US 12,252,426 B2
Wetland system for treating domestic wastewater and rainwater and application thereof
Jianhui Liu, Sichuan (CN); and Li Luo, Sichuan (CN)
Assigned to CHINA MCC5 GROUP CORP. LTD, Sichuan (CN)
Filed by CHINA MCC5 GROUP CORP.LTD, Sichuan (CN)
Filed on Apr. 26, 2022, as Appl. No. 17/730,078.
Claims priority of application No. 202110712871.6 (CN), filed on Jun. 25, 2021.
Prior Publication US 2022/0411303 A1, Dec. 29, 2022
Int. Cl. C02F 9/00 (2023.01); B01D 29/44 (2006.01); C02F 1/00 (2023.01); C02F 1/32 (2023.01); C02F 1/74 (2023.01); C02F 3/06 (2023.01); C02F 3/10 (2023.01); C02F 3/12 (2023.01); C02F 3/28 (2023.01); C02F 3/32 (2023.01); C02F 11/12 (2019.01); C02F 3/02 (2023.01); C02F 101/30 (2006.01); C02F 103/00 (2006.01)
CPC C02F 9/00 (2013.01) [B01D 29/445 (2013.01); C02F 1/001 (2013.01); C02F 1/32 (2013.01); C02F 1/74 (2013.01); C02F 3/02 (2013.01); C02F 3/06 (2013.01); C02F 3/101 (2013.01); C02F 3/1268 (2013.01); C02F 3/28 (2013.01); C02F 3/32 (2013.01); C02F 3/327 (2013.01); C02F 11/12 (2013.01); C02F 2101/30 (2013.01); C02F 2103/001 (2013.01); C02F 2303/04 (2013.01); C02F 2303/16 (2013.01); Y02W 10/10 (2015.05)] 8 Claims
OG exemplary drawing
 
1. A wetland system for treating domestic wastewater and rainwater, comprising a wetland structure and a wastewater treatment device,
wherein the wetland structure comprises a plurality of planting areas, each planting area is surrounded by hoardings and comprises a plurality of planting frames arranged in the hoardings, each planting frame comprises a growing substrate provided therein and wetland plants growing in the growing substrate,
the wastewater treatment device comprises a bar screen, a regulating tank, a hydrolysis acidification tank, a contact oxidation tank, an MBR membrane tank, and a clean water tank that are in communication with each other in sequence along a direction of waterflow and arranged underground, the bar screen is provided with a plurality of bars therein, a lift pump is disposed between and connected to the regulating tank and the hydrolysis acidification tank, a drainage pump is disposed between and connected to the MBR membrane tank and the clean water tank, each planting area is connected to the bar screen, and the clean water tank is connected to the planting area, and
each planting frame has first two opposite sides and second two opposite sides connected to form an enclosure, each of the first two opposite sides is provided with a protrusion, each of the second two opposite sides is provided with a groove, and every two adjacent planting frames are integrated with each other through matching of a corresponding protrusion and a corresponding groove, and the hoardings are provided with grooves fitted with adjacent planting frames via the corresponding protrusions.