What is the appropriate method for grinding plant fibres into powder for water treatment?

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A.T. Towolawi

It depends on the previous journal articles from where the method is considered. However, air dry (under room/ controlled temperature without direct sunlight) or sun dry. The former is scientifically preferred.

Enovwo Erere Odjegba

I want to thank everyone for their contributions to my question. I have been able to grind the fibre into powder. The process used is called CRYOGENIC MILLING. The link below is an example of the cryogenic milling process:

https://www.youtube.com/watch?v=nVtnD4niV3c

Regards