Waste treatment process for removal of contaminants from aqueous, mixed-waste solutions using sequential chemical treatment and crossflow microfiltration, followed by dewatering
- Deep River, CA
- Pembroke, CA
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.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 5366634
- OSTI ID:
- 869612
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
90
achieved
addition
adsorbent
adsorption
aqueous
aqueous waste
benzene
cadmium
calcium
cesium-137
chemical
chemical treatment
chemicals
complexes
conditioning
configurations
containing
contaminant-bearing
contaminants
cross-flow
crossflow
dewatering
discharged
distinct
enlarged
evaporation
exchange
filter
filtrate
followed
impurities
including
insoluble
insoluble metal
iron
lead
low-temperature
materials
meets
metal
metal complex
metal complexes
microfiltration
mixed
mixed waste
mixed-waste
particles
polydisperse
powdered
powdered material
powdered materials
precipitation
pressing
process
processes
produced
produces
quality
recycled
reduced
removal
remove
separation
sequential
size
soluble metal
solution
solutions
solutions containing
sorbent material
sorbent materials
specified
staged
strontium-85
target
treated
treatment
treatment process
trichloroethylene
uranium
variety
volume
waste
waste solution
waste solutions
waste treatment
water
water produced
water-soluble
water-soluble metal