We want to test having exercise bikes in the sea that collect debris at the same time as the cyclist gets exercise. There should preferably be at least two bicycles next to each other so that there is a competition between those who cycle.
The sea contains debris that has a negative effect on the environment. The harbor basin is often filled with debris which, with the help of the waves, collects at the quayside, for that reason it is a good location for the bicycles. By engaging citizens, they can feel that they are making a contribution to the environment while getting exercise.
When someone rides the bike, the pedals drive a paddle wheel in the water that rotates backwards. The paddle wheel then collects plastic and other debris in a container. To make cycling extra fun, it would be optimal if there had been meters that show the weight of collected rubbish and show cycling distance. It would have been perfect if it is possible to have the bikes on plexiglass so that the cyclist can see what is happening in the water.
A reverse gear must be fitted to turn so that the rotation goes inwards and empties the debris into a container. Containers and wheels need to be in perforated (hollow) metal to get rid of seawater. The wheel should follow sea level differences to reduce pedal resistance.