What is the exact formula to measure specific surface area of water plastic bottle cap?

30 August 2023 1 782 Report

I am using water plastic bottle cap as a biocarrier in MBBR reactor. how could I measure the surface area or SSA(m2/m3) of the cap that has three holes on top?

thank you for contribution

Sazan Mohammed Ali

Thank you dear Mohd Redzuan Mohd Sofian for you answer, but is there any other methods?

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