外加碳源对生活污水处理厂生物脱氮的研究

Study on Directions of External Carbon Source for Biological Denitrification in Domestic Sewage Plant

目前多数生活污水厂C/N比过小,碳源不足,出水总氮含量过高,反硝化效果不佳。本文根据国内外关于补充碳源最新研究成果,简要分析了传统碳源与新型碳源优缺点,并以乡镇生活污水处理厂作为实验研究对象,研究污水厂在生化过程中碳源投加后对脱氮效率的影响。结果表明,以醋酸钠为补充碳源投加到生活污水厂在运行7d后,氨氮和总氮出现明显降低,出水氨氮浓度平均稳定在1.5 mg·L^(-1)左右,出水总氮浓度稳定在10 mg·L^(-1)左右,脱氮效果显著。

At present,the C/N ratio of most domestic sewage plants is too small,insufficient carbon source,the total nitrogen content in effluent is too high,and poor denitrification effect.According to the latest research results on supplementary carbon sources at home and abroad,briefly analyzed the advantages and disadvantages of traditional carbon sources and new carbon sources,and took the domestic sewage treatment plant as the research object,studied on impact of adding carbon sources for the denitrification efficiency of biological denitrification.The results show that the Ammonia nitrogen and total nitrogen decreased significantly,after adding sodium acetate as a supplementary carbon source to the domestic sewage plant for 7 days,the average ammonia nitrogen concentration is around 1.5 mg·L^(-1),and total nitrogen is around 10 mg·L^(-1),the denitrification effect is remarkable.