在低氧浓度下，用低 COD/N 比的废水进行脱氮。

Nitrogen removal from wastewater with a low COD/N ratio at a low oxygen concentration.

机构信息

University of Warmia and Mazury in Olsztyn, Department of Environmental Biotechnology, Słoneczna Str. 45G, 10-709 Olsztyn, Poland.

出版信息

Bioresour Technol. 2011 Apr;102(7):4913-6. doi: 10.1016/j.biortech.2010.12.116. Epub 2011 Jan 8.

DOI:10.1016/j.biortech.2010.12.116

PMID:21295973

Abstract

The goal of the study was to determine the effectiveness of nitrification and denitrification and the kinetics of ammonia removal from a mixture of wastewater and anaerobic sludge digester supernatant in an SBR at limited oxygen concentration. In addition, the COD removal efficiency and sludge production were assessed. In the SBR cycle alternating aerobic and anaerobic phases occurred; in the aeration phase the dissolved oxygen (DO) concentration was below 0.7 mg O(2)/L. The low DO concentration did not inhibit ammonia oxidation-nitrification and the efficiency was ca. 96-98%. However, a relatively high COD concentration in the effluent was detected. The values of K(m) and V(max), calculated from the Michaelis-Menten equation, were 43 mg N-NH(4)/L and 15.64 mg N-NH(4)/L h, respectively. Activated sludge production was almost stable (0.62-0.66 g MLVSS/g COD). A high net biomass production resulted from a low specific biomass decay rate of 0.0015 d(-1).

摘要

本研究旨在确定在低氧浓度下，SBR 中废水和厌氧污泥消化液上清液混合物的硝化和反硝化效果以及氨去除动力学。此外，还评估了 COD 去除效率和污泥产量。在 SBR 循环中，交替进行好氧和厌氧阶段；在曝气阶段，溶解氧（DO）浓度低于 0.7 mg O(2)/L。低 DO 浓度并未抑制氨氧化-硝化，效率约为 96-98%。然而，在出水中检测到相对较高的 COD 浓度。根据米氏方程计算的 K(m)和 V(max) 值分别为 43 mg N-NH(4)/L 和 15.64 mg N-NH(4)/L h。活性污泥的产生几乎稳定（0.62-0.66 g MLVSS/g COD）。由于特定的生物质衰减率低（0.0015 d(-1)），导致净生物质产量高。