Pilot Plant Research On Hydrolysis & Micropore Aeration Integral Combined Oxidation Ditches In The Process Of Municipal Sewage Treatment With Low C/N Ratio

With the rapid developing of China's economic and the improvement of people's living standards, lifestyle changes corresponding,the pollutant's composition and proportion of sewage changes also.Now in most cities of China,carbon content in sewage was observed to be low.The effect of the traditional Nitrogen removal process is not that impressive.And the lower carbon/nitrogen ratio, the more difficult and higher cost to treat it .In recent years, our country pay more attention to the water environment , especially in Taihu Lake Basin and other sensitive areas. In 2007, the event of blue-green algae bloom in Taihu Lake had accelerated nation's transformation to municipal wastewater treatment plant in Taihu Lake Basin, requesting the effluent water meeting《Discharge standard of pollutants for municipal wastewater treatment plant》(GB18918-2002)the first A standard. How to improve the denitrification effect of the low carbon/nitrogen ratio sewage become the hot spot and the difficult point in research.This paper takes the influent in LuCun sewage treatment plant in Wuxi City as the research beau, In this study.On the based of previous researches, low C/N ratio municipal domestic wasterwater was s tudied using Hydrolysis & A/O process.,verification the predominant of the process. This craft to COD, NH4+-N, the TN average elimination rate respectively was 84% and 98.34%, 70.73%, the average water leakage density respectively was 48.94mg/L, 0.45 mg/L, 9.91 mg/L, achieves the national first-level A standard.Test contents including startup operation of the reactor and the treatment effect in different mixed liquid recycle ratio and the way influent,find the Optimal reaction parameters and research the mechanism of hydrolysis denitrification.The nitrogen removal efficiency with improved Hydrolysis & micropore aeration integral combined oxidation ditches in the process of municipal sewage treatment with low C/N ratio was good.The TN concentration in effluent water was lower than the first A standard.In this paper has some guiding significance and reference value in solving the problem of inadequate carbon sources in nitrogen.