Surface area of biofilm

Finally, I got the answers already!!

I didnt use the method of calculating as suggested by the company, I just use the normal maths calculation..

1. calculating the total surface area of bioblock (14)
2. calculating the surface area of reactor (cylinder)
3. Total surface area of biofilm= (1)+(2)....TADA!

the unit for biological sulphide produced per biofilm surface area would be in mg S/L.m2