Waste treatment process and device thereof
US6053957A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1998 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Jul 24, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S241/38
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention provides a waste treatment process and device thereof which can reduce the size and weight of organic waste by decomposing the waste to powder form and bacteria free substance that may be used as a kind of fertilizer for plants. The waste is first frozen by liquefied nitrogen in a cooling chamber to a temperature less than -200.degree. F., wherein during this freezing procedure, the gas generated from the waste must be removed from the cooling chamber. Then, the frozen nitrogen is immediately transferred to a heated chamber having a temperature of at least 160.degree. F. but not exceed 200.degree. F. During this heating procedure, the water content of the waste is sucked out of the heated chamber, so that the waste is decomposed to form the bacteria free powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.