摘要：

为强化生物脱氮同时降低剩余污泥产量，构建了A²O复合填料生物膜工艺，并考察了其污泥减量效果以及对人工配制污水的脱氮效果。研究结果表明：经A²O生物膜工艺处理后，出水平均COD、NH₃-N、TN分别为24.5、3.40、7.65 mg/L，平均去除率分别达到94.91%、85.74%、79.44%，污泥表观产率仅为（0.127±0.008）g/g；填料流速分离作用会促进悬浮态污泥形成生物膜，微生物的种群结构以及细胞形态发生较大变化，微生物群落物种更加丰富。

关键词: A²O生物膜, 脱氮, 污泥减量, 群落结构

Abstract:

In order to enhance the biological nitrogen removal and reduce the excess sludge output simultaneously, the A²O composite packing biofilm process was constructed, and its sludge reduction and nitrogen removal effect on artificially configured sewage were investigated. The results showed that the average concentration of COD, NH₃-N and TN in the effluent treated by A²O biofilm process was 24.5, 3.40, 7.65 mg/L, respectively, and the average removal rates were 94.91%, 85.74%, 79.44% respectively, and Yobs was only (0.127±0.008) g/g. The separation effect of packing flow rate promoted the formation of biofilm in suspended sludge, the population structure and cell morphology of microorganisms changed greatly, and the microbial population species were more abundant.

Key words: A²O biofilm, nitrogen removal, sludge reduction, community structure

中图分类号: 

• X703