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Apex Engineering, PLLC

Biological Nitrate and Sulfate Removal for Kinross Gold
Apex Engineering design for nitrate removal and sulfate removal
As process engineer for this project, Apex Engineering designed and oversaw construction of three biological treatment systems for nitrate and sulfate removal to meet state antidegradation standards.   Flow rates range from 6 to 50 gpm, with nitrate-nitrogen concentrations of 6 to 30 mg/L and sulfate concentrations of 100 to 800 mg/L.   Project responsibilities included column testing, preparation of engineering reports and O&M manuals for state review, meeting with state scientists and engineers, conceptual design and cost estimation, final design and construction oversight, teaming with other consultants on the project, and start-up and operations support. The selected technology combines engineered reactors and in situ biological treatment.
Biological treatment system under construction
Tank 1 for biological nitrate removal
Here's a paper and presentation on this treatment system:
Completed Underdrain treatment system
Key Mine treatment system under construction
Key Mine system in operation