PASSIVE WATER TREATMENT

SPECIALISTS

We are experts in passive and semi-passive biotreatment of waters impacted by mining and oil and gas projects, including operating, closed, and abandoned sites.

Our specialties in passive water treatment include:

  • Feasibility assessment
  • Design, optimization, and testing
  • Integration with existing treatment systems
  • Mine closure planning
  • Permitting and licensing
  • Implementation and operation

OUR FACILITIES

Contango’s temperature-controlled pilot facilities allow for testing and optimization of site-specific passive water treatment for a wide range of climates. Specialists in mining operations and closure water treatment, our in-house microbiology and biogeochemistry laboratories give us insight into how to optimize treatment processes. This results in a more efficient and robust system, and identifies implementation timelines, potential failure scenarios, and recovery modes.

OUR CLIENTS

We work worldwide, with extensive experience in extreme environments, from the Yukon to Kyrgyzstan. Click here to see a map of project locations in Canada. Example water treatment applications:

  • Acid Rock Drainage
  • Closure Planning and Legacy Sites
  • Oil and Gas
  • Oil Sands
  • Mining


WHAT CAN BE PASSIVELY TREATED IN WATER?

  • Acidity
  • Ammonia, nitrate, nitrite
  • Biological oxygen demand
  • Chlorinated compounds
  • Cyanide and related compounds
  • Hydrocarbons
  • Metals and metalloids
  • Nutrients
  • Sulphate


DID YOU KNOW?

Contango is the only Passive Water Treatment and Remediation service provider with facilities, technology, and expertise to perform and interpret microbial community profiling (genetic and metabolic) to thoroughly understand the bioremediation processes at work and how to optimize them for your benefit.

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HOW IS WATER TREATED?

Natural biogeochemical, geochemical, and physical processes are used to treat water in a series of steps. Each step of the treatment system is designed to address a specific aspect of the water, ensuring effective and robust treatment and flexibility for optimization. Some passive treatment systems can also be designed to become self-sustaining, with plant decay providing renewed binding sites and food for the microbes that are continuously working to treat the water.

Example technologies:

  • Treatment wetlands
  • Bioreactors
  • In situ mine pool treatment
  • Pit lake treatment

APPROACH

To be effective, robust, and predictable, passive water treatment systems must be developed using a science and evidence-based approach, to target the desired treatment processes. A phased approach allows for implementation in a cost-effective manner, while providing information necessary for regulatory processes and permitting. While some projects benefit from all five steps, others can be implemented with two or three.

Phase 2
Technology Selection & Conceptual Design

  • Identify necessary biogeochemical treatment pathways and applicable technologies
  • Theoretical design and modeling
  • Develop proof of concept

Phase 1
Information Gathering

  • Assess feasibility based on natural treatment potential
  • Develop goals and identify site-specific considerations

Phase 4
Demonstration-scale Confirmation & Optimization

  • On-site optimization
  • Refine removal rates and conditions
  • Stress testing and development of recovery actions

Phase 3
Bench & Pilot-scale Testing

  • Controlled environment (off site)
  • Develop kinetics and sizing
  • Refine and optimize designs
  • Evaluate failure and recovery mechanisms

Phase 5
Full-scale Implementation

  • Construction, commissioning, and monitoring

FOR PRINTABLE INFORMATION ON OUR PASSIVE AND SEMI-PASSIVE WATER TREATMENT SERVICES FOR MINING, CLICK HERE FOR A PDF.
SPECIFIC EXAMPLES AND CASE STUDIES ARE AVAILABLE BY REQUEST.