How to grow Chlorella?
The cultivation of Chlorella has the longest tradition in Asiatic countries, especially Japan, where it has been used for human nutrition, pharmaceutics and cosmetics in an annual amount of several thousands of tonnes. The use has lately involved the so-called aqua-cultures – in which the alga is a valuable component of the food chain in directed intensive-breeding colonies for delicate fish and shrimp species. Chlorella is usually grown in concrete circular ponds up to 45 m in diameter, with agitation by a rotating arm (resembling a clock dial with the second hand running around), or, in horizontal oblong basins (known as “raceway ponds”) in which a 20 – 30 cm thick layer of inorganic nutrient solution with algae, exposed to sunlight and bubbled by carbon dioxide, is continuously moved by means of paddlewheels. The Tebo culture technology, developed and optimised since 1960, is very different. It is based on a system of inclined areas on which the algal suspension continuously flows d
