Heat treating excreta and products thereof
US3962044A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1974 |
| Grant date | Jun 8, 1976 |
| Priority date | — |
| Expiry date | Jun 17, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/74
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Solid animal excreta, such as solid livestock excreta, solid human excreta and solid poultry excreta, is converted to useful products by particulating the excreta and heat treating it in a closed heating zone at about 200.degree.C to about 1000.degree.C for a time sufficient to volatilize a portion thereof and provide the solid residue with a carbon content of about 1% to about 80 weight percent. The volatilized portion can be withdrawn from the heating zone and separately recovered by condensing the condensibles. This consists of an aqueous and a non-aqueous portion. The non-aqueous portion of the condensate is oleaginous in the form of an oil, grease or wax containing nitrogenous substances and is useful for a variety of purposes. The aqueous portion is rich in nitrogen and is useful as a fertilizer. The solid particulate residue can be employed as a foaming agent or filler for glass products and as a coloring agent or pigment in inks, paints and rubber products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.