Composite artificial wetland system for treating farmland drainage and treatment method thereof

• Main Authors: XIONG YANWEI, CHANG JUNJUN, DENG SHENGJIONG, ZHANG YANGYUAN, ZHU YAOSONG, HOU ZONGHAO
• Format: Patent
• Language: Chinese; English
• Published: 03.01.2023
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a composite constructed wetland system for treating farmland drainage and a treatment method thereof, and relates to the technical field of constructed wetlands, the composite constructed wetland system comprises a primary filtering grating, a regulating reservoir, a horizontal subsurface flow type constructed wetland system and a horizontal surface flow type constructed wetland system which are sequentially arranged along the water flow direction; wherein the horizontal subsurface flow type constructed wetland system is sequentially provided with a water inlet area, an organic matter filler layer, an iron-carbon filler layer, a gravel filler layer and a water outlet area along the water flow direction; the water inlet area comprises a water inlet solid wall and a water inlet perforated wall; the water outlet area comprises a water outlet solid wall and a water outlet perforated wall; wetland plants are planted in the horizontal subsurface flow type constructed wetland system and the h