This paper presents the results of jield and laboratory studies conducted to evaluate treatment methods for reducing the concentrations of dissolved copper and iron in several spent boiler cleaning solutions. These waste solutions are generated during the cleaning of steam tubes in utility boilers.Cleaning may be accomplished using one of several solutions, including: inhibited hydrochloric acid, ammonium bromate, ethylenediamine tetraacetic acid (EDTA), citrate, and hydroxyacetic-formic acid. The raw wastes were treated by conventional lime and caustic precipitation and b y co-ponding with coal f l y ash. Analytical results were compared with Federal ef$uent discharge guidelines (NPDES) for copper and iron.
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