Apparatus for treating industrial and domestic waste waters
US3956128A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 12, 1975 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Mar 12, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/72
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A system for treating waste waters including a pair of concentric tanks forming a space therebetween which serves as an aeration chamber. Untreated but screened waste water is discharged into the (annular) space and withdrawn therefrom by a pump which passes the liquid through an oxygenating device which induces air into the liquid. The liquid is then circulated through long tubing wound around the outside peripheral surface of the tank to obtain intimate contact between the gas, liquid and solids therein and to convert dissolved material into insoluble material by a conventional biochemical process. The liquid thus processed in the tubing is introduced into the central or inner tank where the treated solids rise to the surface for recycling in the system while the liquid effluent is filtered and discharged to a river or stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.