Culture method and culture system for microalgae
AssigneesDenso Corporation, Kyoto University, Chuo University
InventorsMinoru Kurata, Hiroaki Fukuda, Norihide Kurano, Hideaki Miyashita, Shigeaki Harayama
Life of this patent
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Abstract
A culture method for microalgae that cultures unicellular green microalgae belonging to the genus Coccomyxa and groups of organisms closely related thereto, or the Watanabea clade, in an open outdoor culture system using broth having a pH of 4 or lower. A culture method for microalgae that cultures microalgae of the genus Coccomyxa and groups of organisms closely related thereto, or Pseudococcomyxa, in an open outdoor culture system using broth having a pH of 4 or lower containing ammonia nitrogen.
Claims11
A culture method for microalgae comprising:
- preparing culture liquid including ammonia nitrogen, a pH of the culture liquid being equal to or less than 4;
- adjusting the pH of the culture liquid to a predetermined value before inoculation of a microalgae;
- culturing, in a raceway culture tank containing the culture liquid, microalgae of a genus Coccomyxa or a genus Pseudococcomyxa in an outdoor open culture system in a range of 15-35 degrees Celsius,
- insolating the raceway culture tank by using the sun as a light source during the culturing;
- and
- continuously introducing CO2 into the raceway culture tank through an introduction portion of the raceway culture tank during culturing.
An open culture system comprising:
- a raceway culture tank;
- a detector that is placed at the raceway culture tank and detects at least one parameter including pH, CO2 concentration, and concentration of algae in a culture liquid, the at least one parameter configuring a parameter group;
- and
- a controller that controls the at least one parameter in a respective predetermined range,
- wherein:
- pH of the culture liquid is 4 or less;
- the culture liquid includes urea as ammonia nitrogen;
- the open culture system cultures a microalgae of a genus Coccomyxa or of a genus Pseudococcomyxa under insolation by sun in a range of 15-35 degrees Celsius.
Dependencies are inferred from the claim text.