Wet oxidation process concentration of iron and copper steam generator cleaning solvents
- ADTECHS Corp., Herndon, VA (United States)
The use of ethylene diamine tetraacetic acid (EDTA) metal cleaning formulations is broadly based. Usually the form of the EDTA used is the tetra ammonium salt. These formulations were developed by the power industry for specific use in maintaining steam generators. When these powerful cleaning solutions are used, they attract not only the key metals of interest, iron and copper, but also can and do remove small levels of other available metals such as chrome. A reduction in the volume of these cleaners is required in order to meet waste management and disposal standards. This paper deals with one method of volume reduction, concentration through evaporation. Once volume reduced, the waste can then be further treated through the use of Wet Oxidation. The effect of this process on the Total Organic Carbon (TOC) contained in the copper as well as the iron spent cleaning solutions is reviewed, including regression analysis of selected data. A regressive comparison is made between the EDTA and the TOC analyzed in the Wet Oxidation batch residuals.
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (United States); Williams (Paul) and Associates, Medina, OH (United States)
- OSTI ID:
- 229850
- Report Number(s):
- EPRI-TR--105569; CONF-950718--
- Country of Publication:
- United States
- Language:
- English
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