NOVELTY - Recovering photosynthetic microorganisms for integrated biomass involves: a first stage in which starting from a biomass of microalgae is introduced into a stirring tank in which by using cellulolytic enzymes to liquefy sugars which break down the cell wall and releases soluble carbohydrates, separating the resulting mixture to obtain a clarified rich in carbohydrates; producing bioethanol and other products; producing concentrate peptides and amino acids of the residual biomass; producing biodiesel from the above concentrate; and biogas production.    USE - The method is useful for recovering photosynthetic microorganisms for integrated biomass (claimed).    ADVANTAGE - The method is highly economical, cost-efficient and has high recovery rate.    DETAILED DESCRIPTION - Recovering photosynthetic microorganisms for integrated biomass involves: a first stage in which starting from a biomass of microalgae is introduced into a stirring tank in which by using cellulolytic enzymes to liquefy sugars which break down the cell wall and releases soluble carbohydrates, separating the resulting mixture using a filtration and/or centrifugation process to obtain a clarified rich in carbohydrates and a concentrated waste biomass; a stage of producing bioethanol and other products, such as lactic acid, from clarified saccharified carbohydrates, followed by alcoholic fermentation to transform yeast bioethanol monosaccharides in high yields; a stage of producing concentrate peptides and amino acids of the residual biomass by employing proteolytic enzymes that break down proteins, solubilization in an enzymatic hydrolysis process, and transforming proteins peptides and amino acids in the lower molecular weight which can be used in feed as agricultural fertilizers or high value, then the obtained reaction mixture to be separated by a process of filtration and/or centrifugation giving a clarified rich in amino acids and concentrated peptides-residual biomass; a step of producing biodiesel from the above concentrate above in which the transesterification of the fatty acids present in the biomass with sulfuric acid as catalyst and methanol as the reagent is performed, yielding the corresponding methyl esters constituent, reacting the biodiesel elapsed removed from the reaction mixture using hexane, which is then evaporated to obtain biodiesel; and a biogas production stage in which waste biomass from the previous step is subjected to anaerobic digestion process by action of methanogenic bacteria, for the production of biogas from the mixture the resulting reaction, free of methanol and hexane, where the residual carbonaceous matter contained in it is transformed into methane, hydrogen and carbon dioxide (CO2).