sodium acetate in this study, information about whether

phenol and 2,4-DCP can induce the enzyme required for PCP

degradation could have been obtained. 2,4-Dichlorophenol

degrading bacteria had only a moderate effect on PCP

degradation.

 To confirm phenol's role in PCP degradation, another

multi-compound experiment was performed. Samples with

different phenol to PCP concentration ratios were examined.

Only PCP concentrations were monitored and the results are

presented in Table 5-19, Table 5-20 and Figure 5-28.


Table 5-19. Apparent biodegradation rate constants for PCP
 co-metabolized with phenol.


 Sample Conc. K STD ERR t
 Ratio* (PBday) of KBD (ay) R

 #601 5:1:1 2.00x10-2 4.32x10- 34.7 0.75
 #602** 5:1:1 9.27x10 2.52x10-3 74.8 0.66
 #604 5:0:1 1.62x10 3.39x10 3 42.8 0.76
 #605 1:1:1 1.14x10- 2.90x10 3 60.8 0.68

 Phenol:2,4-dichlorophenol:pentachlorophenol ratio.
 ** Without adding sludge, others with 2 ml sludge.


Table 5-20. Conservative biodegradation rate constants for
 PCP co-metabolized with phenol.


 Sample Ratio K STD ERR t
 (l1$ay) of KBD ( ) R2
 -2 -3
 #601 5:1:1 1.57x10_2 2.34x103 44.1 0.88
 #602** 5:1:1 5.80x10-_ 1.77x10- 119.5 0.64
 #604 5:0:1 1.28xl0- 1.86x10- 54.1 0.89
 #605 1:1:1 6.07x10 3 0.80x10- 114.2 0.91

 Phenol:2,4-dichlorophenol:pentachlorophenol ratio.
 ** Without adding sludge, others with 2 ml sludge.