Lessons Learned Managing Water Chemistry in High Recycle Rate Bottom Ash Transport Systems.pdf

David Donkin, UCC Environmental
Bernie Evans, UCC Environmental

Description

Lessons Learned Managing Water Chemistry in High Recycle Rate Bottom Ash Transport Systems Authors Mr. David Donkin - United States - UCC Environmental Mr. Bernie Evans - United States - UCC Environmental Abstract In March of 2023, the United States Environmental Protection Agency (EPA) affirmed that the Best Available Technology for Bottom Ash (BA) Transport Systems in the coal-fired utilities that are wet systems will be High Recycle Rate systems, with no provisions for untreated water purge to discharge. Ostensibly the EPA has signaled a goal of Zero Liquid Discharge for BA transport systems, which will require the industry to operate these systems as closed loop systems. In any closed loop system, the evolution of the water chemistry, especially with respect to scaling and corrosion tendencies, is of heightened concern. While a large variety of options exist for the treatment and control of these risks, they have only recently been studied and applied to BA transport systems. Current chemical treatment programs and their impact on water quality will be discussed. In addition, capital investment options to allow zero liquid discharge configurations will be reviewed.

 
May 15th, 9:00 AM May 15th, 9:30 AM

Lessons Learned Managing Water Chemistry in High Recycle Rate Bottom Ash Transport Systems.pdf

Grand Rapids, Michigan

Lessons Learned Managing Water Chemistry in High Recycle Rate Bottom Ash Transport Systems Authors Mr. David Donkin - United States - UCC Environmental Mr. Bernie Evans - United States - UCC Environmental Abstract In March of 2023, the United States Environmental Protection Agency (EPA) affirmed that the Best Available Technology for Bottom Ash (BA) Transport Systems in the coal-fired utilities that are wet systems will be High Recycle Rate systems, with no provisions for untreated water purge to discharge. Ostensibly the EPA has signaled a goal of Zero Liquid Discharge for BA transport systems, which will require the industry to operate these systems as closed loop systems. In any closed loop system, the evolution of the water chemistry, especially with respect to scaling and corrosion tendencies, is of heightened concern. While a large variety of options exist for the treatment and control of these risks, they have only recently been studied and applied to BA transport systems. Current chemical treatment programs and their impact on water quality will be discussed. In addition, capital investment options to allow zero liquid discharge configurations will be reviewed.