YANGXin-ci,LIJun,ZHOUJia-zhong,et al.Comparison of Pure MBBR and Activated Sludge for High Standard Denitrification of Wastewater[J].China Water & Wastewater,2025,41(2):95-100.
生物膜和活性污泥用于污水高标准脱氮对比
- Title:
- Comparison of Pure MBBR and Activated Sludge for High Standard Denitrification of Wastewater
- Keywords:
- activated sludge process; biofilm process; high concentration sewage; MBBR process; biological nitrogen removal; intensive construction; operation regulation
- 摘要:
- 北方某高基质浓度污水处理厂设计处理规模为12×104 m3/d，分两期建设，核心工艺分别采用活性污泥法和生物膜法。从运行效果、工艺机理、运行调控等方面分析了两种工艺的应用情况及脱氮效果差异。从运行效果来看，生物膜法的脱氮能力更强，生物池出水NH3-N和TN分别达到（0.45±0.37） mg/L和（3.79±0.81） mg/L，生物膜法的硝化与反硝化负荷分别是活性污泥法的2.73和1.52倍，生物膜法生化段的吨水占地仅为活性污泥法的35.08%，实现了集约化建设并提升了系统的抗冲击负荷能力。从工艺机理来看，生物膜法的硝化菌和反硝化菌的绝对生物量分别为活性污泥法的20.68、1.53倍，是生化效率提升的内在原因。从运行调控来看，活性污泥法应重点关注污泥形态和运行环境，而生物膜法不富集活性污泥，但应保证良好的传质传氧效果和设备结构的稳定。
- Abstract:
- A high concentration sewage treatment plant in north China with design treatment capacity of 12×104 m3/d, was constructed in two phases. The core processes are activated sludge system and biofilm system, respectively. The application of two different systems and the difference of denitrification effect were analyzed from the aspects of operation effect, process mechanism, and operation regulation. From the perspective of operation effect, the nitrogen removal capacity of the biofilm system is stronger. The effluent NH3-N and TN of the biological tank reach （0.45±0.37） mg/L and （3.79±0.81） mg/L, respectively. The nitrification and denitrification load of the biofilm system is 2.73 and 1.52 times that of the activated sludge system, respectively. The per ton water occupation of the biofilm system biochemical section is only 35.08% of the activated sludge system, achieving intensive construction and improving the antishock load capacity. From the perspective of process mechanism, the absolute biomass of nitrifying and denitrifying bacteria in the biofilm system is 20.68 and 1.53 times that of the activated sludge system, respectively, which is the internal reason for the improvement of biochemical efficiency. From the perspective of operation regulation, activated sludge should focus on sludge morphology and operating environment, while biofilm method does not enrich activated sludge, but should ensure good mass and oxygen transfer effect and stability of structural equipment.
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