Technical Research On Improving Ammonial Nitrogen Remove Effect Of Subsurface Flow Constructed Wetland

Along with our country economy of development, population of increment, the city turn continuously speed of the progress and scale continuously extension, The sewage which eject by the city retain a increase trend all the time, the aquatic pollutant category and amount also consumedly increase. Although most of the big and medium-sized city have built varieties of sewage treatment plant, because of complicate composition and huge amount of the sewage, the difficulty and scale of city sewage treatment plant enlarge continuously, the cost also increased. Under this condition, to establish dispersion type of sewage treatment equipment in the city's main living area is an important means to solve the treatment problem, not only have advantage to relieve the pressure of sewage treatment plant, but also have advantage to the water's reuse which make good society performance, economy performance and environment performance.Constructed wetland is a new sewage treatment technique which have merits such as: have higher treatment effect, convenient management maintenance, good environment performance, lower expenses and so on. In recent years, constructed wetland have expansion use to remove the organic pollutant and ammonia nitrogen pollutant and obtained quite good effect. But the removal of ammonia nitrogen is the crux of constructed wetland. To increase the hydrophyte's oxygen deliver capacity. from recent research result, the spread of hydrophyte oxygen ability is not good enough to since clean high burden of organic matter, again creation the nitric turn a function, although pass Pu spirit and water circle can exaltation ammonia nitrogen of clean a rate, isn't very ideal of choice.This paper take the sewage as object, through the research on the removal mechanism and transfer rule of vertical subsurface flow constructed wetland. By filter different filling, plant, domestication microorganism and change pH of sewage to increase the remove effect of constructed wetland from these methods find the way which can increase the remove effect efficiency.This research has strong practicability and comprehensive. Aim at the present condition of lower ammonia nitrogen remove effect by constructed wetland. Consider the factor which can influence the remove effect, and finally find a best route which remove the ammonia efficiency.