Method for processing aqueous wastes

Patent · Tue Dec 28 00:00:00 EST 1993

OSTI ID:5263092

Pickett, J B; Martin, H L; Langton, C A; Harley, W W

A method is presented for treating waste water such as that from an industrial processing facility comprising the separation of the waste water into a dilute waste stream and a concentrated waste stream. The concentrated waste stream is treated chemically to enhance precipitation and then allowed to separate into a sludge and a supernate. The supernate is skimmed or filtered from the sludge and blended with the dilute waste stream to form a second dilute waste stream. The sludge remaining is mixed with cementitious material, rinsed to dissolve soluble components, then pressed to remove excess water and dissolved solids before being allowed to cure. The dilute waste stream is also chemically treated to decompose carbonate complexes and metal ions and then mixed with cationic polymer to cause the precipitated solids to flocculate. Filtration of the flocculant removes sufficient solids to allow the waste water to be discharged to the surface of a stream. The filtered material is added to the sludge of the concentrated waste stream. The method is also applicable to the treatment and removal of soluble uranium from aqueous streams, such that the treated stream may be used as a potable water supply. 4 figures.

• DOE Contract Number: AC09-89SR18035
• Assignee: PTO; EDB-94-052603
• Patent Number(s): US 5273661; A
• Application Number: PPN: US 7-839540
• OSTI ID: 5263092
• Resource Relation: Patent File Date: 21 Feb 1992
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
LIQUID WASTES
WASTE PROCESSING
WASTE WATER
INDUSTRIAL WASTES
MATERIALS RECOVERY
TECHNOLOGY ASSESSMENT
HYDROGEN COMPOUNDS
MANAGEMENT
OXYGEN COMPOUNDS
PROCESSING
WASTE MANAGEMENT
WASTES
WATER
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management