The Research Of Plants Floating Bed In Tang-xun Lake And Sewage Removal Efficiency

The use of plants floating bed processing sewage in the present study holds a largeproportion, played an important role in water purification and landscaping。This articleresearched and analyzed the grows well in central China area of the types of aquatic plants,chose cannas, calamus, dripping water lotus, water onion, calla lily, water hyacinth, flower,spring force again, powder palm nine brand with high economic value and ornamental valueas a test of aquatic plants, combination of plant floating bed technology, research the plant inthe polluted water’s decontamination ability. This experiment mainly studies the contents ofthe three aspects: first studied selected plants in sewage the growth ability and to testcontamination removal in effect; The selection of the plant in the acidic environment for thegrowth of the ability and test contamination removal in effect; And then research compoundthe growth of plants ability and to test contamination removal in effect. Test conclusions canbe summed up as follows：1. Cannas, calamus, dripping water lotus, water onion, calla lily doesn’t fit in the test insewage growth, the other four kinds of plants in the sewage all can normal growth. By theend of the flower, spring force again, taro and water hyacinth, luxuriant growth aspect, thespring and the growth of the ability water hyacinth taro, the strongest, not only the vigorousgrowth, their root there is also a greater growth, the plants from the experiment began to 22cm and 15 cm increase to 49 cm and 40 cm, growing fast.2. From the test results we can see, again flower, spring force, taro and water hyacinthpatients have aspect of certain decontamination ability. Test water in pH is dropped, the rootgive a lot of soluble oxygen, making the water dissolved oxygen content increased, TN,NH3-N, TP and COD concentration decline. The TN and TP average respectively66.0%-74.5%,the removal rate 71.4%-81.8%, the water of nitrogen and phosphorus nutrientsto purify; Because of pollutants in the precipitation, the root of microbial degradation ofadsorption and effects, COD removal rate 59.7% -80.1%; But NH3-N remove the effect is notobvious, only a 60.1% to 40.4%. Combination of plant growth and development of thesituation and the ability of sewage removal, the comprehensive performance is good plant forwater hyacinth > spring taro > taro > again force flowers.3. Through the composite plants decontamination properties test, we can see that thecomposite plants in of the sewage treatment environment, in comparison to a single varietyplant handling, whether plant growth is in decontamination ability greatly improve, the watercontamination removal in a high efficiency. 4. Design a kind of new carrier of the bed, overcome traditional floating bed brittle easyto fall hard to carry shortcomings, is also one of the paper’s innovations.5. Using mathematical model set up in and out of the water in the system of theconcentration of the regression equation, using mathematical methods validation tests andtheoretical values value the difference, and are convenient for test carry on the summary and...