RESULTS OF AN INVESTIGATION ON THE REMOVAL OF A RADIOACTIVE ISOTOPE (I$sup 131$) FROM SEWAGE BY THE USE OF LABORATORY TRICKLING FILTERS
A literature survey was conducted to gain background informatlon on trickling filter theory and operation and on employlng biological treatment to problems in radioactive waste disposal. Four laboratory trickling filter columns were operated at three dosage rates, all in the standard or low rate range, to determine their operatlonal characteristics and to facilitate comparison with similar filters used for ordinary sewage treatment. Due to its widespread usage in the sanitary engineering field, the biochemical oxygen demand (B.O.D.) test was used as the criterion for filter operation. Settled sewage, spiked with known amounts of radioactive iodine (I/sup 131/), was passed through the filter columns and the removal of activity determined at any one of six sampling points located at various filter depths. This arrangement provided data for the correlation of filter depth, dosage rate, and removal of activity. The results of 34 runs utilizing B.O.D. data are presented as well as the resuits of 15 runs employing radioactive sewage as a test material. The data indicated that the filters were operating normally with respect to B.O.D. removal and that I/sup 131/ may be removed from certain contaminated wastes by treatment with trickling filters. When using a concentration of 1,000 counts per minute per milliliter (c/ m/ml) of carrier free I/sup 131/ removals of I/sup 131/ in excess of 85% were obtained at a dosage rate of two million gallons per acre per day (mgad). (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- NSA Number:
- NSA-16-011345
- OSTI ID:
- 4807879
- Report Number(s):
- TID-14867
- Resource Relation:
- Other Information: Thesis submitted to Georgia Inst. of Tech. Orig. Receipt Date: 31-DEC-62
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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