| |
Total Petroleum Hydrocarbon (TPH) Remaining |
| Group/ Treatments |
C (mg/kg) |
C+A (mg/kg) |
C+A+E5 (mg/kg) |
C+A+E10 (mg/kg) |
C+A+E20 (mg/kg) |
| Day 0 |
15056.86 ± 92.11 |
15056.86 ± 92.11 |
15056.86 ± 92.11 |
15056.86 ± 92.11 |
15056.86 ± 92.11 |
| Day 14 |
12275.36 ±128.03 |
10801.03 ± 11.91 |
3647.29 ± 57.72 |
2693.90 ± 51.57 |
1671.21 ± 80.27 |
| Day 28 |
7590.88 ± 10.54 |
8110.86 ± 60.05 |
1543.58 ± 68.88 |
1112.38 ± 55.08 |
842.85 ± 69.75 |
| |
Total Petroleum Hydrocarbon (TPH) Remaining |
| Group/ Treatments |
C (mg/kg) |
C+A (mg/kg) |
C+A+E5 (mg/kg) |
C+A+E10 (mg/kg) |
C+A+E20 (mg/kg) |
| Day 0 |
15056.86 ± 92.11 |
15056.86 ± 92.11 |
15056.86 ± 92.11 |
15056.86 ± 92.11 |
15056.86 ± 92.11 |
| Day 14 |
12275.36 ± 128.03 |
10801.03 ± 11.91 |
3647.29 ± 57.72 |
2693.90 ± 51.57 |
1671.21 ± 80.27 |
| Day 28 |
7590.88 ± 10.54 |
8110.86 ± 60.05 |
1543.58 ± 68.88 |
1112.38 ± 55.08 |
842.85 ± 69.75 |
|
Key:
C = Contaminated soil (control)
C + A = Contaminated soil + brewery mash
C + A + E5 = Contaminated soil + brewery mash + 5 earthworms
C + A + E10 = Contaminated soil+ brewery mash + 10 earthworms |
| Table 3: Effect of earthworms’ numbers amended with brewery mash on TPH degradation in crude oil contaminated soil. |
