You already warned about the ...

You already warned about the salt water mist that might increase the salinity of the compost mixture.  Also, we careful about the material being composted.  Composting will work even on higher salinity wastes and the salt water mist.  However, when you use the compost for agricultural uses, the elevated salinity might kill the plants.  One compost facility was using crab wastes that worked fine and made a good compost.  However, when used it killed the plants.  So, salinity of the final product should be checked.  Below 500 ppm would be preferred.  Higher salinity needs to check the plants that you plan to use with.