THREE-PHASE EFFICIENT OXYGEN SUPPLEMENT ARTIFICIAL WETLAND SYSTEM

摘要

Disclosed in the present invention is a three-phase efficient oxygen supplement artificial wetland system, the structure thereof being divided into upper sub-wetland and lower sub-wetland. The upper sub-wetland and lower sub-wetland communicate with each other by means of a communication pipe. A siphon drainage pipe is provided on a side part of the lower sub-wetland. A permanent solid-liquid-gas three-phase region is formed in the upper sub-wetland. A submerged hypoxic zone is formed where the lower sub-wetland is below a water outlet. The lower sub-wetland above the water outlet is in a periodic three-phase region. A good COD, and removal of ammonia nitrogen and total nitrogen can be achieved during wastewater circulation through the entire system. The technical solution comprises: forming an upper sub-wetland and a lower sub-wetland, the upper sub-wetland being provided above the lower sub-wetland, and the lower part of the upper sub-wetland being in communication with the lower sub-wetland by means of communication pipe; and providing a water outlet on the side of the lower sub-wetland to connect to the siphon drainage pipe, the top of the siphon drainage pipe being lower than the top of the lower sub-wetland to form a pressure differential for periodic siphon drainage.