Abstract: Methods of culturing microalgae in a continuous auxostat system are described herein. The methods may be used in mixotrophic culture conditions, and may be used in systems comprising open or closed bioreactor systems.

Abstract: Methods of growing organisms in the Thraustochytriaceae family using a supply of at least one of acetate and acetic acid as an organic carbon source are described. Embodiments include using acetate or acetic acid in combination with other organic carbon sources and with a pH auxostat system.

Abstract: Disclosed are techniques and systems for producing microbials having anaplerotic oils that are rich in odd-chain fatty acids, and other beneficial components, at higher concentrations than those present in other natural dietary sources of OCFA, at lower cost, and higher production yield. Such compositions can comprise pentadecanoic and heptadecanoic fatty acids. The techniques described herein include methods for producing and deriving such compositions rich in odd-chain fatty acids from microbials, including microalgae and yeasts/fungi.

Abstract: Methods of culturing microorganisms in non-axenic mixotrophic conditions are disclosed. A method of culturing microalgae mixotrophically and controlling bacterial contamination with an acetic acid/pH auxostat system is specifically described. Methods of culturing microalgae mixotrophically with an increased productivity through an increase in oxygen transfer to the culture are also described.

Abstract: Methods of culturing mixotrophic microorganisms in a state of balanced gas composition are disclosed. Parameters of a culture of mixotrophic microorganisms may be controlled to reduce the requirements of externally supplied gases and optimize the production and consumption of gases within the culture by the phototrophic and heterotrophic metabolisms of the mixotrophic microorganisms.

Abstract: Methods of culturing mixotrophic microorganisms in a state of balanced gas composition are disclosed. Parameters of a culture of mixotrophic microorganisms may be controlled to reduce the requirements of externally supplied gases and optimize the production and consumption of gases within the culture by the phototrophic and heterotrophic metabolisms of the mixotrophic microorganisms.

Abstract: Methods and apparatus for culturing microorganisms are described, including culturing in mixotrophic culture conditions. A bioreactor array with multiple culture vessels with independently controllable inputs is used to culture similar cultures of microorganisms in which at least one parameter differs from other culture vessels in the bioreactor array.

Abstract: Methods and apparatus for culturing microorganisms are described, including culturing in mixotrophic culture conditions. A bioreactor array with multiple culture vessels with independently controllable inputs is used to culture similar cultures of microorganisms in which at least one parameter differs from other culture vessels in the bioreactor array.

Abstract: Methods of culturing microorganisms in combinations of phototrophic, mixotrophic, and heterotrophic culture conditions are disclosed. A culture of microorganisms may be transitioned between culture conditions over the life of a culture in various combinations, utilizing various conditions in a sequential manner to optimize the culture for growth or product accumulation.

Abstract: Methods of culturing microorganisms in non-axenic mixotrophic conditions are disclosed. A method of culturing microalgae mixotrophically and controlling bacterial contamination with an acetic acid/pH auxostat system is specifically described. Methods of culturing microalgae mixotrophically with an increased productivity through an increase in oxygen transfer to the culture are also described.

Abstract: Disclosed herein are aquafeed, animal feed and fertilizer compositions comprising microalgae enriched with minerals and a method of enriching microalgae with minerals in non-metabolized form. Specifically, the method includes the creation of an enriched microalgae product through the assimilation, reversible chelation, and absorption of supplemental minerals required in the diet of adult fish and other aquatic animals which minimizes leaching of the supplemental minerals before ingestion by the fish. Additionally, the enriched microalgae product can be used as both a direct feed or fertilizer, or as part of an aquafeed, non-aquatic animal feed, or plant fertilizer mixture. The combination and proportion of the minerals can be adjusted to the animal or plant receiving the mineral enriched algae composition.

Abstract: Methods of treating contamination, particularly bacterial contamination, in an open culture of microalgae with organic carbon are described herein. The methods comprise reducing the pH of a culture for a period of time and then raising the pH of the culture, wherein the culture comprises the presence of a first acid and the culture is contacted with a second acid to reduce the culture pH from a first pH value to a second pH value. The culture is maintained at the second pH value for at least 5 minutes before the culture pH is raised from the second pH value by contact with a base.

Abstract: Methods of treating contamination, particularly bacterial contamination, in an open culture of microalgae with organic carbon are described herein. The methods comprise reducing the pH of a culture for a period of time and then raising the pH of the culture, wherein the culture comprises the presence of a first acid and the culture is contacted with a second acid to reduce the culture pH from a first pH value to a second pH value. The culture is maintained at the second pH value for at least 5 minutes before the culture pH is raised from the second pH value by contact with a base.

Abstract: Bioreactor systems for culturing mixotrophic microorganisms in open cultures on a large scale are disclosed herein. Embodiments of the system comprise organic carbon delivery systems and submersible thrusters suspended on adjustable support structures.

Abstract: Methods and apparatus for culturing microorganisms are described, including culturing in mixotrophic culture conditions. A bioreactor array with multiple culture vessels with independently controllable inputs is used to culture similar cultures of microorganisms in which at least one parameter differs from other culture vessels in the bioreactor array.

Abstract: Methods of treating contamination, particularly bacterial contamination, in an open culture of microalgae with organic carbon are described herein. The methods comprise reducing the pH of a culture for a period of time and then raising the pH of the culture, wherein the culture comprises the presence of a first acid and the culture is contacted with a second acid to reduce the culture pH from a first pH value to a second pH value. The culture is maintained at the second pH value for at least 5 minutes before the culture pH is raised from the second pH value by contact with a base.

Abstract: Methods of culturing mixotrophic microorganisms in a state of balanced gas composition are disclosed. Parameters of a culture of mixotrophic microorganisms may be controlled to reduce the requirements of externally supplied gases and optimize the production and consumption of gases within the culture by the phototrophic and heterotrophic metabolisms of the mixotrophic microorganisms.

Abstract: Methods of culturing microorganisms in combinations of phototrophic, mixotrophic, and heterotrophic culture conditions are disclosed. A culture of microorganisms may be transitioned between culture conditions over the life of a culture in various combinations, utilizing various conditions in a sequential manner to optimize the culture for growth or product accumulation.

Abstract: Methods of culturing microorganisms in non-axenic mixotrophic conditions are disclosed. A method of culturing microalgae mixotrophically and controlling bacterial contamination with an acetic acid/pH auxostat system is specifically described. Methods of culturing microalgae mixotrophically with an increased productivity through an increase in oxygen transfer to the culture, and controlling bacterial contamination with an oxidative agent are also described.