Method and apparatus for treating organic wastewater

Patent · Tue Nov 15 04:00:00 EST 1983

OSTI ID:5220202

Heil, R W; Rose, T A

A method and apparatus are disclosed for treating a continuous stream of organic wastewater using highly concentrated activated sludge (10,000 mg/1 MLSS), elevated atmospheric pressure, and high levels of dissolved oxygen. The apparatus consists of three pressurized vessels linked in series by piping, and maintained at equal pressure by means of a common manifold. The first vessel receives the mixed liquor consisting of macerated sewage and return activated sludge and thoroughly aerates it with diffused air bubbles. The liquor then flows by gravity into the second pressurized vessel where flocculation and further aeration occur. From an overflow/transfer box in vessel 2, the liquor flows by gravity into the bottom tier of the third vessel which functions as a cyclone separator. The concentrate is drawn from the bottom of the vessel by a return sludge pump and recycled to the first vessel. The centrate rises into the upper tier of the third vessel where it is clarified and discharged as tertiary quality effluent.

• Assignee: EDB-84-050261
• Patent Number(s): US 4415452
• OSTI ID: 5220202
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320604* -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Municipal Waste Management-- (1980-)
ACTIVATED SLUDGE PROCESS
AERATION
CONCENTRATORS
CYCLONE SEPARATORS
ELEMENTS
EQUIPMENT
FLOCCULATION
HYDROGEN COMPOUNDS
INERTIAL SEPARATORS
LIQUID WASTES
MANAGEMENT
NONMETALS
OXYGEN
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
PRECIPITATION
PROCESSING
RECYCLING
SEPARATION EQUIPMENT
SEPARATION PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER