Nutrient recovery process
US9045355B2 · kind B2 · utility
8Cited by
14References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Mar 15, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/40
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An apparatus for recovering nutrients from digestate comprises one or more solid-liquid separation steps, and dryer, an ammonia stripping device, and an evaporator. In a process, digestate is separated into a solids portion and a liquid portion. Ammonia is stripped from the liquid portion and converted into an ammonium solution or salt which may be used as, or blended with, a fertilizer product. At least part of the remaining liquid portion is concentrated to produce brine. The brine is mixed with the solids portion. The mixture is dried and may be used as, or blended with, a fertilizer product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.