  This paper focuses on mixing strategies and designing shape of the bottom
topographies to enhance the growth of the microalgae in raceway ponds. A
physical-biological coupled model is used to describe the growth of the algae.
A simple model of a mixing device such as a paddle wheel is also considered.
The complete process model was then included in an optimization problem
associated with the maximization of the biomass production. The results show
that non-trivial topographies can be coupled with some specific mixing
strategies to improve the microalgal productivity.
