A_2N工艺碳源分子质量分布及利用对脱氮特性的影响  

THE INFLUENCE OF THE MOLECULAR WEIGHT DISTRIBUTION AND UTILIZATION OF CARBON SOURCE TO DENITRIFICATION CHARACTERISTIC IN A_2N PROCESS

作　　者：刘祥[1] 何成达[1] 苗小丽[1] 俞力[1] 王雅芳[1] 吴军[1] 

机构地区：[1]扬州大学环境科学与工程学院,江苏扬州225127

出　　处：《水处理技术》2014年第1期96-99,103,共5页Technology of Water Treatment

摘　　要：利用超滤-纳滤膜法对改进A2N工艺污水中碳源分子量进行测定,根据分布变化及利用研究不同分子量大小碳源对硝化-反硝化特性的影响。结果表明,好氧硝化池中,各分子质量区间的有机物都有所利用,其中10×104～5×104、<3 k的有机物分别利用92.16%、72.33%,且该区间有机物浓度过高对硝化反应有显著抑制作用,尤其是<300的表现最为显著,而>10×104的大分子有机物对硝化反应无明显抑制作用;缺氧反硝化池中,DPB污泥不仅能利用小分子有机物也可利用部分较大分子有机物进行脱氮,其中小分子利用主要集中在<500的区间上,大分子利用主要在5×104～1×104的区间上,而对1 k～500的小分子有机物利用较少。Nanofiltration-ultrafiltration membrane method is used to determine the molecular weight distribution and its changes of wastewater carbon source in the modified A2N process. According to the distribution, changes and utilization, the influence of different molecular size carbon source on nitrification-denitrification characteristic was studied. The results show that in the aerobic nitrification,the various molecular weight range of organic compounds have been used, among them, 10×10^4-5×10^4, 〈3 k of organic matter using 92.16%, 72.33%, and high concentration had a significant inhibition of nitration reaction, especially the most significant in 〈300, and 〉10×10^4macmmolecular organic matter has no obvious inhibition to nitration; In the anaerobic denitrifying, DPB sludge not only can use small molecule organic matter, the larger molecules can also be used for denitrification, in which small molecules are mainly concentrated in the 〈500 range, large molecules mainly within the range of 5×10^4- 1×10^4, and the small molecule organic matter of 1 k-500 use less.

关 键 词：A2N工艺 脱氮 碳源分子量 超滤-纳滤膜法 

分 类 号：TQ028.8[化学工程]