Spray dryer waste management.

EPRI has conducted a number of studies to provide utilities with cost information on waste management for conventional wet scrubbing. Studies have characterized waste products; developed engineering designs for effective waste handling, disposal, and/or utilization; and estimated waste management costs. A study, completed in late 1986 evaluated spray dryer wastes. On a dollar-per-ton-disposed basis, spray dryer waste management costs were found to be higher than those for either conventional fly ash or scrubber sludge alone. Cost estimates for new and retrofit spray dryer applications must be revised upward from those produced earlier by EPRI.