Waste treatment process for removal of contaminants from aqueous, mixed-waste solutions using sequential chemical treatment and crossflow microfiltration, followed by dewatering
Abstract
In processes of this invention aqueous waste solutions containing a variety of mixed waste contaminants are treated to remove the contaminants by a sequential addition of chemicals and adsorption/ion exchange powdered materials to remove the contaminants including lead, cadmium, uranium, cesium-137, strontium-85/90, trichloroethylene and benzene, and impurities including iron and calcium. Staged conditioning of the waste solution produces a polydisperse system of size enlarged complexes of the contaminants in three distinct configurations: water-soluble metal complexes, insoluble metal precipitation complexes, and contaminant-bearing particles of ion exchange and adsorbent materials. The volume of the waste is reduced by separation of the polydisperse system by cross-flow microfiltration, followed by low-temperature evaporation and/or filter pressing. The water produced as filtrate is discharged if it meets a specified target water quality, or else the filtrate is recycled until the target is achieved. 1 fig.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 6898167
- Patent Number(s):
- 5366634
- Application Number:
- PPN: US 7-935328
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 26 Aug 1992
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; BENZENE; REMOVAL; CADMIUM; CALCIUM; CESIUM; CHLORINATED ALIPHATIC HYDROCARBONS; IRON; LEAD; STRONTIUM; URANIUM; WASTE WATER; RADIOACTIVE WASTE PROCESSING; WATER TREATMENT; SEPARATION PROCESSES; ACTINIDES; ALKALI METALS; ALKALINE EARTH METALS; AROMATICS; ELEMENTS; HALOGENATED ALIPHATIC HYDROCARBONS; HYDROCARBONS; HYDROGEN COMPOUNDS; LIQUID WASTES; MANAGEMENT; METALS; ORGANIC CHLORINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; OXYGEN COMPOUNDS; PROCESSING; RADIOACTIVE WASTE MANAGEMENT; TRANSITION ELEMENTS; WASTE MANAGEMENT; WASTE PROCESSING; WASTES; WATER; 052001* - Nuclear Fuels- Waste Processing; 540220 - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-); 540230 - Environment, Terrestrial- Radioactive Materials Monitoring & Transport- (1990-)
Citation Formats
Vijayan, S, Wong, C F, and Buckley, L P. Waste treatment process for removal of contaminants from aqueous, mixed-waste solutions using sequential chemical treatment and crossflow microfiltration, followed by dewatering. United States: N. p., 1994.
Web.
Vijayan, S, Wong, C F, & Buckley, L P. Waste treatment process for removal of contaminants from aqueous, mixed-waste solutions using sequential chemical treatment and crossflow microfiltration, followed by dewatering. United States.
Vijayan, S, Wong, C F, and Buckley, L P. Tue .
"Waste treatment process for removal of contaminants from aqueous, mixed-waste solutions using sequential chemical treatment and crossflow microfiltration, followed by dewatering". United States.
@article{osti_6898167,
title = {Waste treatment process for removal of contaminants from aqueous, mixed-waste solutions using sequential chemical treatment and crossflow microfiltration, followed by dewatering},
author = {Vijayan, S and Wong, C F and Buckley, L P},
abstractNote = {In processes of this invention aqueous waste solutions containing a variety of mixed waste contaminants are treated to remove the contaminants by a sequential addition of chemicals and adsorption/ion exchange powdered materials to remove the contaminants including lead, cadmium, uranium, cesium-137, strontium-85/90, trichloroethylene and benzene, and impurities including iron and calcium. Staged conditioning of the waste solution produces a polydisperse system of size enlarged complexes of the contaminants in three distinct configurations: water-soluble metal complexes, insoluble metal precipitation complexes, and contaminant-bearing particles of ion exchange and adsorbent materials. The volume of the waste is reduced by separation of the polydisperse system by cross-flow microfiltration, followed by low-temperature evaporation and/or filter pressing. The water produced as filtrate is discharged if it meets a specified target water quality, or else the filtrate is recycled until the target is achieved. 1 fig.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 22 00:00:00 EST 1994},
month = {Tue Nov 22 00:00:00 EST 1994}
}