DESIGN ECONOMICS EQUIPMENT ENVIRONMENTAL POWER REUSE WASTEWATER

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Abstract

Coal-fired power plants generate a variety of waste streams through the process of generating electricity. Despite improvements in air quality discharges, regulatory agencies in the Ohio River Valley in the United States are reducing the allowable limits for dissolved constituent for wastewater discharges from power plants. A primary focus of the permit limit reductions are dissolved trace metal constituents such as selenium and mercury. These regulatory limit changes are causing power producers to treat their process discharge streams sufficiently to meet the limits established by the plant-specific National Pollution Discharge Elimination System (NPDES) discharge permits. The business challenge to address these limit reductions is the mandated implementation time frames, which can be short relative to the time needed to evaluate, select, design, procure, construct, and commission treatment systems. Managing the scope and cost of the treatment solution is a constant challenge for power producers while they maintain reliable electrical service.

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