Method for promoting methane production from sludge by anaerobic digestion in high ammonia-nitrogen habitat using biochar with high C/N ratio
US12421149B2 · kind B2 · utility
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Key dates
| Filing date | Nov 7, 2022 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Jan 12, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention discloses a method for promoting methane production by anaerobic digestion in a high ammonia-nitrogen habitat using a biochar with a high carbon-to-nitrogen (C/N) ratio. In this method, a biochar material prepared by dry distillation and carbonization is added to municipal sludge for medium-temperature anaerobic digestion treatment, which increases the efficiency of methane production from sludge by anaerobic digestion in different ammonia-nitrogen stress habitats, thereby realizing the utilization of sludge as resources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.