Study On Water Purification Method Of Constructed Wetland

Artificial wetland compared with the traditional sewage treatment plant has a large capacity of the buffer,good landscape effect,simple process,saving investment,operating cost low characteristic,very suitable for sewage plant effluent water quality purification,is an important technological measures to protect river water quality.The key to the efficiency of water purification is the selection of process and the selection and application of plants.Research on coastal saline soil,how to select and match the suitable wetland plant,get better purification effect,to solve the binhai area using artificial wetland to purify the water quality is of great significance.At present,although many designers at home and abroad have carried out creative practice and beneficial exploration to create artificial wetland landscape,there are few researches on the effect of winter operation in the northern region.This paper studies the artificial wetland in the airport economic zone and studies the selection and configuration of water-resistant and water-resistant plants.In this paper,the water quality characteristics and soil salinity of the water from the port sewage treatment plant were studied,and the efficiency of the winter removal efficiency of submerged wetland and table flow wetland was studied.Process design chose the undercurrent table flow plus three units alternate process of purification,adopt the salt-tolerant plants native plant reeds,flat stalk Biao grass,and the landscape effect good cattail,scirpus tabernaemontani,willow and canna.The operation efficiency of artificial wetland in winter has the removal rate of COD up to 25-30%The practice of artificial wetland in airport economic zone embodies the best ecological and landscape value.Constructed wetlands in the landscape design should fully consider how to save time,energy and money in the building process,good at using site resources,in the form of artistic aesthetic feeling at the same time create a conservation-minded wetland landscape.