Apparatus for cultivating algae

DETAILED DESCRIPTION What we claim is: 1.
An apparatus for cultivating algae, said apparatus comprising (1) a cultivation basin adapted to permit a horizontal circulating flow of cultivation water and composed of a rectangular bottom wall, two upstanding side walls and two upstanding end walls on the edges of the bottom wall and a partition located intermediate the two side walls and connected only to the bottom wall, (2) a flow driving means for circulating the cultivation water, and (3) a flow rectifying means; said flow rectifying means being composed of a support member and a plurality of parallel fins made of a gently curved rectangular thin plate secured to the support member, each of said fins having such a curved surface that two phantom planes tangent respectively to the opposing two side ends of each fin form an angle of approximately 90.
degree.
, and said flow rectifying means being provided at a position connecting a corner at which each of said side walls joins each of said end wall to the end portion of said partition so that one phantom plane containing both the two opposing side ends of each fin forms an angle of approximately 45.
degree.
with respect to said side wall and said end wall.
2.
The apparatus of claim 1 wherein each fin is made of a rectangular thin plate which is curved so that it forms an arc corresponding to 1/4 of a circle at its cross section.
3.
The apparatus of claim 1 or 2 wherein each fin has an extending plane on one or both sides of the curved surface along a phantom plane tangent to the side end of the curved surface.




Description:
This invention relates to an apparatus for cultivating blue-green algae of the genus Spirulina and other aquatic lower algae.
More specifically, the invention relates to an improvement in a cultivating apparatus used for cultivating algae in a cultivating water which circulates through a deflected flow passage.
Generally, the membranes of aquatic algae are fragile, and multi-celled spiral algae such as blue-green algae of the genus Spirulina are more fragile than single-celled spherical algae such as green algae of the genus Chlorella