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

Claim 0:
1. A stormwater bioretention system comprising a cell body, wherein a gravel drainage layer, a transition layer, a pyrite substrate layer, a biochar substrate layer, a woodchip protective layer, a ponding zone, a perforated water collection pipe, a raised water outlet pipe, and an overflow pipe, wherein: the gravel drainage layer is disposed at a bottom of the cell body; the transition layer is disposed above the gravel drainage; the pyrite substrate layer is disposed above the transition layer, and wherein the pyrite substrate layer comprises a mixture of pyrite, oyster shell powder, and a first quartz sand in a volume ratio of 10:5:85; the biochar substrate layer is disposed above the pyrite substrate layer, and wherein the biochar substrate layer comprises a mixture of biochar, organic nutrient soil, and a second quartz sand in a volume ratio of 20:3:77; the woodchip protective layer is disposed above the biochar substrate layer; the ponding zone is disposed above the woodchip protective layer; the perforated water collection pipe is disposed in the gravel drainage layer, and the perforated water collection pipe is connected to the raised water outlet pipe; a height of the raised water outlet pipe is equal to a height of a top of the pyrite substrate layer, and an the overflow pipe is disposed at a top opening of the cell body.