Patent ID: 11878920
Assignee: CHONGQING UNIVERSITY
Field: Environmental technology (Chemistry)
Classification: CPC C  E  Y | IPC C  E

Claim 4:
5. The stormwater bioretention system of claim 1, wherein the biochar substrate layer comprises the mixture of 20 vol. % of the biochar, 3 vol. % of the organic nutrient soil, 3 vol. % of 5-10 mesh of the second quartz sand, 7 vol. % of 10-20 mesh of the second quartz sand, 40 vol. % of 20-35 mesh of the second quartz sand, 17 vol. % of 30-60 mesh of the second quartz sand, and 10 vol. % of 60-120 mesh of the second quartz sand.