Process to produce biomass and proteins by microalgae by providing a medium including vinasse and additional carbon dioxide

摘要

Disclosed is a process for the production of biomass and proteins from microalgae, intended for human or animal feed or for other uses, wherein said process comprises the following steps: - providing a culture medium including vinasse and carbon dioxide for culturing said microalgae; - addition of the said microalgae to said culture medium; and - collecting a fraction of microalgae biomass, in which the vinasse is, optionally, diluted and the carbon dioxide is in a concentration of between 0.1 to 100%. Further disclosed is a process for the production of biomass and proteins from microalgae, characterized by comprising the following basic steps: (i) adequation of the vinasse by adding water and alkali until a pH value of about 6.0-11.0 is reached; (ii) delivery of pre-adjusted vinasse to an inoculation tank; (iii) addition of microalgae to the inoculation tank until a concentration of about 0.2 g/I of initial biomass is reached in the cultivation medium based on vinasse; (iv) delivery of inoculated vinasse to an algal biomass cultivation tank; (v) injection of air containing 0.1-100% highly pure carbon dioxide to the algal biomass cultivation tank; (vi) keeping algal biomass at an average temperature between 25 and 35°C under natural light intensity; (vii) delivery of algal biomass to a separation unit, where a fraction of algal biomass and a fraction of water supernatant will be generated; (viii) recycle of the fraction of water supernatant to the inoculation tank.