Apparatus and method for monitoring condition of a biomass
US5807699A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1995 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Feb 13, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/1806
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to apparatus (1) for monitoring condition of a biomass, particularly that naturally occurring in activated sewage sludge, comprising a vessel (2) for holding a liquid in the form of the activated sewage sludge containing a biomass (3), a device in the form of an aeration ring (4) for continuously aerating the sludge (3) in use, a hopper (5) and valve V2 arrangement to dose the biomass (3) in the vessel (2) with an additive in the form of an additional dose or charge of a feed solution, and a dissolved oxygen probe (6) to measure the dissolved oxygen content of the sewage in the vessel (2) whereby to monitor the condition of the biomass. Poisoning of the biomass is detected using the probe and associated electronic equipment (FIG. 3), such poisoning being shown by a sudden reduction in the measurement of the current of oxygen used per dose of sewage feed solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.