硝酸盐循环比对新型厌氧/缺氧/好氧（A2/O）-生物曝气滤池（BAF）系统同步生物脱氮除磷的影响。

Effect of nitrate recycling ratio on simultaneous biological nutrient removal in a novel anaerobic/anoxic/oxic (A2/O)-biological aerated filter (BAF) system.

机构信息

Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, Beijing University of Technology, Beijing 100124, China.

出版信息

Bioresour Technol. 2011 May;102(10):5722-7. doi: 10.1016/j.biortech.2011.02.114. Epub 2011 Mar 5.

DOI:10.1016/j.biortech.2011.02.114

PMID:21459571

Abstract

A novel system integrating anaerobic/anoxic/oxic (A(2)/O) and biological aerated filter (BAF), which could solve the sludge retention time (SRT) conflicting problem between nitrifiers and polyphosphate accumulating organisms (PAOs) by shortening SRT for PAOs in A(2)/O and lengthening SRT for nitrifiers in BAF, was investigated in this study. Various nitrate recycling ratios (100%, 200%, 300% and 400%) were applied to a lab-scaled A(2)/O-BAF system to detect the simultaneous biological nitrogen and phosphorus removal performance while treating real domestic wastewater with low carbon to nitrogen (C/N) ratio. The concentrations of chemical oxygen demand (COD), NH(4)(+)-N and total phosphorus (TP) in the effluent were less than 50.0, 0.5 and 0.5mg/L, respectively, throughout the experiments. The removal efficiencies of total nitrogen (TN) were 64.9%, 77.0%, 82.0% and 87.0%, under respective nitrate recycling ratios (increasing from 100% to 400%). By contrast, nitrate recycling ratios had neglectable effect on the removal efficiencies of COD and NH(4)(+)-N.

摘要

本研究采用一种新型系统，即将厌氧/缺氧/好氧（A(2)/O）工艺和生物曝气滤池（BAF）相集成，通过缩短 A(2)/O 中聚磷菌（PAOs）的污泥停留时间（SRT）和延长 BAF 中硝化菌的 SRT，解决硝化菌和聚磷菌（PAOs）之间 SRT 冲突的问题。在处理低碳氮比（C/N）实际生活污水的过程中，该系统采用不同的硝酸盐循环比（100%、200%、300%和 400%），以检测同时进行生物脱氮除磷的性能。实验过程中，出水的化学需氧量（COD）、氨氮（NH(4)(+)-N）和总磷（TP）浓度分别低于 50.0、0.5 和 0.5mg/L。硝酸盐循环比分别从 100%增加到 400%时，TN 的去除率分别达到 64.9%、77.0%、82.0%和 87.0%。相比之下，硝酸盐循环比对 COD 和 NH(4)(+)-N 的去除率几乎没有影响。