Two zone process for biological treatment of waste water

Patent · Tue Mar 11 04:00:00 EST 1980

OSTI ID:5774209

Hornsey, D; Lee, R G; Savard, G

A process is provided for treating waste water biologically and clarifying the biologically treated water. Considerable economic advantage is obtained by conducting both the biological treatment and the clarification of biologically treated water in a single vessel rather than in separate vessels. It is further found possible to treat in this system water containing much higher concentration of waste; in the process the supply of oxygen to the biological reaction zone is carefully monitored to meet the biological oxygen demand and avoid the occurrence of undissolved oxygen in the form of gas bubbles in the biological reaction zone or the clarification zone. There is further provided improvements in oxygen dissolving devices rendering them especially suitable for the two zone treatment.

• Assignee: Canadian Liquid Air Ltd (Canada)
• Patent Number(s): US 4192740
• OSTI ID: 5774209
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320603* -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Public Utilities-- (1980-)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
BIOCHEMICAL OXYGEN DEMAND
BIODEGRADATION
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
ENRICHMENT
EQUIPMENT
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
MONITORING
NONMETALS
OXYGEN
OXYGEN COMPOUNDS
OXYGEN ENRICHMENT
PROCESSING
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER TREATMENT
WATER TREATMENT PLANTS