Mountaineer Power Plant Selenium Reduction
American Electric Power is taking measures to reduce selenium in wastewater at its Mountaineer Power Plant. The power plant uses General Electric's (GE) patented Advanced Biological Metals Removal (ABMet) technology, where fixed-film bioreactors treat effluent from the flue gas desulfurization process and ash landfill leachate.
Given the ABMet system was to be built with no interruptions to power plant operations, a substantial amount of design and construction planning was required to successfully integrate into existing processes. As part of a design-build team with Bowen Engineering and GE, we served as the facility engineer that developed the site layout, detailed design of pump stations and piping, structural, HVAC and electrical design.
Tight space limitations led to a single concrete tank that houses the bioreactors and integrates process equipment to optimize space savings. With common walls to an existing building and close proximity to conveyer foundations, it was determined precise excavation plans and extensive geotechnical enhancements were needed prior to construction. A 3-D building information model helped visually explain the complex design approach to all project stakeholders.
Now in operation, the selenium-reducing plant enables the treatment of 600 GPM of wastewater ahead of tightening effluent discharge limits.