How much shipping movement is expected on a daily basis? 

This will depend on the size of the coasters and barges used. If the entire throughput volume of 5.4 MTPA is delivered this can vary between 300-600 ships per year. Transshipment (ships delivering CO2 and after temporarily storing it exporting it again) can add to these numbers.

What volumes can be put through?

Initially 5.4 million tonnes per year (Mtpa), eventually the capacity may be increased to 15 Mtpa, depending on the market demand.