5.5.3 Column biodegradation III.


 The third column biodegradation experiment was

performed to examine the effects of different environments

on degradation of phenolic compounds. Column #1 was held

under anoxic condition, column #2 was aerated with

compressed air and column #3 had been supplied with hydrogen

peroxide and maintained at a minimum dissolved oxygen

concentration of 3 mg/l throughout the time of the

experiment. The degradation results are presented in Table

5-23, the DHA assay data are presented in Table 5-24, and

Figures 5-34 through 5-35.


Table 5-23. Column biodegradation III results.


 Compound column K STD ERR t R2
 (1 Hay) of K B ( y)
 BD
 phenol 1 1.15 0.097 0.603 0.98
 phenol 2 1.80 0.181 0.385 0.97
 phenol 3 1.41 0.048 0.491 1.00
 -2 -3
 2,4-DCP 1 7.01xl02 7.20x10 9.89 0.87
 -2 -3
 2,4-DCP 2 9.53x10-2 6.40x10- 7.27 0.94
 2,4-DCP 3 1.07x10 7.30x103 6.49 0.94
 -2 -3
 PCP 1 5.38x02 5.70x103 12.88 0.86
 PCP 2 6.63x10 2 6.40x10 10.45 0.89
 -2 -2
 PCP 3 8.19x10 1.00x10 8.46 0.83

 Conservative estimations -
 PCP 1 4.96x10- 4.70x10 13.97 0.90
 PCP 2 6.57x10-2 6.90x10 10.55 0.88
 PCP 3 7.56x10-2 9.00x10- 9.17 0.85