Scouting treatability studies performed in support of the nonradiological wastewater treatment facility feasibility study
A developmental program was undertaken to partially investigate the flowsheet being considered for the treatment of nonradiological wastewater produced by the Oak Ridge National Laboratory. The proposed flowsheet contains the following unit operations: equalization, carbon adsorption, ozonation, biodenitrification, biooxidation, filtration, reverse osmosis, and ion exchange. This report details an initial scouting program in which granular activated carbon (GAC) adsorption and reverse osmosis (RO) were operated on two of the waste streams that will be treated in the nonradiological waste treatment (NRWT) facility (190 pond influent and Building 3544 effluent). The GAC system was operated on both the 190 pond influent and the 3544 effluent, using Filtrasorb-300 activated carbon. Mercury removal was measured to be greater than 94% at an inlet concentration of 0.02 to 0.04 mg/L of mercury. Total organic carbon (TOC) removal was 40 to 70%, with inlet values of 4.6 to 5.3 mg/L of TOC. The removal of TDS, nitrate, sulfate, and mercury from the 3544 effluent was examined by RO with a cellulose acetate membrane (Osmonics) and a thin film composite membrane (FilmTec). The Osmonics membrane was operated in the feed recovery range of 64 to 95%. The corresponding rejection values were: 66 to 22.5% for nitrate, 74 to 45% for TDS, and 92 to 85% for sulfate. Mercury was not rejected at any recovery. The FilmTec membrane was operated at between 60 and 94% recovery. The corresponding rejection values were: 95.5 to 68.4% for nitrate, 95.4 to 84.5% for TDS, and 54.9 to 33% for mercury. Sulfate rejection was greater than 98.5% in all cases. Both membranes rejected more mercury upon the addition of sulfide to the feed stream, probably due to the formation of colloidal mercury sulfide. Both membranes were found to concentrate radioactive species. 12 figs., 10 tabs.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5820316
- Report Number(s):
- ORNL/TM-9667; ON: DE86010086
- Country of Publication:
- United States
- Language:
- English
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CESIUM 134
RADIOMETRIC ANALYSIS
CESIUM 137
COBALT 60
MERCURY
REMOVAL
NITRATES
ORGANIC COMPOUNDS
STRONTIUM 90
WATER TREATMENT PLANTS
FEASIBILITY STUDIES
OPERATION
RADIOCHEMICAL ANALYSIS
WASTE WATER
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CESIUM ISOTOPES
CHEMICAL ANALYSIS
COBALT ISOTOPES
ELEMENTS
EVEN-EVEN NUCLEI
HOURS LIVING RADIOISOTOPES
HYDROGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LIQUID WASTES
METALS
MINUTES LIVING RADIOISOTOPES
NITROGEN COMPOUNDS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
RADIOISOTOPES
STRONTIUM ISOTOPES
WASTES
WATER
YEARS LIVING RADIOISOTOPES
520301* - Environment
Aquatic- Radioactive Materials Monitoring & Transport- Water- (1987)