Case Study - Alternatives for Compliance with ELG Rule at Midwest Utility

摘要

This paper will present the various FGD wastewater treatment alternatives considered for compliance with the ELG rule at a large Midwest utility. FGD wastewater treatment alternatives evaluated included physical / chemical / biological treatment, air preheater bypass evaporator, iron adsorption, gas fired spray dryer, thermal evaporation, evaporation ponds, and SBS injection. The paper will discuss the advantages and disadvantages of each alternative. Capital and operating cost data will be provided along with implementation schedules. Burns & McDonnell was hired to conduct an evaluation of technical alternatives of FGD wastewater treatment for compliance with the ELG rule at a medium sized, coal fired, utility plant. This paper documents the various technologies that were considered as part of that study.