Page 62 - Advances in Textile Biotechnology

Developments in enzymatic textile treatments 41

Induced pore velocities

Pore deformation rate
2.6 Expected relationship between the induced pore velocities and the
pore deformation rate.

1 Slow
regime

Fast
E regime

0
0 Time
2.7 Expected enzyme concentration in the fabric as a function of time
for a particular value of α and Pe.

In Fig. 2.7, the enzyme concentration is expressed by a factor E, which is
the ratio between the actual enzyme concentration in the fabric and the
concentration that is achievable after an infinitely long time:

E = C E,f,t [2.8]
C E,f, ∞
where C E,f,t is the enzyme concentration in the fabric at time t and C E,f,∞ is

the enzyme concentration in the fabric after an infinitely long time. Figure
2.7 shows two regimes: a fast and a slow increase of the enzyme concentra-
tion. The fast part of the curve represents the convective transfer process

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