Simultaneously Recovering High-Purity Chromium and Removing Organic Pollutants from Tannery Effluent

Figure 3

The change of TOC with the amount of acid enzyme activities (the combination of acid protease and lipase represented, resp., in (c): (0) control group, (1) 1.8 and 14.4 U, (2) 2.7 and 21.6 U, (3) 3.6 and 28.8 U, and (4) 4.5 and 36 U).

(a)

(b)

(c)