Treatment of a leach field
US6726401B1 · kind B1 · utility
20Cited by
16References
9Claims
0Family size
Inventor
Key dates
| Filing date | Jan 17, 2002 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Jun 13, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F1/002
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The performance of a leach field in processing waste water is maintained or improved by a control system in which one or more selected parameter in a waste water conduit, or in the influence zone of the conduit, is measured, compared to a set point(s), and one or more variable is manipulated. For example, gas composition, gas pressure, water level and water content are measured; waste water flow, heating, air flow and air composition are changed. In one mode of operation the manipulated variable is qualitatively different from the parameter being measured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.