Water and wastewater treatment system

Patent · Tue Aug 31 00:00:00 EDT 1993

OSTI ID:5954542

Wang, L K; Kurylko, L; Wang, M H.S.

An apparatus is described for dissolving a plurality of gases into a recycled liquid stream by pressurization, releasing the pressurized recycled liquid stream, generating micro gas bubbles in a depressurized liquid stream, concentrating microorganisms as a floating scum on the surface of the depressurized liquid stream, recycling a portion of the concentrated microorganisms in the floating scum to an influent liquid stream for treating the influent liquid stream, and discharging a clarified effluent liquid stream comprising: (a) an influent pipe apparatus and a liquid flow measuring apparatus connected to the influent pipe apparatus for measuring the flow of an influent liquid stream; (b) a pretreatment chamber apparatus directly or indirectly connected to the influent pipe apparatus comprising feeder apparatus for feeding chemicals and/or microorganisms into the influent liquid stream; (c) a bioreactor; (d) apparatus for delivering at least one gas comprises a bubbles distribution apparatus positioned near bottom of the bioreactor apparatus for generating coarse gas bubbles with diameter greater than 80 microns; (e) apparatus positioned inside the bioreactor for holding microorganisms; (f) apparatus connected to the bioreactor for discharging the bioreactor effluent liquid stream; (g) apparatus connected to the bioreactor for receiving the recycled floating scum or settled sludges or both containing microorganisms; (h) an inlet pipe connected to a nozzle assembly; a gas injector connected to the inlet pipe, and a pump connected to the inlet pipe; (i) an enclosed cylindrical pressure vessel having a tangentially disposed liquid stream vessel inlet connected to the inlet pipe and pump; (k) the open vessel connected directly or indirectly to the bioreactor; (l) sludge removal apparatus; (m) post-treatment apparatus; and (n) a third discharge apparatus.

• Assignee: International Environmental Systems, Inc., USA, Latham, NY (United States)
• Patent Number(s): US 5240600; A
• Application Number: PPN: US 7-891826
• OSTI ID: 5954542
• Resource Relation: Patent File Date: 1 Jun 1992
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
LIQUID WASTES
BIODEGRADATION
WASTE PROCESSING PLANTS
DESIGN
WASTE WATER
WASTE PROCESSING
WATER TREATMENT PLANTS
BIOREACTORS
MICROORGANISMS
WATER POLLUTION CONTROL
WATER QUALITY
CHEMICAL REACTIONS
CONTROL
DECOMPOSITION
ENVIRONMENTAL QUALITY
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
MANAGEMENT
OXYGEN COMPOUNDS
POLLUTION CONTROL
PROCESSING
WASTE MANAGEMENT
WASTES
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
560300 - Chemicals Metabolism & Toxicology