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Table 2 Remediation of sites/actual site soils contaminated with pesticides and PCBs in aerobic slurry bioreactors.

From: A review on slurry bioreactors for bioremediation of soils and sediments

Matrix

Contaminant

Remarks

Removal

Ref.

Waste activated sludge

EPTCa (5 – 6 ppm)

a) freely suspended activated sludge

b) immobilized activated sludge

a)35%

b)72%

[109]

Agricultural soil

Clay 56.11%

Silt 23.2%

Sand 20.69%

pH 8.3

Organic carbon 0.6%

γ-HCHb

Inoculated with Pseudomonas putida coexpressing cytocrome P-450 cam and luciferase

65%

[48]

Soil

Clay 13%

Silt 21%

Sand 66%

pH 7.7

Total carbonates 3%

a) PCBsc (1210 mg/kg)

b) TPHd (11407 mg/kg)

Rhamnolipid production was observed by Pseudomonas aeruginosa

a) 98%

b) 99%

[49]

Actual site contaminated soil

PCBsc (1547 mg/kg)

Inoculated with ECO3 co-culture

21% (without inoculum)

39% (with inoculum)

[47]

Actual site contaminated Soil

PCBsc (1547 mg/kg)

Inoculated with ECO3 co-culture; optimization of SR configuration

18% (in shake flasks with baffles)

30% (in stirred thank reactor)

[14]

Actual site contaminated Soil

PCBsc (350 mg/kg)

Inoculated with ECO3 co-culture in the absence and the presence of Cyclodextrins, Quillaya Saponin, Triton X-100

65% (without agents) 80% (with agents)

[46]

Soil

Clay 48%

Silt 41%

Sand 11%

pH 7.0

Organic matter 4%

2,4-De (300 mg/kg)

With and without sucrose

>90%

[30]

Soil

Clay 26%

Silt 48%

Sand 26%

pH 7.2

Organic matter 0.8%

DEPf (8 mg/g)

a) with native soil microflora

b) with effluent treatment plant microflora

a) 47.9%

b) 75.4%

[22]

  1. Notes: aS-ethyl dipropylthiocarbamate; bγ-hexaclhorocyclohexane; cPolychlrorinated byphenyls; dTotal petroleum hydrocarbons; e2,4-dichlorophenoxyacetic acid; fdi-ethyl phthalate