Beneficiated, heat-dried biosolid pellets
US8192519B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2010 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Aug 7, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A40/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention is directed to systems, devices and methods for modifying the process of producing dried biosolids pellets or granules into beneficiated inorganically-augmented bioorganic fertilizer. The present invention describes a method to beneficiate heat-dried biosolids or sludge pellets or granules as presently manufactured by municipalities or companies from a) dewatered municipal wastewater biosolids or sludges within the municipal wastewater treatment plant heat-dried biosolids production facility or from b) finished dry heat dried biosolids pellets or granules in a separate manufacturing facility from the municipal wastewater treatment plant to produce a fertilizer containing sufficient organic and inorganic plant nutrients to be valuable and saleable into the commercial agricultural industry. The present invention describes beneficiation methods to increase the plant nutrient content to a level which permits the finished beneficiated dried biosolids pellet or granule product to compete in the commercial agricultural fertilizer marketplace and also to reduce the odors associated with traditionally-produced heat dried biosolids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.