The Treatment Technology Of Wastewater Using Constructed Wetland System And Its Application In The Project Design

The design of the constructed wetland technology is studied in the paper, which is based on the discussion of its purificatory mechanism and influence factors. Combined with an engineering project"Yang Zhou Northward rerouting of southern river, east line govern the dirt constructed wetland system design", the basic configuration, types and design data of current wastewater treatment technology by the constructed wetland are introduced in this paper. The pivotal parameters of the design, selective principles of the plants planting at the constructed wetland and the steps are brought forward, and they are suit for the characters of the project. Their developing trend in interrelated field is discussed here.Currently, the phenomenon of the lack of water resources in our country is very serious,and more nutrilites in water have already affect any aspect of the construction. Controlling the gross of contaminations in wastewater becomes to be the main target at the field of pollution control, and at the same time wastewater as a new water resource has already become to be a new principle that can develop continuable. The system of the constructed wetland is a synthetic ecological system, and it has bigger amortizable capacity and better effect of disposal. It can attain the second or high class generally. Symbiosis among species and circulating reborn principle in ecosystem, the correlative principia between structure and function are supplied in it. At the precondition of the contaminations'benign circulation in wastewater, let productions'potential have a sufficient development, and prevent the environment's again polluted, and gain the most benefit of the wastewater disposal and recycling. At present many design models of the constructed wetland have some limitations. The models can't describe capabilities of different areas. Even if a certain index can be described by emendating, their indeterminacy radically bring on their no universality. By cost estimate, the cost of wastewater treatment in the engineer is 0.184 yuan per ton. Presently, traditional cost of wastewater treatment is between 0.3 and 1.2. Comparatively the cost of construction and operation of wastewater treatment in the constructed wetland is more cheaper, and the system is tend for maintenance and it has a remarkable benefit.As a new technology of wastewater treatment, the constructed wetland has many merits: less investment, brief circulation, stable effect of disposal, better water quality and so on. It is a more excellent project that can be adopted in developing area, residential area or a wide place in the road where has a better geographic condition.