The Plant Space Technology Of Dian Lake Pollution Control

Using aquatic plants to restore the eutrophic water is hot technology on polluted rivers and lakes ecological restoration and water purification in recent years. Ecological floating bed technology as its advantages of simple application, good water quality purification effect, beautify the environment and so on has been paid attention and widely applied. Submerged plants grow under water and can form a larger community and biomass. Through the function of adsorption, absorption and transformation, submerged plant repair technology can reduce the degree of eutrophication, inhibit algae outbreak and has a better purification effect. But the growth of submerged plants are greatly influenced by the water transparency, submerged plant repair technology is rarely used in the practical engineering application. Based on the load control and water quality of Dian Lake comprehensive improvement technology study and engineering demonstration project, we design a water plant joint water purification function of aquatic plant and submerged plant space technology, reasonable use of water space, spatial growth pattern of aquatic plants, maximum limit to absorb the nutrients in lake.In view of the aquatic plant space technology, the main work in the thesis is summarized as follows:1. According to the research status of ecological floating bed and the submerged plant repairing technology, analysis the main technical points of structure design of ecological floating bed and ecological "jellyfish".2. Through analysis on the advantages and disadvantages of different types of substrates, we select the appropriate aquatic plant growth substrate. The results showed that brown fiber and mineral filler particle is a ideal growth matrix. At the same time, we can take a combination of several different types of matrix approach in practice, which may make up their shortcomings.3. Using the existing aquatic plants which has a better water purification (barracuda grass, sunshade, grass, calamus, foxtail algal) as experimental object in Dian Lake, to study the plants impact on water purification under aeration and non-aeration conditions. Results indicate that the aeration condition water plant TN, NH3-N, NO2-N remove rate increases, and NO3-N, TP, PO4-P remove rate was relatively low.4. Combined with the previous research of this paper, design suitable ecological floating bed and ecological "jellyfish" for the scene of the Dian Lake. Ecological "jellyfish" with submerged plant growth carrier of water depth can be adjusted can meet the requirements of plant growth in different stage. Combine ecological floating bed with ecological "Jellyfish", to construct a system of aquatic plant space.5. Carrying on ecological floating bed field test, we research the practical applications effect of ecological floating bed technology.