Variable-load anti-blocking water-quality purification system for constructed wetlands

The invention discloses a variable-load anti-blocking water-quality purification system for constructed wetlands, and belongs to the field of watery environment wetland restoration. According to the system, blocking can be prevented, and strengthening and purification also can be achieved; by coupling a suspended filler layer and a micro-aeration device, the purification ability of a water body inthe wetlands and anti-blocking performance of the system are improved, and the system can be used for purifying polluted water bodies with different loads. The purification system sequentially comprises fluidized filler layers, fixed filler layers and aeration pipes from top to bottom, wherein the tank depth of each purification system is 1.5 to 2m; the thicknesses of each fluidized filler layerand each fixed filler layer are both 0.6 to 0.8m; a water inflow area is arranged below the fixed filler layers; the aeration pipes are arranged in the water inflow area; gaps of 0.2 to 0.3m are reserved under the aeration pip