Purification by Typha in Wetland with High Salt of Landscape River in Tianjin Economic Development Area(TEDA)

FU Chun-ping,TANG Yun-ping,CHEN Xi-jian,LI Jiang-hua(1.Tianjin Academy of Environmental Sciences Tianjin 300191,China;2.TEDA New Water Technology Limited Company,Tianjin 300457,China)

TEDA;purification efficiency of contamination;highly salty;reused water;typha wetland

The response of Typha wetland capable of decreasing contamination has been examined indoor laboratory.According to the pilot researches,the effects of Typha wetland and hydraulic retention time in the purification efficiency for highly salty reused water treatment in TEDA Landscape River were studied in this paper,while different kinds of contamination is evaluated.The results showed that the highly salty reused water purifying efficiencies for COD,TN,NH3-N,NO3-N,TP and PO4-P were significantly different with hydraulic retention time.Moreover,the removal ratio of COD was in a range of from 10.00% to 44.89%,TN was from 17.20% to 71.00%,NH3-N was from 30.28% to 74.06%,NO3-N was from 18.00% to 74.00%,TP was from 62.98% to 90.01%,PO4-P was from 64.99% to 92.01%;TDS from 3 900 mg·L-1 to 4 800 mg·L-1,respectively,which was not effected on purifying efficiencies for water quality and Typha vegetation.pH of Typha wetland for water treatment was smaller than empty wetland,however.Under the combination function of absorbability and decomposition of Typha roots and microbiology,the water qualities of treatment wetland with Typha were better than without the vegetation.It was suggested that it was possible to control contaminations of the water body by means of the planting the Typha in light of research results.Furthermore,the results of this investigation may be basis and technological references for operators to restrain the eutrophication in TEDA Landscape River body.