摘要： 为有效控制二级出水总氮（TN）浓度，以增强型聚偏氟乙烯（PVDF）中空纤维帘式膜为膜曝气生物膜反应器（MABR）的膜组件，对低碳氮比二级出水深度脱氮的可行性与稳定性进行了研究。中试实验以NO₃^--N为氮源连续进水，通过控制进水溶解氧（DO）、曝气强度以及水力停留时间（HRT），得到了适宜的运行参数。结果表明，曝气压力为0.01 MPa，膜面曝气流速为0.005 cm/min，HRT为8 h时，出水水质稳定，出水TOC为4 mg/L左右（COD为10 mg/L），TN稳定在15 mg/L以下，达到《水污染物综合排放标准》（DB 11/307—2013B）要求，处理量为34.5 L/（m² ·d）。

关键词: 膜曝气生物膜反应器, 曝气强度, 水力停留时间, 深度处理

Abstract: To effectively control the concentration of secondary effluent total nitrogen(TN), using enhanced PVDF hollow fiber membrane as the membrane module of MABR, the feasibility and stability of advanced denitrification of secondary effluent with low C/N ratio by membrane-aerated biofilm reactor(MABR) have been researched in pilot scale. In the pilot-scale experiments, NO₃^--N is used as main nitrogen source feeding water continuously. Appropriate opera-tion parameters are obtained by controlling the dissolved oxygen(DO) in influent, aeration intensity and hydraulic retention time(HRT). The results show that when aeration pressure is 0.01 MPa, intra-membrane aeration flow rate 0.005 cm/min, and HRT 8 h, the water quality of the effluent is stable, the mass concentration of effluent TOC around 4 mg/L(COD is 10 mg/L), and TN concentration maintains at less than 10 mg/L, reaching the Comprehensive Dis-charge Standard of Water Pollutants(DB 11/307-2013B) whose treatment capacity is 34.5 L/(m²·d).

Key words: membrane aeration biofilm reactor, aeration intensity, hydraulic retention time, advanced treatment

中图分类号: 

• X703.1