Table 3: Residual crude protein and ash content in decalcified shrimp shells and raw chitin flakes during purification by a two-step biological process.

Biological processCrude protein
(%, w/w)
Ash content
(%, w/w)

First step: L.  pentosus L7 fermentation
24 hours
48 hours

Second step: deproteinization with B.  thuringiensis SA
24 hours
48 hours
72 hours