Constructed Wetlands Processing Low Pollution Water Test

In recent years, the eutrophication problem is China’s lakes, rivers, reservoirs andother facing the most major problem, the water content of nitrogen and phosphorus inthe overweight of the water-body eutrophication key problems. Around theseproblems, this paper discusses on the following:Firstly the typical wet plant screening, and the results show that canna inremoving water ammonia nitrogen, total nitrogen, total phosphorus, soluble totalphosphorus aspects were superior to the reeds and then force flowers, calamus andwater bamboo, and at the same time for vertical flow constructed wetland andecological floating bed, biological filter three kinds of technology are compared, theresults showed that, nitrogen and phosphorus removal ability: integrated vertical flowconstructed wetland> ecological floating bed>biological filter.Secondly in vertical flow constructed wetland system operation parametersoptimization research, the use of vertical flow constructed wetland to Tuanjiu lakeprocessing, research shows that, the wetland system in hydraulic retention time (HRT)is related to12hours; Canna planting density is6strains; Packing height is35cm,wetland system removal of nitrogen and phosphorus in the lake of Tuanjiu the bestresults.Finally, the canna vertical flow constructed wetland removal of nitrogen andphosphorus in the lake of Tuanjiu ability, after88days of operation cycle, test processsystem for nitrogen phosphorus removal effect is good, before and after test thecontent of nitrogen and phosphorus in plants, makes a comparative study on the latebefore the test, canna body nitrogen content of an average of21.7mg/g and25.2mg/g,and the content of phosphorus average5.6mg/g and6.2mg/g, river pollution in waterbody of nitrogen and phosphorus removal and plant biomass into positive correlation,the analysis results show that the vertical flow constructed wetland on nitrogenremoval relies mainly on the packing of adsorption、 nitrification and denitrification、plant absorption; For phosphorus removal relies mainly on the packing of adsorption、microbial absorption and plant absorption。...