Hi

you can read

https://www.aidic.it/cet/18/64/025.pdf

he Effect of the Drying Process on the Properties of Bacterial Cellulose Films from Gluconacetobacter hansenii

Freeze-drying (lyophilization) is generally the best drying method available until now for drying organic materials. The time of drying by lyophilization depends on the type of material and the thickness of sample.

For sample found in Petri dishe or glass bottle for exampl, the sample thickness preferably should be less than 1 cm. As the sample thickness increases the drying time increases.