NOVELTY - Producing lipids (oils) from microalgae, comprises (a) cultivating the microalgae under conditions of natural and/or artificial light (photoautotrophic growth) and under lightless conditions with the addition of a sugar feed obtained from waste from the processing of sugarcane or sugar beet or a sugar feed deriving from food or confectionery industry waste (heterotrophic growth), and (b) separating the lipids (oil) from the microalgae.    USE - The method is useful for producing lipids (oils) from microalgae such as Botryococcus braunii, Chlorella vulgaris, Nannochloropsis sp., Nannochloris sp., Haematococcus pluvialis and Chlorella Protothecoide (all claimed), where the lipids are useful: for energy production; for human nutrition such as palm oil substitutes; in forage industry as supplements; and for the production of high added value substances, preferably vitamins, proteins, substances with pharmaceutical activity and substances as dietary supplements.    ADVANTAGE - The method is capable of economically producing lipids from microalgae with high yield and without depending on environmental conditions.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a plant for the production of lipids (oil) from microalgae comprising at least two production lines set in parallel, where each production line comprises a first laboratory or inoculation step using at least two reactors in which the microalgae are initially cultivated, a second nursery step, in which the microalgae are grown under conditions of artificial light (photoautotrophic growth), using at least 3 reactors, and a third fermentation step, in which the microalgae are grown under lightless conditions (heterotrophic growth) with the administration of molasses, using at least 5 reactors, where the reactors of the second and third steps are connected to one another to ensure the passage of the microalgae from one step to the next.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a method for producing lipids from microalgae.