Slurry treatment and shipping method
US7101507B1 · kind B1 · utility
Inventor
Key dates
| Filing date | May 27, 1999 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | May 27, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2/04
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Aerobic and anaerobic contamination is removed from a slurry by a sterilizing process and apparatus (10). A slurry piping circuit (26, 28, 30, 32, 34) interconnects a supply tank (12), three serial heat exchangers (16, 18, 20) and a storage tank (14). The circuit and storage tank are sanitized by flushing with mist of hydrogen peroxide (44) and nitrogen (50). One heat exchanger (16) transfers heat from the sterilized slurry to the unsterilized slurry. A closed hot water piping circuit (60, 62, 64) interconnects a hot water boiler (22) and the other two heat exchangers (18, 20). The slurry is sterilized in an insulated manifold (24) interconnecting the other two heat exchangers (18, 20). Slurry is pumped through the piping and heated by hot water in the manifold to kill the bacteria, and is covered by a layer of nitrogen (54) in the storage tank (14). The storage tank may be transported to a distant terminus where it is unloaded and again sterilized, if necessary, or is used immediately in an industrial process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.