Hydraulic Confinement and In-Situ Bioremediation of a Steel Industrial Area

Cristina SalvadorGeologist

Andréia YoshinariGeologist

Afrânio PessoaChemical Engineering

Member of the

ECOGEO Group

Environmental Consulting

and Engineering

Location and Site History

Location and Site History

Site Assessment

(Hydrogeological Aspects)

Site Assessment

(Soil Quality)

Site Assessment

(Groundwater Quality)

MWs: 79

MMWs: 5

MWs: 79

MMWs: 5

Site Assessment

(Benzene)

Site Assessment

(Ethylbenzene)

Site Assessment

(Naphtalene)

Transport Model Without Action

(Benzene)

Hydraulic Barrier

Remediation Concept

Source ReductionDegradation

PT 04PT 05

PB 01

PT-

04

PT-

05

PMN-02

PO-02

PO-01

Pumping Test Area

PB-01

Pumping Test Area

Rua 1

Pumping Test

(Location)

Pumping Test

(UV Photo-Oxidation Unit)

Pumping Test

(Results)

Radius of Influence of 10 metres

Hydraulic Barrier with 6 Pumping Wells

Flow Rate from 15 to 20 m3 per hour

Biological Potential Test

(Samples)

PM-37 (Upstream)

PM-35, PT-05 e PM-44 (Centre)

PM-48 (Downstream)

PM-37 (Upstream)

PM-35, PT-05 e PM-44 (Centre)

PM-48 (Downstream)

Biological Potential Test

(Results)

Biological Potential Test

(Conclusions)

Area has biological potential for degrading main

contaminants (except PT-05)

Groundwater situation is reductive in centre and

downstream areas

Adjustments in C:N:P are needed to promote biological

degradation

Microcosm Degradation Test

(Sample)

Microcosm Degradation Test

(Laboratory)

Microcosm Degradation Test

(Results)

Microcosm Degradation Test

(Conclusions)

Degradation test show a very effective turnover

99,9% degraded in less than 14 days

Degradation in test series is correlated with the increase of

degrading bacterias

Abiotic degradation effects took place in the control series

only in the first 14 days of operation

12 m

³/day

Nutrient Dispersion Model20 wells20 wells

24 m

³/day

6 months 12 months

12 m

³/day

10 wells10 wells

24 m

³/day

6 months 12 months

Nutrient Dispersion Model

10 wells10 wells

6 m

³/day

6 months 12 months

8 + 3 wells8 + 3 wells6 months 12 months

6 m

³/day

Hydraulic Barrier System

(Flowchart)

Aerobic Bioremediation System

(Flowchart)

2 y

ears

4 y

ears

1 y

ear

Scenarios for

RemediationWithout Action With Action (HB) With Action (HB + BIO)

Acknowledgements

Client

Public Authorities

Geoklock Staff