Aerobic Composting Plant on the Shore

Due to some unforeseeable situations, we are being asked to set up an aerobic composting plant on the beach shore.

I was wondering if the system might turn toxic and might lead to the death of aerobic bacteria? 

It would be a great help if someone could comment on this. Thanks in advance.

I have provided an image of the aerobic composting plant (reinforced concrete structure) which would be constructed on the shore.