I have installed a few of ...

I have installed a few of both types in my time. With the passive screens they usually need to have a good depth at the intake (typically 2 times diameter). Often the solution is to divide into smaller units but this increases cost. With the passive screens the screenings stay in the water and so there is not a need to dispose of them. The water requirements of fish return and the pressures usually demanded means that this incurs a significant energy cost.