Stormwater runoff treatment substrate and stormwater bioretention system constructed by using substrate
US11878920B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Aug 27, 2021 |
| Grant date | Jan 23, 2024 |
| Priority date | — |
| Expiry date | Nov 20, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A stormwater runoff treatment substrate includes a lower pyrite substrate layer and an upper biochar substrate layer. The lower pyrite substrate layer includes pyrite, oyster shell powder, and sandy materials in a volume ratio of 10:5:85. The upper biochar substrate layer includes biochar or activated carbon, organic nutrient soil, and sandy materials in a volume ratio of 20:3:77.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.