Use of fly ash in biological process of wastewater treatment systems
US10619300B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Feb 21, 2018 |
| Grant date | Apr 14, 2020 |
| Priority date | — |
| Expiry date | Feb 21, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The spent liquor (SL) of a thermomechanical pulping (TMP) process introduces a high load to the wastewater system of this process. To reduce this load, fly ash from a biomass boiler is used and the application of fly ash improves the performance of biological process. Three different alternatives are introduced to apply fly ash to treat spent liquor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.