Method and apparatus for treating household waste water
US4824572A · kind A · utility
Inventor
Key dates
| Filing date | Apr 1, 1988 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Apr 1, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A waste water treatment facility includes a gravity flow treatment bed which receives waste effluent from a plurality of individual septic tanks. The treatment bed includes a bottom layer of small gravel particles, a layer of larger gravel particles covering the bottom layer, a strip of crushed limestone, a layer of straw or hay on the large gravel layer, and a layer of topsoil in which reeds are planted for treating the effluent. A perforated header pipe distributes the incoming effluent across the bed, and a perforated collection pipe collects the treated effluent and delivers it to a sump. The effluent passes from the sump through a chlorinator and a chlorine contact chamber before being discharged to the ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.