Bioslurry reactor for treatment of slurries containing minerals, soils and sludges

Patent · Tue Jul 13 00:00:00 EDT 1993

OSTI ID:6114240

Hanify, D E; Duncan, S P; Emmett, Jr, R C; Brox, G H; O'Connor, L T

Apparatus for use in treating, through use of bacteria, minerals, soils or sludges which have been contaminated with hazardous waste organic compounds, said apparatus is described comprising: slurry-forming means for adding water to said minerals, soils or sludges to form a slurry; screening means, associated with said slurry-forming means, for removing all solid material of a preselected size from said slurry; a container means associated with said screening means for containing a quantity of slurry and bacteria suited to treat hazardous waste organic compounds; an oxygen supply means mounted within said container means, said oxygen supply means including at least one flexible porous membrane diffuser adapted for receiving a supply of oxygen-containing gas and distributing said gas into said container means in a form of fine bubbles; a mixing means mounted within said container means for mixing and recirculating the slurry contained within said container means; an exhaust gas recycling means mounted on said container means for drawing off a quantity of exhaust gases from said container means, treating said exhaust gas by extracting carbon dioxide therefrom, injecting oxygen into said quantity of exhaust gas and thereafter reintroducing said treated exhaust gas into said container means by means of said oxygen supply means, wherein said container means is sealed to prevent escape of exhaust gases; and dewatering means, associated with said container means, for receiving said slurry from said container means and dewatering said slurry.

• Assignee: Envirotech Corp., Menlo Park, CA (United States)
• Patent Number(s): US 5227136; A
• Application Number: PPN: US 7-612585
• OSTI ID: 6114240
• Resource Relation: Patent File Date: 5 Nov 1990
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
BIOREACTORS
DESIGN
ORGANIC COMPOUNDS
BIODEGRADATION
SEWAGE SLUDGE
DECONTAMINATION
SOILS
AEROBIC DIGESTION
BACTERIA
HAZARDOUS MATERIALS
MINERALS
ORGANIC WASTES
REMEDIAL ACTION
SLURRIES
WATER REMOVAL
BIOCONVERSION
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
CHEMICAL REACTIONS
CLEANING
DECOMPOSITION
DIGESTION
DISPERSIONS
MATERIALS
MICROORGANISMS
MIXTURES
REMOVAL
SEWAGE
SLUDGES
SUSPENSIONS
WASTES
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)