| http://www.w3.org/ns/prov#value | - The photobioreactor may be constructed as a single piece or as multiple pieces, such as a separate upper part of the chamber and lower part of the chamber, joined together, and in an embodiment is made from lightweight and inexpensive materials, including rigid materials such as extruded plastic, molded plastic domes, glass, fiber glass, plastic sheets or panels, and flexible materials, such as pl
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