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With the rapid development of the economy, the acceleration of the urbanization process in China, the Chinese urban waste output is growing. Landfill leachate due to its complex composition, concentration, and other characteristics of the changes in water quality, the application of traditional processing methods are often difficult to reach the Solid Waste Landfill Pollution Control Standard (GB16889-2008), and easy to produce secondary pollution become urgent One of the problems to be studied and solved. Repair technology has diversity of aquatic plants, relevance and efficiency advantages, low operating costs, ease of maintenance management, landscape effects, for leachate tail water treatment provides a new way of thinking and ways. This study, according to the Old Port landfill leachate tailrace water quality characteristics, the choice of the iris, yellow iris, cattails, and then to force flowers and mosaic Arundo donax as experimental subjects, on a regular basis to detect leachate tail water quality hydroponic experiments determination of the nitrogen and phosphorus content of the plant before and after the experiment and plant biomass, height, root length changes, so as to explore the effect of a single species of the leachate tail water purification, analysis and comparison, and filter out the effect of water purification, aquatic landscape effect plant species; leachate tail water aquatic plants and three plants - yellow iris, calamus and then force flower permutations hydroponic experiments to explore different aquatic plant configuration mode on the the leachate tail water purification, so as to repair of plant selection and configuration of the technology to provide the basis for further put forward feasible suggestions on the, Landfill leachate tail, the old port water treatment. The results showed that: 1, yellow iris, iris, cattail, and force and then spend the removal of landfill leachate tailrace indicators have significant role. Treated water indicators are basically achieve the Solid Waste Landfill Pollution Control Standard (GB16889-2008). 2, with decreasing the tail water concentration in the leachate, reduced tail water stressed plants, plant fresh weight growth rate, dry weight growth rate, root length growth in volume and the amount of plant height growth presents an increasing trend, which Huang The calamus growth is most vigorous. 3 mixed planting with other plants, iris, Iris pseudacorus and then force the flowers fresh weight and dry weight growth rate showed increase, but due to the growth stage, intraspecific and interspecific competition, plant height and root length increase changes vary depending on the plant, not consistent increases than individually planted. 4 different plants in different stain and purify role of: the Mosaic Gramine higher death rate in water at various concentrations of leachate Last weak stain, not suitable for landfill leachate tail water purification processing . Tail water in high concentrations of leachate, the cattail growth was inhibited only be applied at lower concentrations of leachate tail water purification process. Selected species, most calamus phosphorus removal capacity of leachate tailrace strongest, the Iris pseudacorus for nitrogen removal of leachate tailrace capacity while COD removal capacity strongest force spent tailrace and because of its large biomass, the amount of nitrogen and phosphorus enrichment of individual plants. 5, iris, Iris pseudacorus and again force spent three kinds of plants mixed planting tail leachate water TN and TP final removal rate significantly greater than twenty-two mixed planting and single planting; the mixed planting twenty-two tail leachate water Most of the final removal rate of TN and TP significantly improved; compared with single planting mixed planting with a single planting the final removal of NH4-N and COD were no significant differences. 6 plants for each treatment group total nitrogen, phosphorus enrichment Statistical analysis showed that: three species mixed planting, processing plant total nitrogen, phosphorus enrichment significantly greater than twenty-two mixed planting and a single planting, two mixed vegetation when compared to a single planting, most of the processing plants of total nitrogen, phosphorus enrichment significantly improved. Three species mixed planting, calamus and Iris pseudacorus unit dry diazo phosphorus enrichment significantly greater than the single planting; the mixed planting twenty-two unit dry diazo no consistent increase in the amount of phosphorus enrichment; longer force spend a single planting, the amount of nitrogen and phosphorus enrichment rather than the larger of the hybrid unit dry weight. 7, yellow iris, calamus and force and then spent three species mixed planting, compared with single planting, can reduce stress, leachate tail water plants, improve the biodiversity of the system to improve the structure and function of the system, increasing the food chain (network) of matter and energy in the conversion of ways, so as to form a more stable water purification systems, can greatly improve the effect of aquatic plants on the the leachate tail water purification.
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