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Constructed Wetland Treatment Systems (CWTSs)

for water treatment of multiple elements, organic compounds, and nutrients

Monique Haakensen, PhD, PBiol, EP

Contango Strategies Ltd

Haakensen, M., Terry, M.W., Castle, J.W., and Rodgers, J.H.

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Core Activities

Passive Water

Treatment

Licensing and Permitting

Biorestoration

Contract Research &

Process Development

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About us

Expertise • Microbiology • Biochemistry • Biogeochemistry • Molecular Processes • Genomics • Toxicology

• Partner with: Engineering, Bioinformatics and others as needed

Facilities • Laboratory • All-season greenhouses • Outdoor pilot facilities • Saskatoon, SK

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CWTS

• Acid mine drainage

• Mine effluent & seepage

• Energy derived produced

or process waters

• Industrial processes

• Cold climate

• Post-closure

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Experience

• CWTS across North America

• Elements, arsenic, cadmium, chromium, cobalt, copper, iron, lead, manganese, mercury, nickel, selenium, sulphur, vanadium and zinc

• Organics and nutrients (ammonia, phosphate, hydrocarbons, other)

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Our approach • Site specific, case-by-case

• Scientific testing and optimization

• Sequester contaminants into the soil or sequentially degrade

• Design to avoid toxic buildup in soil

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How can we be confident in performance? • Scientific Design • Modeling, optimizing • Pilots, demonstration scale (early in operations) • Testing and validation of design

• Water • Sediments • Plants • Toxicology

• Contingency

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Scaling approach

Pilot

Demonstration

Full

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Pilot-scale CWTS

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Develop Explanatory Parameters • Redox (Eh) • Alkalinity • pH • Dissolved Oxygen • Nutrients

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

0 10 20 30

Dis

solv

ed O

xyg

en m

g/L

hrs

trial 1

trial 2

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Design Optimization + Scientific testing = Predictable Treatment

0.0000

0.0050

0.0100

0.0150

0.0200

0.0250

0.0300

mg

/L

Selenium

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

mg

/L

Uranium

0

0.001

0.002

0.003

0.004

0.005

0.006

0.007

0.008

0.009

0.01

mg

/L

Lead

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

mg

/L

Arsenic

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Removal rate coefficients and sizing

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Se U Pb As

As Al Mn

Fe

Sequential treatment

S

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Acclimation and Maturation

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Functioning Properly Non-Functioning

Samples

Diff

eren

t Typ

es o

f Bac

teria

Microbial Community Profiling

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Licensing and Permitting

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Locations of Projects in Canada

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Thank-You

contangostrategies.com info@contangostrategies.com Phone: 306 978 3111