Biomedical Engineering Reference
In-Depth Information
Source
: Wu and Ye 2007.
Figure 5. Effect of metal ions and pH on flocculation activity and flocculating rate of kaolin suspension
by γ-PGA from
B. subtilis
(DYU1). Metal concentration (mM): Al
2
(SO
4
)
3
=37.5; Fe
2
(SO
4
)
3
=12.5;
FeSO
4
=32.9; CaCO
3
=49.9; NaH
2
PO
4
=32; KH
2
PO
4
= 36.7.
3.4. Effect of Temperature
The flocculation activity declined linearly with a rise in incubation temperature (30-
120°C) of the reaction mixture containing kaolin suspension (5 g/L), metal cation (5 x 10
-3
mM) and γ-PGA isolate from
B. subtilis
DYU1 (40 mg/L) [31]. The optimum flocculation
