Raceway pond used for the cultivation of microalgae. The water is kept in constant motion with a powered paddle wheel.
A raceway pond is a shallow artificial pond used in the cultivation of algae.
The pond is divided into a rectangular grid, with each rectangle containing one channel in the shape of an oval, like an automotive raceway circuit. From above, many ponds look like a maze. Each rectangle contains a paddle wheel to make the water flow continuously around the circuit.