Apparatus for biological treatment of waste water
An apparatus 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 concentrations 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 4246111
- OSTI ID:
- 6177530
- Resource Relation:
- Patent File Date: Filed date 7 Nov 1979; Other Information: PAT-APPL-092176
- Country of Publication:
- United States
- Language:
- English
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