|
Water eutrophication outside contaminants large input of nutrients in the sediment release of endogenous common cause of ecological degradation process, is currently facing water worldwide environmental problems. Serious eutrophication of water bodies in the rural areas of Hubei, has become a major environmental problem, threatening the water security of residents' production and living. Pollutant emissions of the rural areas not only pollute the local environment, but also become a major source of pollution of the water bodies in the entire Hubei Province and surrounding areas, the total amount of emissions of pollutants over the province's industrial pollution emissions. Therefore, the rural areas of black-odor eutrophic water governance has become a hot research, carry out research in this area has important theoretical and practical significance. In rural areas, the pollution of water bodies in scattered locations, complex and diverse source water quality. Because of these characteristics, can not be used to collect processed centrally, while the economic conditions of the rural areas impossible invested enormous conventional water treatment methods. Artificial floating island has a small investment, low operating costs, can be flexible to changes in application size, no secondary pollution, eutrophication of water treatment technology is very suitable for rural areas. In this paper, a combination of methods of laboratory analysis and field experiments, conducted a study of the application of of artificial creatures floating island technology in the rural areas of Hubei, and take solid waste bioreactor processing straw waste, to exempt secondary solid waste pollution. The experiment was divided into indoor experiments and outdoor field experiment in two parts. Conduct laboratory experiments on 18 kinds might adapt to the floating island the water plant growth environment screening experiments, canna, water spinach, Chun Yu, cattail, chard, rapeseed, rice and reeds and other plants can be normal on the surface floating island growth, and adapt to the climatic conditions of the area in Hubei these eight species as Floating Island plant in Hubei Province, the promotion and application is feasible; then, chard selected from eight kinds of plants that have never been reported in the literature, Chun Yu and Rape, design quantitative test assay each plant processing capacity. Quantitative test experiment, each plant with a natural water body configuration with mild, moderate, severe three different experimental water nutrient concentrations, and sampling timing determination of nitrogen and phosphorus in water changes, found that these three species are good processing ability, and more serious water eutrophication, a plant growth better, more processing capacity; Finally, for the experiment found that mild eutrophic water nitrogen and phosphorus and other nutrients can not be required to meet the plant growth the problem, test the expansion artificial vermiculite and ceramic adsorbent material to auxiliary plant growth, and achieved good results. Hubei rural areas, a serious eutrophication of ponds in conducting outdoor field experiment, select an area of ??about 1000 m to 2 planted rapeseed on the water, chard, dry umbrella grass, canna, water spinach, reed, spring Yu plant species, Ukishima total area accounting for 20% of the total area of ??the pond. After treatment, the water quality has been greatly improved, spinach and other crops also get a certain amount of output. Rape, water spinach, dry umbrella grass, reeds and Canna, detection of the plants were nitrogen and phosphorus content and plant weight these several plant growth, which plants absorb the amount of nitrogen and phosphorus from the water, then thrust reversers plant water volume can be improved in the entire growth process. After calculation, the canola plants per square meter on the floating island area, water spinach, dry umbrella grass, reeds and Canna in a growth cycle can handle the volume of sewage were 35m ~ 3,109 m to 3,44 m to 3,177 m ~~ 3,37 m ~ 3 (Ⅴ class to class Ⅲ water, in terms of total phosphorus).
|