the algae; and transferring the lipids from the extra capillary space to the inner capillary space through the liquid-permeable membrane while containing the algae to the extra capillary space and without killing the majority of the algae, where individual algae specimens are cultured on the outside surface of the hollow fiber membranes. The respective interiors of the hollow fiber membranes at least partially define the inner capillary space, and the interior of a chamber and respective exteriors of the hollow fiber membranes at least partially define the extra capillary space.