Method and apparatus for anaerobic digestion of organic liquid waste streams
US8470177B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 27, 2006 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Dec 25, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/20
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
A system and method for treating high-strength organic liquid waste. Generally, the method includes feeding influent high-strength organic liquid waste including organic molecules to an anaerobic digester, converting at least a portion of the organic molecules in the liquid waste to acids using acid forming bacteria, converting at least a portion of the acids in the liquid waste to methane using methanogenic bacteria, separating the liquid waste after treatment with the methanogenic bacteria into alkaline sludge and effluent, and using the alkaline sludge to adjust the pH of the liquid waste in the anaerobic digester. In the case of acidic high-strength organic liquid wastes, a portion of the acids produced by the acid forming bacteria may be recirculated to the front of the anaerobic digester and combined with influent high-strength organic liquid waste.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.