Wetland system for treating domestic wastewater and rainwater and application thereof

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.