| Wetland is controlled by the construction and operation of artificial marshes similar with the ground, sewage, sludge and controlled dosing into the ground by artificial wetlands construction, sewage and sludge in the direction of flow along a certain course, the main advantage of Soil, artificial medium, plants, microorganisms of the physical, chemical, biological triple synergistic effect on the sewage sludge treatment of a technology. Its mechanism of action, including adsorption, retention, filtration, redox, precipitation, microbial decomposition, transformation, plant shelter, residue accumulation, nutrient uptake and transpiration of water and the role of various types of animals.Constructed wetland sewage treatment system is a better way of wastewater treatment, especially in its full production potential of resources to prevent further pollution of the environment, access to sewage treatment efficiency and the best resources, so it has higher environmental benefits, economic and social benefits, is not suitable for the handling of water, water quality is not great, the management of urban waste water level is not high, such as rural, small town sewage treatment. Constructed wetland sewage treatment as a new technology should be further improved, it is necessary to study more detailed characteristics and performance data in different regions in order to build in the future to provide more reasonable parameters.Changyi District Jilin existing six natural villages wasteland village, planning to end in 2012, will be combined into a large well-off villages and towns of the progressive realization of (well-off villages along the river on both sides of Feng Shi) . Therefore, the sewage pipe network will be well-off village center building, so as to achieve unity of purpose of the collection of sewage, the final instructions from persons with wetland banks of the river to reach the purpose of sewage treatment. For the time being, the relocation of the villages can not be used to build the channel of the sewage has been collected, Feng Shi River flows into the river purification of natural wetlands.Wetland has a strong self-purification capacity, but very cold winter in Jilin, thick permafrost, wetlands generally about half a year in hibernation, hardly of the function of sewage treatment. To this end, a large wilderness characteristics of the village selected based on the construction of climate in the region, "subsurface constructed wetlands", in order to address the general wetland issues can not run in winter.Presently, the village has not yet wasteland to build sewage treatment plant, the village without any treatment of wastewater discharged into the drainage canal that, and the rapid economic development in recent large wasteland, the village has led to increased volume of sewage and drainage channel water quality deterioration, which directly affect local environmental health and quality of crops. Construction of sewage treatment works to improve the Feng Shi River water quality, improve the investment environment, improve the large wasteland village infrastructure, promoting sustainable economic development of great significance. |
