Study On Pollutant Removal Characteristics And Phosphate Accumulating Bacteria Distribution Of Different Constructed Wetland

It is concluded that conduct a one-year continuous detection of five differentconstructed wetland about the pollutant removal characteristics of Xi’an Zao heconstructed wetland from this passage, during this time, we have firstly talked aboutthe characteristics of pollutant removal from the combination of different processes ofconstructed wetlands. Meanwhile, we won the from the matrix sampling from the thedepth of the constructed wetlands, or the longth of wetlands, and we analysis thedistribution pattern of phosphate accumulating bacteria and total phosphorus,phosphate; So we provided the valuable information for the further study of theartificial wetland phosphorus removal mechanism.The results are listed as follows:(1) five the wetlands Series COD removal is not very different, and removalefficiency is maintained at between30%and90%steadily after March. BOD removalis about90%. TP removal of large amplitude, or the removal rate varies is from20%to90%. The TN removal effect,or the removal rate varies is from10%to80%.Removal of ammonia nitrogen removal rate varies from20%to90%. The SS removaleffect, or the removal rate is maintained at more than90%.(2) total number of organic phosphorus bacteria and inorganic phosphorusbacteria from the surface in the vertical constructed wetland,and from the middle tothe bottom gradually reduce; the level of phosphorus bacteria in the verticalconstructed wetland from the vertical direction to the surface, and from mid-level tothe underlying quantity gradually reduce; but, in the distribution table flow constructed wetlands from the horizontal direction, phosphorus bacteria distributionfrom front to back along the gradual reduction is from less to more, and then there arethe lower trend;(3) The analysis results show the different craft wetland substrate TP and PO43+:vertical subsurface flow constructed wetland TP in the surface layer and theunderlying content higher than the end of the content in the middle, PO43+distribution from top to bottom content gradually elevated; level undercurrentartificial wet ground, TP and PO43+in the vertical direction of the distribution andvertical undercurrent consistent, but the distribution in the horizontal direction, alonggradually increased, there is a downward trend; table flow constructed wetlands, TPalong the process first increases and then decreases, PO43+along gradually reduced.