不同氨氮、亞硝酸氮濃度對厭氧氨氧化反應除氮之影響

Effect of Ammonium, Nitrite Concentrations on Nitrogen Removal of ANAMMOX Reaction

夏聰惠(Tsung-Hui Hsia) ； 馮宇柔(Yu-Jou Feng) ； 何俊明(Chun-Ming Ho) ； 陳志祥(Jhih-Siang Chen)

《中國土木水利工程學刊》 25卷1期 (2013/03) Pp. 79-86

https://doi.org/10.6652/JoCICHE.201303_25(1).0008

摘要

Anaerobic ammonia oxidation(ANAMMOX ANaerobic AMMonium Oxidation) reaction, which can effectively shorten the traditional biological nitrification and denitrification processes and reduce operating costs and complexity, has become the international trend of researches on biological nitrogen removal. In this study, anaerobic ammonium oxidizing bacteria were acclimated from activated sludge of domestic wastewater treatment plant, and batch experiments were conducted to investigate the effects of different concentrations of ammonia and nitrite on the efficiency of nitrogen removal of ANAMMOX. The experimental results show that controlling the reaction conditions (Ph =7 ± 0.2, DO ＜ 0.7 mg/L) and NO2^(-)-N = 50 mg/L, the nitrogen removal efficiencies of ANAMMOX were less affected with different concentrations of NH4^(+)-N. Low concentrations of NH4^(+)-N (NH4^(+)-N = 25, 50, 100 mg/L), the anaerobic ammonia oxidation can occur. Until one of the both reactants ammonia and nitrite is exhausted, the reaction stopped. At higher concentrations of NH4^(+)-N (NH4^(+)-N = 200, 250 mg/L) conditions, ANAMMOX bacteria need a longer time to carry out anaerobic ammonia oxidation in the higher ammonia load. The higher the ammonia concentration, the longer adaptation period were needed.If the reaction conditions (pH = 7 ± 0.2, DO ＜ 0.7 mg/L) and NH4^(+)-N = 25 mg/L concentration were fixed, the effects of NO2^(-)-N concentrations on ANAMMOX reaction were significantly different due to NO2^(-)-N concentration level. Low concentrations of NO2^(-)-N (NO2^(-)-N = 10, 25, 50 mg/L), anaerobic ammonia oxidation reaction can still be carried out in this reaction periods. In higher concentrations of NO2^(-)-N (NO2^(-)-N = 75, 100 mg/L), anaerobic ammonia oxidation reaction in system was evidently retarded with NO2^(-)-N = 75 mg/L. The reaction was completely inhibited when the concentration of NO2^(-)-N was raised to 100 mg/L. This situation can markedly cause toxic to ANAMMOX bacteria. Even lowering the concentrations of NO2^(-)-N, the original activity of nitrogen removal cannot be restored.

關鍵字

厭氧氨氧化 ； 部份硝化 ； 生物脫氮

並列摘要

Anaerobic ammonia oxidation(ANAMMOX ANaerobic AMMonium Oxidation) reaction, which can effectively shorten the traditional biological nitrification and denitrification processes and reduce operating costs and complexity, has become the international trend of researches on biological nitrogen removal. In this study, anaerobic ammonium oxidizing bacteria were acclimated from activated sludge of domestic wastewater treatment plant, and batch experiments were conducted to investigate the effects of different concentrations of ammonia and nitrite on the efficiency of nitrogen removal of ANAMMOX. The experimental results show that controlling the reaction conditions (Ph =7 ± 0.2, DO ＜ 0.7 mg/L) and NO2^(-)-N = 50 mg/L, the nitrogen removal efficiencies of ANAMMOX were less affected with different concentrations of NH4^(+)-N. Low concentrations of NH4^(+)-N (NH4^(+)-N = 25, 50, 100 mg/L), the anaerobic ammonia oxidation can occur. Until one of the both reactants ammonia and nitrite is exhausted, the reaction stopped. At higher concentrations of NH4^(+)-N (NH4^(+)-N = 200, 250 mg/L) conditions, ANAMMOX bacteria need a longer time to carry out anaerobic ammonia oxidation in the higher ammonia load. The higher the ammonia concentration, the longer adaptation period were needed.If the reaction conditions (pH = 7 ± 0.2, DO ＜ 0.7 mg/L) and NH4^(+)-N = 25 mg/L concentration were fixed, the effects of NO2^(-)-N concentrations on ANAMMOX reaction were significantly different due to NO2^(-)-N concentration level. Low concentrations of NO2^(-)-N (NO2^(-)-N = 10, 25, 50 mg/L), anaerobic ammonia oxidation reaction can still be carried out in this reaction periods. In higher concentrations of NO2^(-)-N (NO2^(-)-N = 75, 100 mg/L), anaerobic ammonia oxidation reaction in system was evidently retarded with NO2^(-)-N = 75 mg/L. The reaction was completely inhibited when the concentration of NO2^(-)-N was raised to 100 mg/L. This situation can markedly cause toxic to ANAMMOX bacteria. Even lowering the concentrations of NO2^(-)-N, the original activity of nitrogen removal cannot be restored.

並列關鍵字

ANAMMOX ； partial nitrification ； biological denitrification