PASSIVE WATER TREATMENT
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:
Design, optimization, and testing
Integration with existing treatment systems
Mine closure planning
Permitting and licensing
Implementation and operation
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.
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
WHAT CAN BE PASSIVELY TREATED IN WATER?
Ammonia, nitrate, nitrite
Biological oxygen demand
Cyanide and related compounds
Metals and metalloids
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.
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.
Biochemical reactors (BCR)
In situ mine pool treatment
Pit lake treatment
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.
Technology Selection & Conceptual Design
Identify necessary biogeochemical treatment pathways and applicable technologies
Theoretical design and modeling
Develop proof of concept
Assess feasibility based on natural treatment potential
Develop goals and identify site-specific considerations
Demonstration-scale Confirmation & Optimization
Refine removal rates and conditions
Stress testing and development of recovery actions
Bench & Pilot-scale Testing
Controlled environment (off site)
Develop kinetics and sizing
Refine and optimize designs
Evaluate failure and recovery mechanisms
Construction, commissioning, and monitoring