Question

Biological oxidation of phenylacetic acid is inhibited by propionic acid present in wastewater. The following data were obtained for enzymatic oxidation of phenylacetic acid at different concentrations of propionic acid:

S (mM)	0.25	0.4	0.5	0.6	0.75	1.0
V (mM/l-h), I=0	1.0	1.7	1.9	2.1	2.4	2.5
V (mM/l-h), I = 1mM	0.65	1.1	1.3	1.4	1.8	2.2
V (mM/l-h), I = 2mM	0.55	0.9	1.0	1.3	1.4	1.8

1. What kind of inhibition is this?
2. The value of V_m, K_m, K_I.

Answer 1