Feasibility Study Of Wetland System In Treatment Of Wastewater In North Town Of China

In the wasterwater treatment process, natural wetlands and water purification function, and the resulting evolution of the wetland from the wasterwater treatment system has been a hot research.The reliability of performance and the stability of operation for wetland systems were still in research because of the complex mechanisms for water quality improvement and the sparse data of performance. The wetland system used on China's northern town wasterwater treatment study, there is no national precedent.The operational performances of two kinds of wetland systems in a treatment in Beijing under different seasons and defferent loading rates were discussed in the thesis. The results of the thesis have high value for the planning and designing of wetland system used for advanced municipal wastewater treatment.The definitions, functions, types, histories, and treatment mechanisms of wetland system were introduced in the thesis at first. Then, many first-order models and regression equations who came from several hundreds wetland systems in North America, British, Crezh republic and Denmark were gained from a large number of documents.According to the same latitude climatic conditions similar to the principle of screening out the same latitude with the Beijing region, the number of the sample, apply to a wetland system dynamics model and regression equation, and through theoretical analysis of the first-order kinetic model parameters amendment for the final two wetland system, the average treatment effect and the effect of changes in the model forecasts, and by analogy pilot study to predict the results of the verification, that a very useful conclusions.This paper also discusses the types of the existing wastewater reuse water quality standards, and made life miscellaneous water and landscape water replenishment of the proposed wastewater reuse water quality standards. Based on the above criteria, with the predicted results obtained on the wetland system to be purified by the way.Wetland System construction, and operation of low-cost, and sewage purification wetland system better than conventional treatment unit, has a certain visual effects and high ecological benefits, and people growing concern for the ecology of the area and provided a good opportunity to promote application. The study results also show that the wetland system in the northern town of wasterwater purification China has a broad prospect.