Nitrogen and phosphorus removal from wastewater
Patent
·
OSTI ID:6492016
Wastewater is passed sequentially through an anaerobic treating zone and an oxic treating zone, followed by separation from the treated liquor of a dense sludge containing activated biomass, at least part of which is recycled to provide the activated biomass employed in treating the influent wastewater. Of the part of the sludge so recycled a minor portion is introduced into the anaerobic treating zone for admixture with the wastewater influent and the remaining major portion is introduced into the oxic treating zone, into which oxic zone oxygen-containing gas is admitted to effect oxygenation of the contents of that zone.
- Assignee:
- Air Products and Chemicals, Inc.
- Patent Number(s):
- US 4522722
- OSTI ID:
- 6492016
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320604* -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Municipal Waste Management-- (1980-)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ANAEROBIC DIGESTION
BIOCONVERSION
BIOMASS
CHEMICAL ACTIVATION
CHEMICAL REACTIONS
DENITRATION
DIGESTION
ELEMENTS
ENERGY SOURCES
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
MIXING
NITROGEN
NONMETALS
OXYGEN COMPOUNDS
PHOSPHORUS
PROCESSING
RECYCLING
REMOVAL
RENEWABLE ENERGY SOURCES
SEPARATION PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER TREATMENT
320604* -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Municipal Waste Management-- (1980-)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ANAEROBIC DIGESTION
BIOCONVERSION
BIOMASS
CHEMICAL ACTIVATION
CHEMICAL REACTIONS
DENITRATION
DIGESTION
ELEMENTS
ENERGY SOURCES
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
MIXING
NITROGEN
NONMETALS
OXYGEN COMPOUNDS
PHOSPHORUS
PROCESSING
RECYCLING
REMOVAL
RENEWABLE ENERGY SOURCES
SEPARATION PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER TREATMENT