Performance of vertical subsurface flow constructed wetland for wastewater treatment;

Artificial wetland was applied in combination with traditional wastewater treatment technology,and an intensified pre-treatment system was introduced to high-efficiency vertical flow constructed wetland so as to improve the wetland treatment.

The hydraulic pattern of the vertical flow constructed wetland was studied in this paper.

In this experimental study,the vertical flow constructed wetland is employed to treat domestic sewage,rumex acetosa linn is selected as constructed wetland macrophyte.

Several kinds of media were utilized in the vertical flow constructed wetlands simulation system to treat wastewater at hydraulic loading rate of 1 000~2 500 mm·d-1,including gravel,zeolite,anthracite,shale,vermiculite,ceramic filter media,blast furnace steel slag and round ceramsite.

According to the operational aspect of Shiyan vertical constructed wetland,this paper analyzed the treatment effect,removal efficiency and economical efficiency of engineering,the main results show that wastewater treatment by using vertical-flow constructed wetland is ef.

The Hunnan vertical-flow constructed wetland can survival through the winter with certain heat preservation measures,exchange air by making use of influent and effluent flow,compensate the oxygen inadequacy of the bed,which improves the removal rates of contaminants and reaches the similar treatment effect to other seasons.