Water Quality Control And Bio-remediation Technology Research For Cityscape Water Of Xi'an Qujiang North-South Lake

In today's world,the study of the water environment for body of water on the landscape has been progress.On the basis of studies of water bodies for other landscape in Xi'an,The quality of Xi'an Qujiang North-South Lake and the southern suburbs of the artificial lake have been monitored and analyzed in this paper,and we have done the release of the sediment experiment,and set up prediction model of Landscape water body.So we have analyzed Landscape caused by water causeing environmental problems and controling measures.Basing on Lakes classification standard nutrition index,Water quality of landscape water in Xi'an was eutrophic water quality in the degree of eutrophication.In response to this situation,through on-site test methods,Xi'an landscape ecological water purification and remediation technology have researched.The main contents and experimental results of this text:(1) Monitored and analyzed the quality of Qujiang North-South Lake and the southern suburbs of the artificial lake,and collected water quality data;evaluated water quality.The results showed:the majority of the water quality of water body landscape is not optimistic in Xi'an.This water quality did not achieve C water quality standards in《water quality standards for entertainment landscape》,and were the degree of eutrophication.Water quality trends have continued to deteriorate,the urgent need for water quality improvement measures.(2) Set up a prediction model of the landscape water and carried out sediment release experiments analyzed of the causes of water pollution,the results of the analysis determined to choose the ecological floating bed and biological contact oxidation technology to improve the combination of water quality in the landscape.(3) Chose an artificial lake about 180m² in the southern suburbs of Xi'an for field experiment,cultivated plants or plant selection experiment on the spot,achieved ecological floating bed and combination of bio-contact oxidation technology to improve the landscape of the field experiment of water bodies.Following are the results of field experiments such as:â‘ Observed the changes of plant growth and packing biofilm during the experiment;According to plant adaptability,resistance and determination of root oxidation power plant screening toselect the best bed floating plants,Through floating-bed cultivation and the wetlands water treatment plant contrast,field experiment had validated the feasibility and superiority of the floating-bed and bio-contact oxidation,that was the technology of a broader technology in the urban landscape water purification.â‘¡Through by monitoring the seven kinds of plant moisture content and in vivo TN,TP concentration to learn the ability of plant purification of eutrophic water body. The nitrogen content of Canna was the highest,up to 1.72%;The phosphorus content of Acorus calamus was the highest,up to 0.75%.Analysis of seven kinds of plants on nitrogen,phosphorus uptake,The results of treatment effects was:Canna>Dry Grass Umbrella>Iris>Typha,The effect of water treatment of ting-water wetland plants was: Acorus Calamus>Reed>Silvergrass.â‘¢Accordance with experimental results of water quality monitoring in,attained the removal efficiency of combination of four units on the nitrogen,phosphorus, turbidity,algae,COD_Mn.Accordanc with the results of the analysis,we can see that combination unit of Iris and Windmill grass was the effect of optimal treatment.TP removal efficiency of maximum was up to 95.7%;TN removal rate up to 89.2%; turbidity removal rate reached a maximum 90%;COD_Mngeneral at 20%-30%;algae removal efficiency of 70.96%.Good growth of the aquatic plants,biomass increased rapidly,which reflects feasibility and superiority of the floating-bed and bio-contact oxidation.(4) According to the results of analysising on water quality and researching about repair technology,water quality protection programs and engineering measures were proposed.