Experimental Study Of Ornamental Plants On Sewage Purification Ability

At present, the eutrophication of water is increasing seriously, whichobstacles and constraints our country’s economic and social development. As anEnvironment-friendly sewage treatment technology which is in low capital cost andlow processing costs, Artificial wetlands is paid to more and more attention. Plants inthe wetland system plays a key role, and the paper inspects the physiological andecological characteristics of wetland plants and sewage treatment effect by usingSoilless culture technology. According to the material migration law of EcologicalPrinciples, the paper try to break the traditional technology of Terrestrial flowers,andthrough Screening, cultivate some Terrestrial flowers and Using the water carrierfloating on the water plant in transplantation, try to pure water, landscaping, andincrease economic efficiency. the paper research on the wastewater in AgriculturalUniversity Of Henan, and make Chlorophytum as subject, the contents of the paperinclude Growth characteristics of Chlorophytum and Purification of sewage, at last,the results show as follow:1.with its good water suitable, tolerance and economic, as well as bud strain, andeasy to sub-planted, Chlorophytum become the preferred the soilless flower plants fordomestic wastewater treatment. The Chlorophytum under soilless culture has acomplex and well-developed root system, it can maintain normal photosynthesis,water metabolism, mineral metabolism, maintain a normal growth rate, and lay thefoundation for large-scale application of Chlorophytum in the sewage treatment.Chlorophytum system sewage TN, TP, the COD, the better purification effectcompared with the non-plant system of TN, TP, COD removal efficiency hasincreased significantly.2.when Chlorophytum is used as a sewage purification plant, its main root thicklateral roots developed dispersion for microbial attachment and transmission ofoxygen. But compared with the greater biomass per unit area of the plant, per unitarea absorb less contaminants, thus affecting the purification effect. Throughout thesystem, the COD removal efficiency was57.8%, TN removal efficiency was51.5%,TP removal efficiency of68.3%, therefore, can be considered with other plants with training, to optimize the purification effect.3.when building the sewage treatment system, the purifying effect and thepurification efficiency should be considered. Dimensionless influent concentrations ofcertain conditions, the water load is too large that causes the hydraulic retention time,amounting to less than purification requirements; water load is too small to make thehydraulic retention time extension, the purification capacity of the system can not givefull play to affect its cleaning efficiency.the result shows:when HRT is3d,theRemoval efficiency is90%of that when HRT is4d,so the HRT is set in3d.4.Because there is no new waste water in the system, the processing of the staticsystem is better than the dynamic system. System of plants growing well, the designof the running time, the plants in the two systems is significantly growing. Soillessculture processing systems in the effective removal of pollutants at the same time,landscape value and economic benefits, and thus reduce the cost of sewage treatmentfrom the whole, and can greatly limit the use of sewage treatment plant is limitedspace available, this approach is especially suitable for small and medium-sized townor residential area sewage treatment.